Proceedings

 

Proceedings from the 12th National Conference on Earthquake Engineering are available on this page. All available papers and conference materials supplied to 12NCEE are in these files.

The “view paper” links will take you to the EERI Digital Library, where EERI Members can log in to download materials. If you are not a member, you can still download 12NCEE content by entering your name and email address. Papers will download as pdfs or zip files if other presentation materials are included.

TUESDAY, JUNE 28, 2022

June 28, 2022 8:30 am - 9:30 pm

P.S.01 Welcome and Opening Plenary: Advancing Seismic Safety in Utah

Where: Salt Palace-Ballroom E-J

Session Type: Plenary Session

The March 2020 Magna earthquake was a potent reminder that Utah’s buildings and infrastructure are not yet prepared for a major earthquake event on the Wasatch Fault. Although earthquake risk mitigation has been ongoing in Utah for decades, efforts to advance seismic safety throughout the state have gained new momentum in recent years.

Utah Governor Spencer J. Cox will deliver the keynote at this Opening Plenary session, followed by a moderated roundtable discussion with state representatives and advocates for seismic safety. Speakers will discuss the significant advancements Utah has made in areas such as conducting seismic retrofits and developing URM risk reduction strategies, and highlight the next steps for future action. The session will close with a welcome from the EERI President and 12NCEE Organizing Committee Chairs with an introduction to the week ahead.

The Honorable Spencer J. Cox

The Honorable Spencer J. Cox

Speaker - Oral
Keynote Speaker
David Cocke

David Cocke

Moderator
Session Moderator
Lisa G. Sun, JD

Lisa G. Sun, JD

Speaker - Oral
Roundtable Moderator
The Honorable Clare Collard

The Honorable Clare Collard

Speaker - Oral
Roundtable Speaker
The Honorable V Lowry Snow

The Honorable V Lowry Snow

Speaker - Oral
Roundtable Speaker
Jessica S. Chappell, SE

Jessica S. Chappell, SE

Speaker - Oral
Roundtable Speaker
Robert J. Grow, J.D.

Robert J. Grow, J.D.

Speaker - Oral
Roundtable Speaker

June 28, 2022 10:00 am -11:30 am

S.S.01 The 2020 Magna, Utah, Earthquake: The Event, Its Impacts, and Implications to Hazard and Risk Along the Wasatch Front

Where: Salt Palace-Ballroom A

Session Type: Special Session

On 18 March 2020, a M 5.7 earthquake shook the Salt Lake Valley and adjacent portions of the Wasatch Front. The earthquake was the largest such event experienced in the valley since settlement by pioneers in the mid 1800's and was the first significant earthquake ever experienced by the vast majority of the population along the Wasatch Front. Damage was reported throughout the Valley in old and new buildings with a total estimated cost exceeding $50 million. The Wasatch fault has been traditionally modeled as a moderately-dipping normal fault and the resulting hazard estimates are embedded in the seismic design of modern structures all along the Wasatch Front. The most significant scientific observation of the Magna earthquake was that it probably occurred on a listric portion of the Wasatch fault. If this interpretation is correct then it would represent a paradigm shift for earthquake hazard and risk analysis along the Wasatch fault. In this Special Session, the geology and seismology of the Magna earthquake, its impact on the built environment, with the potential implications for hazard, risk, and future seismic design along the Wasatch Front will be discussed.

Jessica S. Chappell, SE

Jessica S. Chappell, SE

Speaker - Oral
Special Session Presentation Abstract – The 2020 Magna, Utah Earthquake: Building Structure Impacts and the Effects of Building Code Adoption and Enforcement
Emily Kleber

Emily Kleber, MS

Speaker - Oral
Geologic Perspective of the 2020 Magna, Utah Earthquake Sequence
James C. Pechmann

James C. Pechmann, Ph.D.

Speaker - Oral
A Seismological Overview of the 2020 M 5.7 Magna, Utah, Earthquake
Ivan G. Wong

Ivan G. Wong

Speaker - Oral
The 2020 Magna, Utah, Earthquake: The Event, Its Impacts, and Implications to Hazard and Risk Along the Wasatch Front
Ivan G. Wong

Ivan G. Wong

Speaker - Oral
The Implications of a Listric Wasatch Fault for Seismic Hazard, Design, and Risk Along Utah's Wasatch Front

June 28, 2022 10:00 am -11:30 am

S.S.02 Challenging the Code: Using Problem-Focused Studies to Improve Seismic Design Practice

Where: Salt Palace-Ballroom B

Session Type: Special Session

This session presents three FEMA NEHRP-funded projects that expose weaknesses in current seismic design practice and engages the audience on how these and future projects can help improve the code. The first half will provide an overview of relevant findings from the subject projects and their code implications. Afterward, the audience will participate in a guided discussion about translating these findings into code recommendations and be asked to share ideas for future projects that could be used to shape seismic design practice. Highlighted projects: ATC-145, 'Guide for Repair of Damaged Buildings to Achieve Future Resilience', which is using analytical studies to explore the performance implications of IEBC post-earthquake repair triggers and recommend improvements to post-earthquake assessment and repair; ATC-154, 'Improving Seismic Performance for New Buildings in Very High Seismic Risk Regions', which is addressing the issue that buildings subjected to very high-seismic ground motions may incur higher collapse risk than the targets of national model codes; and FEMA P-1026 report update, 'Seismic Design of Rigid Wall-Flexible Diaphragm Buildings: An Alternative Procedure', which has found that current code provisions for these buildings may result in designs that fail to meet code objectives and proposes a new design procedure to improve performance.

Kenneth Elwood

Kenneth Elwood, Professor

Speaker - Oral
ATC-145: Guideline for Post-Earthquake Assessment, Repair, and Retrofit of Buildings
speaker male

Dominic J. Kelly, P.E.

Speaker - Oral
FEMA P-1026 Report Update, Seismic Design of Rigid Wall-Flexible Diaphragm Buildings: An Alternative Procedure
Charles Kircher

Charles Kircher, PhD

Speaker - Oral
Improving Seismic Performance for New Buildings in Very High Seismic Risk Regions
Chiara McKenney

Chiara McKenney

Speaker - Oral
Challenging the Code: Using Problem-Focused Studies to Improve Seismic Design Practice

June 28, 2022 10:00 am -11:30 am

S.S.03 Next-Generation Liquefaction Database and Models

Where: Salt Palace-Ballroom C

Session Type: Special Session

This session will present the status and future directions of research under the Next Generation Liquefaction (NGL) Project. NGL is advancing the state of the art in liquefaction research and working toward providing end users with a consensus approach to assess liquefaction hazards within a probabilistic and risk-informed framework. NGL has three main components featured in this session: database, supporting studies, and model development.

The NGL database is broadly inclusive, incorporating as many existing liquefaction case histories as practicable, including many of the recent events in Turkey, Taiwan, Italy, Japan, and New Zealand that have not been used in existing liquefaction models. Data in the database includes (i) information about the triggering events based on the Next Generation Attenuation databases as well as several new non-NGA events; (ii) site geotechnical data, including penetrometer tests, geophysical logs, and laboratory data; and (iii) site observational data, including photos, satellite images, maps, and links to published datasets such as LiDAR point clouds. Presentations will emphasize the database content, how it can be used, and significant new data added as part of NGL.

Supporting studies investigate specific issues relevant to model development that cannot be developed from case histories. This session will feature a supporting study on stress effects. Presentations on ongoing research to develop NGL models for liquefaction effects will be made by the project’s Supported Modeling Team and an additional collaborative team

BrianCarlton

Brian Carlton

Speaker - Oral
Review of available data on the effects of confining pressure and initial static shear stress for use in liquefaction triggering analyses
KemalOnderCetin

Kemal Onder Cetin, Prof. Dr.

Speaker - Oral
Reliability-based Unified SPT-CPT-Vs Liquefaction Triggering Models
KennethSHudson

Kenneth S. Hudson

Speaker - Oral
NGL Supported Modeling Team Approach
speaker male

John A. Stamatakos, Ph.D.

Speaker - Oral
Next Generation Liquefaction (NGL) Overview
6C Stewart

Jonathan P. Stewart, Ph.D., PE

Speaker - Oral
Next-Generation Liquefaction Database and Models
KristinJUlmer

Kristin J. Ulmer, Ph.D.

Speaker - Oral
Next Generation Liquefaction Database and Cloud Computing

June 28, 2022 10:00 AM - 11:30 AM

S.S.04 A Discussion with Multiple Perspectives on the Current and Future State of Seismic Structural Health Monitoring in the US

Where: Salt Palace: Ballroom D

Session Type: Sponsored Session

The primary objective of Seismic Structural Health Monitoring (SSHM) is to provide decision-makers with helpful and timely information regarding the structural state-of-health after a seismic event. The benefits of SSHM include enhanced situational awareness and enabling rapid or automatic response actions. Not to be confused with SHM, which promises to raise an alarm at the onset of potential damage before it reaches a critical state. But what constitutes SSHM and why is it not as prevalent as many experts believe it could and should be.

This session aims to address these questions and provide insight into the current and near-future viability of SSHM. Multiple perspectives, including those from industry (i.e., practicing engineers and technology providers) as well as public/government institutions charged with managing large inventories of densely instrumented structures (i.e., USGS and CSMIP) will first be presented. A moderated discussion with Q&A then follows with intention to reach a consensus on the current and future state of SSHM in the US.

This session was designed and sponsored by Kinemetrics. 

Kinemetrics

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MEHMET CELEBI, PhD

Speaker - Oral
S2HM Revisited - It Should Be Real-time
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Daniel Swensen

Speaker - Oral
Real Time Seismic Structural Monitoring at California Geological Survey's Strong Motion Instrumentation Program (CSMIP)
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Mauricio Ciudad-Real, MSc

Speaker - Oral
Seismic Structural Health Monitoring (SSHM), Technology Provider Perspective
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Farzad Naeim

Speaker - Oral
Seismic Structural Health Monitoring (SSHM), A Practicing Engineer’s Perspective
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Derek A. Skolnik

Session Organizer
A Discussion with Multiple Perspectives on the Current and Future State of Seismic Structural Health Monitoring in the US

June 28, 2022 10:00 AM - 11:30 AM

S.S.05 The HayWired Scenario: Societal Consequences

Where: Salt Palace: 250 DEF

Session Type: Special Session

The HayWired scenario team co-produced analyses of societal consequences to complete a story of a large earthquake on the Hayward fault in the San Francisco Bay Area. Volume three of the scenario investigates factors of population displacement, long term recovery challenges, macroeconomic employment and gross regional product losses, causes of business disruption, telecommunications disruptions and effects on the digital economy. Inputs to these analyses include building damage and utility and transportation restoration estimates. Speakers will present on the main findings of societal consequence analyses, community engagement in the development and communication of the scenario, and examples of use.

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A.J. Faas, PhD

Speaker - Oral
Post-Vulnerability: Reciprocal Knowledge Production for Disaster Risk Reduction with the HayWired Scenario
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Laurie Johnson, PhD

Speaker - Oral
Where is Home After a M7.0 Hayward Fault Earthquake in the Bay Area: Results of the Communities-at-Risk Analysis of the HayWired Scenario
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Cynthia Kroll, PhD

Speaker - Oral
Exploring Economic Consequences in the HayWired Scenario
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Divya Chandrasekhar, PhD

Session Organizer
The HayWired Scenario: Societal Consequences
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Anne M. Wein

Speaker - Oral
The HayWired Scenario: Engineering Inputs for Analyses of Societal Consequences

June 28, 2022 10:00 AM - 11:30 AM

S.S.06 YMC Effective Writing Workshop for Young Professionals and Academics

Where: Salt Palace: 251 ABC

Session Type: Special Session

This YMC special session is targeted towards graduate students or other early-career scholars who are interested in improving their technical writing skills and productivity. The Younger Members Committee (YMC) is a group of interdisciplinary graduate students and early-career earthquake professionals and academics and provides professional development and networking opportunities for younger members within EERI. This workshop will be led by Dr. Jack Baker and will include a mix of presented materials, individual work, and a large-group discussion.

The planned topics are as follows:

  1. Presentation: navigating the writing process, from idea to final paper
  2. Presentation: how to structure your paper abstract - Individual exercise: editing an example abstract to increase clarity
  3. Presentation: tips for productive writing
  4. Question-and-answer session: exchange of general questions and ideas

Our goal is for you to leave with concrete ideas that you can use in your future writing. Hopefully, you will also meet and get to know some younger members at a similar stage as you.

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Jack W. Baker, Ph.D.

Speaker - Oral
YMC Effective Writing Workshop for Early Career Professionals, Academics, and Graduate Students
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Dustin Cook, PhD

Speaker - Oral
YMC Effective Writing Workshop for Early Career Professionals, Academics, and Graduate Students
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Alexandria Julius

Session Organizer
YMC Effective Writing Workshop for Early Career Professionals, Academics, and Graduate Students

Mohsen Zaker Esteghamati

Session Organizer
YMC Effective Writing Workshop for Early Career Professionals, Academics, and Graduate Students
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Diane Moug, PhD

Session Organizer
YMC Effective Writing Workshop for Early Career Professionals, Academics, and Graduate Students

June 28, 2022 10:00 AM - 11:30 AM

T.S.01 Seismic and Site Response Data Collection

Where: Salt Palace: 150 G

Session Type: Technical Topic Session

This session focuses on studies related to seismic data collection, site response data collection, and their derivative products. Such data are of great importance in engineering seismology, development of ground motion models, and seismic hazard and risk assessments. Discussions related to improvements and modernization at the data centers serving these data and products are highlighted in this session.

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Cristina Lorenzo-Velazquez

Moderator
 
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Jamison Steidl

Speaker - Oral
Modernization of Data Processing and Review at the U.S. Geological Survey’s National Strong Motion Project (NSMP)
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Hamid Haddadi, PhD

Speaker - Oral
Update On The Center For Engineering Strong-Motion Data (CESMD)
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Brad Aagaard

Speaker - Oral
Improving the Development Pipelines for USGS Earthquake Hazards Program Real-Time and Scenario Products
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Francisco J. Sanchez-Sesma, PhD

Speaker - Oral
Three-dimensional Effects in the Seismic Response of Two-dimensional Alluvial Valleys for Oblique Incidence of P, SV, SH and Rayleigh Waves
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Silvia Mazzoni, PhD

Speaker - Oral
Comprehensive Expansion of the NGA-West2 Database to Include Inelastic-Response Intensity Measures
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Kami Mohamamdi

Speaker - Lightning
Three-Dimensional Site Effects at Mortandad Canyon, NM: Validation against ambient noise recordings of topography effects
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Tara Nye

Speaker - Lightning
Estimates of Kappa in the San Francisco Bay Area
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Muhammad Khalid Saifullah

Speaker - Lightning
Fragility of Precariously Balanced Rocks: Shake Table Testing and Numerical Modeling for a Sample Granitic Rock
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Garet Huddleston

Speaker - Lightning
Interfacing the National Strong Motion Project Near-surface Site Characteristic Data Compilation at Advanced National Seismic System Accelerometer Sites with Strong-Motion Waveform Datasets

June 28, 2022 10:00 AM - 11:30 AM

T.S.02 Advances in Performance Assessment of Structures I

Where: Salt Palace: 250 ABC

Session Type: Technical Topic Session

This is the first of three sessions featuring a wide array of studies on assessing the performance of structural systems and components subjected to extreme loading, with focus on predicting inelastic behavior and damage mechanisms.

Luis F. Ibarra

Moderator
 
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Chung Che Chou

Speaker - Oral
Seismic Response of I-Shaped Steel Columns in Two-Story Subassemblage Frames
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Cristian Cruz, PhD

Speaker - Oral
2% or 5%? Effect of Variability in Damping Ratios on the Seismic Performance of Steel Moment-Frame Buildings
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Amin Hariri, PhD

Speaker - Oral
Quantification of Modeling Uncertainty in an RC Bridge Column
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Laura L. Hernandez-Bassal

Speaker - Oral
Performance-Based Assessment of Steel Moment Frames with and without Panel Zones
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YeYing Jan

Speaker - Oral
Response History Analyses of a Full-Scale 4-Story Steel Building Specimen
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Orlando Arroyo

Speaker - Oral
A framework to assess the seismic vulnerability of informally constructed houses: a case study in Villavicencio, Colombia

June 28, 2022 10:00 AM - 11:30 AM

T.S.03 High-Performance Engineering Materials

Where: Salt Palace: 251 DEF

Session Type: Technical Topic Session

Presentations will showcase studies on the use of high-performance engineering materials in structural components, including ultra-high performance concrete and high-strength steel.

Kristen Hess

Moderator
 
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Mary Beth D. Hueste, PhD

Speaker - Oral
Influence of Shape Memory Alloy Reinforcement on the Seismic Response of a Tall Building
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Clarissa Jasinda

Speaker - Oral
Axial Compressive Capacity of High-strength Circular Hollow Concrete-filled Steel Tube Piles

Milana Cimesa

Speaker - Oral
Compressive Behavior of Nano-Enhanced UHPC for Future Seismic Columns
09719b83 e415 43fb b947 e76b6825c758 1 head shot

Mohamed Moustafa

Speaker - Oral
Strength Maturity Method for Quality Control of Field-Cast UHPC Seismic Accelerated Bridge Construction Connections
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SHIH HO Chao, PhD

Speaker Online Only
Full-scale Testing of Double-Beam Coupling Beam (DBCB) with High-Strength Reinforcement
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Mahesh Acharya, PhD Student

Speaker Online Only
Titanium Alloy Bars for Construction of Resilient and Durable Concrete Structures

June 28, 2022 12:15 PM - 1:00 PM

C.M.05 EERI Southern California Regional Chapter Meeting

Where: Salt Palace: 254 ABC

Session Type: Chapter Meetings

General update on chapter activities and initiatives, and an open discussion about ideas for improving member value. This meeting is open to all conference attendees.

 

June 28, 2022 1:30 PM - 3:00 PM

S.S.07 Earthquake response in Small Town USA: Lessons from the 2020 Magna UT Earthquake

Where: Salt Palace: Ballroom A

Session Type: Special Session

Effective earthquake response and recovery require a high level of coordination among local, state, federal and nonprofit actors. This in turn requires high levels of planning, networking, and organizational capacity on the part of each actor, which difficult in most communities but even more so for small towns in the US. Small, rural towns often have fewer resources to dedicate towards hazard risk analysis, pre-event disaster planning, or post-disaster response management. How do small towns navigate such complex response conditions? What are challenges and opportunities for small towns to respond effectively to earthquakes while also building resilience towards the next event? This panel brings together local and state officials from Utah, as local disaster policy experts to discuss earthquake response after the 2020 Magna UT Earthquake. The session will highlight governance related challenges in responding to earthquakes in small towns as well as creative ways in which small towns manage to navigate the complexities of disaster response.

Brad Bartholomew

Speaker - Oral
Earthquake response in Small Town USA: Lessons from the 202 Magna UT Earthquake
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Divya Chandrasekhar, PhD

Speaker - Oral
Earthquake response in Small Town USA: Lessons from the 2020 Magna UT Earthquake
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Gregory L. Schulz, MPA

Speaker - Oral
Earthquake response in Small Town USA: Lessons from the 2020 Magna UT Earthquake
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Divya Chandrasekhar, PhD

Session Organizer
Earthquake response in Small Town USA: Lessons from the 2020 Magna UT Earthquake
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Lisa G. Sun, JD

Speaker - Oral
Earthquake Response in Small Town USA

June 28, 2022 1:30 PM - 3:00 PM

S.S.08 Climate Action: A Seismic Safety Opportunity?

Where: Salt Palace: 250 DEF

Session Type: Special Session

This special session examines the two-fold dilemma of how growing investment to combat climate change diminishes resources allocated to earthquake risk mitigation. First, other hazards exacerbated by climate change compete with seismic mitigation for funding and attention. For example, no Building Resilient Infrastructure and Communities (BRIC) project awards in FY 2020 involved seismic mitigation, and earthquakes are not listed as a priority for the 2021 Hazard Mitigation Grant Program (HMGP) funding opportunity in California. However, even as risks from other hazards grow due to climate change, seismic risk to communities does not lessen. Second, investments in energy retrofits for buildings to mitigate climate change do not often consider seismic vulnerability of the buildings, risking massive losses of investment if they do not include upgrades to mitigate seismic risk.

The session is divided into two portions. To begin, five panelists will frame the policy issue, providing their background and observations of the problem statement for 7 minutes each. A wide ranging articulation of the issue lends utility, providing viewpoints on the shared risk and opportunities of multiple hazards from various stakeholder perspectives and identification of common language. Panelists from the local to federal levels will highlight both ends of the grant mechanisms that fund all hazard mitigation. A government perspective will showcase the dilemma and reasoning to allocate funds for one hazard vs. another. A panelist from or versed in the insurance industry can speak to the variance in insurance value between hazards at different scales in time and space, and further complication of risks posed by cascading failures. Representation from the energy industry is crucial to link consideration of natural hazards risk to the goals of energy retrofits for buildings. The panelists will initiate a broad conversation that also will address specific policies, including the Infrastructure Investment and Jobs Act.

The second portion of the session will shift focus to developing solutions to the problem. Panelists will ask questions like: what do we do now? how much funding do we need? what do we still not know? what role can and should seismic safety advocates play in addressing the issue? Several avenues will need consideration. Mitigation funds are currently assigned by hazard, but a multi-hazard approach could ensure that all risks remain on the radar. Minimum seismic performance standards would head off seismic vulnerability of older buildings most in need of a green retrofit. As hazard mitigation priorities intertwine, policy strategy can evolve to gain wider legislative appeal at the state and federal level. At the local level, more holistic hazard consideration enables more efficient disbursement of funds to address the multi-hazard environment. While informing experts at a special session will be beneficial, initial development of a communication strategy for the wider public to establish buy-in for all hazards mitigation may have ten times the value. Panelists will leverage their expertise to hone both their suggestions and moderate contributions from the audience to draft potential solutions. Panelists are encouraged to view solutions through a financial lens since hazard mitigation is typically viewed in terms of return on investment.

The panel will encourage the audience to find new ways to engage in the climate mitigation and adaptation discussion with an all-hazards approach that appropriately addresses seismic risk.

ryan colker headshot

Ryan M. Colker, J.D.

Speaker - Oral
A Holistic Approach to Building Resilience: Integrating Sustainability and Hazard Resistance
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Laurie Johnson, PhD

Speaker - Oral
The Role of Insurance in Build Resilience and Financing Risk for Earthquakes and Climate-related Hazards
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Danielle Mieler

Speaker - Oral
Climate and Earthquake Resilient Existing Buildings
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Amanda C. Siok, Master of Urban Planning- MUP

Speaker - Oral
Climate Action: A Seismic Safety Opportunity – A Federal Perspective
john van de lindt

John van de Lindt, Harold H. Short Endowed Chair Professor,

Speaker - Oral
Community Resilience: Diversification is the Key to a Balanced Portfolio
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Jack English

Moderator
 

June 28, 2022 1:30 PM - 3:00 PM

T.S.04 Structural Seismic Codes and Standards

Where: Salt Palace: Ballroom B

Session Type: Technical Topic Session

This session focues on structural seismic codes and standards, particularly in the United States. Attend this session to understand the the history of the NEHRP Provisions and ASCE 7 and to learn about current studies to improve codes and standards.

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Rafael Sabelli, Senior Principal, Director of Seismic Design

Moderator
 
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Andrew J. Makdisi, PhD, PE

Speaker - Oral
Evolution of Design Ground Motions in California: NEHRP 2009 to 2020
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John Hooper

Speaker - Oral
2026 NEHRP Provisions Update Cycle—Future Issues
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Emily Guglielmo

Speaker - Oral
ASCE/SEI 7 Development Process and Technical Changes to the Seismic Provisions in the 2022 Edition

Katrina Peralta

Speaker - Oral
The USGS Seismic Design Geodatabases for the NEHRP Provisions, ASCE/SEI 7 Standard, and International Building Code
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James Gaitan

Speaker - Oral
Impact of Ground Motion Record Scaling Methods for Seismic Design of Near-Fault Structures
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Alan A. Rivera

Speaker - Oral
Spectral Matching RotD100 - Effects on Biaxial Lateral Demand of a Reinforced Concrete Frame Building

June 28, 2022 1:30 PM - 3:00 PM

T.S.05 Liquefaction and Ground Failures

Where: Salt Palace: Ballroom C

Session Type: Technical Topic Session

Soil liquefaction has historically been one of the most damaging and common effects associated with earthquake events. This session will focus on recent engineering advances in our understanding and modeling of soil liquefaction and its effects.

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Nancy Ingabire Abayo

Moderator
 
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Lianne Brito

Speaker - Oral
Design and Construction of a Deformation Measurement System for Dynamic Centrifuge Modeling of Layered Liquefiable Soils
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Min-Chien Chu, Ph.D.

Speaker - Lightning
The modified model for normalized excess pore water pressure generation curves of low-plastic soils from the northern Taiwan
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Jessica P. Feenstra

Speaker - Lightning
A Framework for Developing a New Liquefaction Hazard Map for Anchorage, Alaska
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Jonathan Hubler, PhD

Speaker - Lightning
Effect of Particle Morphology on the Liquefaction and Post-Liquefaction Response of Two Uniformly-graded Sands
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On Lei Annie Kwok, PHD

Speaker - Lightning
Liquefaction Behavior of Unsaturated Sand with Non-Plastic Fines
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Jorge Macedo

Speaker - Oral
Probabilistic Assessment of Liquefaction Induced Building Settlement in Performance-Based Earthquake Engineering
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Diane Moug, PhD

Speaker - Oral
Relating Cyclic Strength to CPT Data for Fine-grained and Transitional Soils in Oregon and Washington
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ali dadashiserej

Speaker - Oral
Influence of Natural Soil Fabric on the Cyclic Resistance of Low and High Plasticity Silts
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Ana Maria Valverde Sancho, PhD Candidate

Speaker - Lightning
X-Ray Micro-Computed Tomography Imaging to Study Silt Fabric
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Yu-Wei Hwang, Ph.D.

Speaker Online Only
LPI-based Probabilistic Predictive Model for Foundation Settlement on Liquefiable Sites

Zach Bullock, PhD

Speaker - Lightning Online Only
A Liquefaction Loss Index for Rapid Community Resilience Assessment

June 28, 2022 1:30 PM - 3:00 PM

T.S.06 Experimental Testing and Hybrid Simulation of Structures

Where: Salt Palace: Ballroom D

Session Type: Technical Topic Session

Several studies on laboratory testing of the performance of structural components and systems are featured in this session, with focus on the use of hybrid simulation methods.

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Mohamed Moustafa

Moderator
 
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Baiping Dong, PhD

Speaker - Oral
Real-time Hybrid Simulation of Pulse-type Ground Motions Effects on Steel Building with Nonlinear Viscous Dampers
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Allan Joseph D. Romero

Speaker - Oral
Repair and Shake Table Testing of Out-of-Plane Seismic Response of Simplified Cast-in-Place Joints using ABC Pocket Connection
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Sifat Muin

Speaker Online Only
Bridge Rapid Assessment Center for Extreme Events (BRACE2) and Application to Route 580/238 Separation Bridge
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Kung-Juin Wang, Dr.

Speaker - Oral
Hybrid Simulation a Seven-story BRBF Using a Mixed Displacement and Force Control Method for the First-story Beam-to-column Subassemblage
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Jared Cantrell, MS

Speaker - Lightning
Large-Scale Testing of Seismically Resilient Precast Concrete Pier System Incorporating Concrete-Filled Steel Tubes in the Plastic Hinges
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Erica Fischer, PhD

Speaker - Lightning
Experimental Research on Glulam Beam-to-Column Connections under Seismic Conditions
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Natalia Guerrero Castro

Speaker - Lightning
Jupyter Notebooks for Data Workflow of NHERI Experimental Programs
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James Ricles

Speaker - Lightning
Multi-directional Seismic Behavior Assessment of a Tall Building using Real-Time Hybrid Simulations

Sai Sharath Parsi, MS

Speaker Online Only
Impedance Matching Control Design for Real-Time Hybrid Testing of a Base-Isolated Fluid-Filled Vessel

June 28, 2022 1:30 PM - 3:00 PM

T.S.07 Earthquake Hazard and Design Ground Motions

Where: Salt Palace: 150 G

Session Type: Technical Topic Session

Seismic hazard models and design ground motions derived from those models are the link between the best-available earthquake science and the earthquake engineering practice. This session provides a global survey of seismic hazard model development including a variety of tectonic regions. It also highlights studies related to calculation of design ground motions based on the latest constructions codes in the U.S.

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Robert E. Chase, PhD

Moderator
 
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Kenneth S. Hudson

Speaker - Oral
Implications of the ASCE 7-22 Multi-Period Response Spectra on Structural Design for the Greater Los Angeles Metropolitan Area.
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Luis A. Amezcua

Speaker - Oral
Estimation of Average Spectral Acceleration during Subduction Interface Earthquakes
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Ivan G. Wong

Speaker - Oral
Development of Probabilistic Seismic Hazard Maps for the State of South Carolina
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Andres Felipe Hernandez Estrada, PhD Student

Speaker - Oral
Time-Dependent Model for an Induced Seismicity Case Study in the UK
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Zehan Liu

Speaker - Oral
Validation of Regression-Based Event Selection for Seismic Risk Assessment of Distributed Levee System in California
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Salvatore Iacoletti

Speaker - Oral
Unsegmented Long-Term Time-Dependent Modeling of the Nankai Subduction Zone (Japan)

Pierre B. Labbé, PhD

Speaker - Lightning Online Only
A Procedure For Testing PSHA Outputs Against Historical Seismicity By Risk Analysis, Example Of Continental France

Max Wyss, PhD

Speaker - Lightning Online Only
A Common Sense Review of Assessing Seismic Hazard

June 28, 2022 1:30 PM - 3:00 PM

T.S.08 Seismic Evaluation and Design of Nonbuilding and Nonstructural Systems

Where: Salt Palace: 151 G

Session Type: Technical Topic Session

This session focuses on the seismic evaluation and design of nonbuilding structures and nonstructural systems. Attend this session to learn about wharf structures, bridges, nonstructural components, and other nonbuilding structures.

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Hernan Santa Maria

Moderator
 
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Hernan Santa Maria

Speaker - Oral
A Simplified Method to Assess the Technical Feasibility of Multistory Wood-Frame Buildings with Shear Walls
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ijan dangol

Speaker - Oral
Performance Evaluation of Two Hybrid Bridge Bents Using Quasi-Static Cyclic Tests
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Ramtin Kouhdasti

Speaker Online Only
Response Spectrum Analysis of Water-Structure Systems using Water Added-Mass Modified Ground Acceleration Spectra
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Han Xiao

Speaker Online Only
Seismic Design of Pile-Supported Wharf Structures Aided by Machine Learning
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Pedro Ramos, PhD Student

Speaker Online Only
Sufficiency and Efficiency of Energy-based Intensity Measures for Rocking Irregular Rigid Bodies
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Venkatesh Patnana

Speaker Online Only
Seismic Performance of Vertical Strut and Lateral Brace Suspended Continuous Plasterboard Ceiling under Shake Table Generated Motions

June 28, 2022 1:30 PM - 3:00 PM

T.S.09 Advances in Performance Assessment of Structures II

Where: Salt Palace: 250 ABC

Session Type: Technical Topic Session

This is the second of three sessions featuring a wide array of studies on assessing the performance of structural systems and components subjected to extreme loading, with focus on predicting inelastic behavior and damage mechanisms.

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Barbara G. Simpson, PhD

Moderator
 
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Saman A. Abdullah, PhD

Speaker - Oral
Damage Limit States of Reinforced Concrete Flexure-Controlled Walls with Code-Conforming Detailing
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Victor A. Calderon, P.E., MCE

Speaker - Oral
Impact of Corrosion on the Strain Demands of RC Columns Due to Seismic Loading
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Diego Martinez, PhD

Speaker - Oral
Trilinear Modal Damping for the Inelastic Analysis of Reinforced Concrete Bridges
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Hamidreza Sarmadi, PhD, PE

Speaker - Oral
Force-Deformation Model with Secondary Stiffness and Ductility
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Andronikos Skiadopoulos

Speaker - Oral
Seismic Stability of Steel Moment Resisting Frames with Inelastic Panel Zones
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Ankul Kumar

Speaker Online Only
Performance of Silo Structure under the Effect of Seismic Loading

June 28, 2022 1:30 PM - 3:00 PM

T.S.10 Seismic Performance of Pipes and Pipeline Systems

Where: Salt Palace: 251 ABC

Session Type: Technical Topic Session

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Jongwon Lee, Ph.D., P.E.

Moderator
 
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Brad P. Wham, PhD

Speaker - Oral
Experimental Seismic Assessment of Water Distribution Pipelines: Axial Cyclic Testing
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Hailey-Rae Rose

Speaker - Oral
Centrifuge Modeling of Frictional Resistance Along Buried Pipelines with Enlarged Joints
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Kotaro KOJIMA

Speaker - Oral
Earthquake Responses of Piping Systems and Elevated Water Tanks Equipped on Steel Hospital Building Specimen
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Pengfei Wang, Ph.D.

Speaker - Oral
Regression-Based Event Selection for Hazard-Consistent Seismic Risk Assessment
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Neal Kwong

Speaker - Oral
A Theoretical Framework for Integrating Ground Failure Models into Regional Seismic Performance Assessments of Buried Pipelines
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Fan-Ru Lin, PhD

Speaker - Oral
Seismic Strengthening Strategies for Sprinkler Piping Systems in Hospitals

June 28, 2022 1:30 PM - 3:00 PM

T.S.11 Advances in Seismic Isolation

Where: Salt Palace: 251 DEF

Session Type: Technical Topic Session

Presentations in this session showcase studies on seismic-isolation techniques, and the performance of base-isolated structures.

Chris EN. Pantelides

Moderator
 
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Ricardo Bustamante

Speaker - Oral
Seismic Strengthening Strategies for Sprinkler Piping Systems in Hospitals
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Ricardo Bustamante

Speaker - Oral
Inelastic superstructure response of base-isolated systems using nonlinear response spectra under extreme loading
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Rolando A. Grijalva Alvarado, Msc

Speaker - Oral
Characterization of an Ice Contaminated Single Friction Pendulum Bearing
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Kaivalya M. Lal

Speaker - Oral
Protection of Safety-Class Equipment in Advanced Reactors using Seismic Isolation
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Kaivalya M. Lal

Speaker - Oral
Earthquake Simulator Experiments of a Seismically Isolated Generation IV Reactor Model
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Shiang-Jung Wang

Speaker Online Only
Numerical Study on Sloped Rolling-type Isolators Designed with Stepwise Variable Sloping Angles and Damping Force

June 28, 2022 3:30 PM - 5:00 PM

S.S.09 Does the Building Code Adequately Protect the Wasatch Front Communities from a Wasatch Fault Earthquake?

Where: Salt Palace: Ballroom A

Session Type: Special Session

The Wasatch Fault Zone is the major source of seismic hazard along Utah's heavily populated Wasatch Front, and it has a long recurrence interval (being on the order of 900 to 1300 years and perhaps 2800 years on some segments). Because of this, and because of the methodology used to calculate ground motions, the Maximum Considered Earthquake ground motions (MCER) along the Wasatch Front are significantly less than the ground motions that could be developed from a rupture of the Wasatch fault. Paleoseismic studies also indicate that the last rupture of several of the Wasatch segments occurred within a timeframe approximately bounded by their return periods. These circumstances present significant implications regarding the anticipated performance of buildings from a Wasatch fault rupture. Topics covered will include:

  • Wasatch fault
  • Code methodology
  • Probabilistic vs Deterministic
  • Southern California vs Wasatch Front 
  • Building performance when ground motions exceed MCER
  • Panel Discussion
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Christopher B. DuRoss

Speaker - Oral
The history of infrequent but large-magnitude earthquakes on the Wasatch fault zone
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Nicolas Luco, PhD

Speaker - Oral
International Building Code Ground Motions along the Wasatch Front
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Brent Maxfield

Session Organizer
International Building Code Ground Motions along the Wasatch Front
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Brent Maxfield

Session Organizer
Does the Building Code Adequately Protect the Wasatch Front Communities from a Wasatch Fault Earthquake?
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Craig Wilkinson

Speaker - Oral
An Assessment of Expected Seismic Performance of Buildings Subjected to Deterministic Ground Motions on the Wasatch Front
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Ivan G. Wong

Speaker - Oral
Time-Dependent Hazard Along the Wasatch Front and Implications to the Building Code

June 28, 2022 3:30 PM - 5:00 PM

S.S.10 Liquefaction: From Triggering to Societal Impacts

Where: Salt Palace: Ballroom C

Session Type: Special Session

The session comprised six presentations from a mix of academics and practitioners focused on liquefaction risk and risk mitigation, where the word 'risk' is used in the broadest sense, not in a strict mathematical sense. Additionally, the presenters ranged in the regions where they focus their efforts (e.g., active tectonic regimes to less seismically active regions). The specific topics covered include: issues in evaluating liquefaction triggering and risk, liquefaction hazard mapping, numerical analysis of liquefaction triggering and consequences, impact of liquefaction triggering on the built environment, mitigation of the risk of liquefaction, and societal impacts of liquefaction. The duration of the overall session was 90 minutes, and each presentation was 15 minutes in duration, to include time for questions and answers. The Session Organizers were Russell Green, Zia Zafir, and Kyle Rollins. The Session Moderator was Russell Green, and the presenters were Zia Zafir, Kevin Franke, Michael Beaty, Craig Davis, Shideh Dashti, Kyle Rollins, and Laurie Johnson. A mix of abstracts and full papers were submitted independently by the presenters for publication in the conference proceedings.

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Michael H. Beaty, PhD

Speaker - Oral
Numerical Analysis of Liquefaction Triggering and Consequences

Kevin W. Franke, PhD

Speaker - Oral
Reference Parameter Maps and Tools for Implementing Performance-based Liquefaction Hazard Assessment in Utah
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Russell A. Green, PhD

Speaker - Oral
Special Session: Liquefaction - From Triggering to Societal Impacts

Zia Zafir, PhD PE

Session Organizer
Special Session: Liquefaction - From Triggering to Societal Impacts
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Kyle M. Rollins, PhD PE

Session Organizer
Special Session: Liquefaction - From Triggering to Societal Impacts
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Laurie Johnson, PhD

Speaker - Oral
Societal Impacts and Consequences of Liquefaction

June 28, 2022 3:30 PM - 5:00 PM

S.S.11 CANCELED: User Needs for USGS National Seismic Hazard Models (NSHMs)

Where: Salt Palace: 150 G

Session Type: Special Session

The USGS is finalizing the hazard tools related to the recently developed 2018 NSHM and has initiated the development of the 2023 NSHM. As we look forward to the release of current hazard tools and development of future (2023 and beyond) NSHMs, we want to continue incorporating the best science and address engineering needs. An important topic that was considered in the 2018 NSHM update was developing hazard curves for Multi-Period Response Spectra (MPRS), which was recommended by the engineering users of the USGS NSHM and resulted in incorporating deep basin effects in four regions in the western U.S. Incorporation of basin effects and resulting site amplifications/de-amplifications continue to be important topics of discussions for the 2023 and future NSHMs. In the session, USGS scientists and engineers will first give short presentations on hazard tools available for users of the 2018 NSHM, summarize user needs for the 2023 and future NSHMs, and focus on one issue of basin effects implementation. An external panel of assembled experts will then share their opinions about the future of incorporating basin effects in the NSHM via a panel discussion.

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Peter Powers, PhD

Speaker - Oral
USGS NSHM Hazard Tool

Henry B. Mason, PhD

Session Organizer
User Needs for USGS National Seismic Hazard Models (NSHMs)

June 28, 2022 3:30 PM - 5:00 PM

S.S.12 Resilient Housing Ecosystem Assessment Tool and Strategies

Where: Salt Palace: 250 DEF

Session Type: Special Session

By 2030, about 40% of the world's population will be living without adequate housing.[1] Inadequate housing is disproportionately inhabited by the poor, putting those who are already vulnerable most at risk when earthquakes, windstorms, pandemics, and other shocks occur. There is an urgent need for more resilient (safe, healthy and affordable) housing. The barriers to overcome in the adoption of resilience housing at scale are grouped in three main categories: people/policy, money and technology. The Resilient Housing Ecosystem Assessment Tool (RHEAT) can be used to help countries, states, territories, and cities to identify key gaps and challenges in these three areas as they work toward achieving resilient housing at scale. This will be a two-part session, with the first part including an overview of the resilient housing ecosystem and the RHEAT as well as case studies from housing mitigation programs about the importance of addressing the three areas in scaling more resilient housing. The second part of the session will be mini-workshop on application of the RHEAT tool in which participants will be guided through the use of the tool in a group activity. [1] UN-Habitat, 'Housing,' accessed July 15, 2021, https://unhabitat.org/topic/housing

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Lizzie B. Collins, PE, SE

Speaker - Oral
Resilient Housing Ecosystem Assessment Tool and Strategies
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Annde Ewertsen, MBA

Speaker - Oral
Overcoming Barriers to Resilient Housing: Earthquake Brace + Bolt Program
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Louise Foulkes

Speaker - Oral
Resilient Housing Ecosystem Assessment Tool: Application and Methodology
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Elizabeth Hausler

Speaker - Oral
Overcoming Barriers to Resilient Housing: Colombia
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Oluwaseun Okusanya

Speaker - Oral
Resilient Housing Ecosystem Assessment Tool

June 28, 2022 3:30 PM - 5:00 PM

S.S.13 Seismic Risk Assessment Methodologies and Open-Source Tools for Natural Gas Infrastructure

Where: Salt Palace: 251 ABC

Session Type: Special Session

Two independent teams from the Pacific Earthquake Engineering Research (PEER) center and the University of California Los Angeles (UCLA) are currently working on multi-year studies to develop open-source seismic risk assessment tools for natural gas infrastructure for the California Energy Commission (CEC). This special session will share the current findings of the two research teams working on the CEC research effort. Their talks will focus on regional seismic risk assessments considering; ground motions analysis, non-ergodic hazard and directivity; liquefaction-induced lateral spreading; landsliding; fault displacement; fragilities of buried pipelines and above ground natural gas facility components; the value of sensing technologies in assessment of risk; improving run times through structured kernel interpolation; and examination of sensitivities of transmission and distribution pipelines in California. The insights gained will be applicable to similar natural gas infrastructure in other seismic regions in the world.

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Barry Zheng

Session Organizer
 
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Jennifer Donahue

Session Organizer
 

norman abrahamson

Speaker - Oral
Methods for Numerically Efficient Estimation of Seismic Risk for Distributed Systems
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Jonathan Bray, Ph.D.

Speaker - Oral
Impacts of Geo-Spatial Data Resolution on the Uncertainty of Liquefaction-Induced Displacement Estimates
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Peter G. Hubbard

Speaker - Oral
The value of sensing for performance-based earthquake engineering assessment of buried pipeline systems
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Barry Zheng

Speaker - Oral
Seismic Risk Assessment Methodologies and Open-Source Tools for Natural Gas Infrastructure
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Elide Pantoli, PhD, PE

Speaker - Oral
In-plane and Out-of-plane Cyclic Tests on Welded Steel Pipe Tee Joints
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Jennifer Donahue

Speaker - Oral
Seismic Risk Analysis of Natural Gas Infrastructure

Yousef Bozorgnia, BS, MS, PhD

Speaker - Oral
Seismic Risk Analysis of Natural Gas Infrastructure
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Nicholas Gregor

Speaker - Oral
Incorporating Hazard And Directivity Into A State-Wide Ground Motion Analysis

Linda Al Atik

Speaker - Oral
Incorporating Hazard And Directivity Into A State-Wide Ground Motion Analysis

Stephen Thompson

Speaker - Oral
Fault Displacement Hazard Initiative and Hazard Mapping for California
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Olaide Ojomo, PhD Candidate, PE

Speaker - Oral
Framework for Regional Geohazards for Risk Analysis of Distributed Infrastructure
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Jonathan P. Stewart, Ph.D., PE

Speaker - Oral
Framework for Regional Geohazards for Risk Analysis of Distributed Infrastructure
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Domniki Asimaki, Ph.D.

Speaker - Oral
Framework for Regional Geohazards for Risk Analysis of Distributed Infrastructure
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Jennifer Donahue

Speaker - Oral
Seismic Vulnerability of Natural Gas Pipeline Systems

Douglas Honegger

Speaker - Oral
Seismic Vulnerability of Natural Gas Pipeline Systems

Francois FA. Ayello, Dr

Speaker - Oral
Seismic Vulnerability of Natural Gas Pipeline Systems

Ali Mosleh, PhD

Speaker - Oral
Seismic Vulnerability of Natural Gas Pipeline Systems

Yousef Bozorgnia, BS, MS, PhD

Speaker - Oral
Seismic Vulnerability of Natural Gas Pipeline Systems

June 28, 2022 3:30 PM - 5:00 PM

T.S.12 Collapse and Vulnerability Assessment of Building Structures

Where: Salt Palace: Ballroom B

Session Type: Technical Topic Session

A diverse group of studies on assessing the vulnerability of different types of structures is featured in this session.

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Maha Kenawy

Moderator
 
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Carlos Arteta, PhD

Speaker - Oral
RC-FIAP: Open Platform for the Evaluation of the Structural Vulnerability of Reinforced Concrete Frames
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Anne M. Hulsey

Speaker - Oral
Decision-Making Based on the Risk of Building Collapse due to Aftershock Hazard and Post-Earthquake Damage
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Meredith T. Lochhead

Speaker - Oral
Multi-Hazard Performance of Informally-Constructed Puerto Rican Houses
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Kuanshi Zhong, PhD

Speaker - Oral
Site-specific Adjustment Framework for IDA (SAF-IDA) for Regional Earthquake Damage and Loss Simulation
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Henry Burton

Speaker - Oral
Collaborative Filtering-Based Collapse Fragility Assessment
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Geoffrey W. Rodgers, B.E. (Hons), Ph.D.

Speaker - Lightning Online Only
A Generalizable Nonlinear Finite Element Model to Predict Hysteretic Response Forces of Lead-Extrusion Damping Devices
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Diego Valdivieso Cascante

Speaker - Lightning Online Only
Monotonic and Cyclic Characterization of Multilayer Sheathing-to-Wood frame Connection
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Tung-Yu Wu, PhD

Speaker Online Only
Collapse Fragility of Steel Special Moment Frames with Initial Geometric Imperfections
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Jelena JP. Pejovic, PhD

Speaker Online Only
New Velocity Spectrum-based Intensity Measures For RC High-rise Buildings

June 28, 2022 3:30 PM - 5:00 PM

T.S.13 Hazards and Functional Recovery of High Occupancy Facilities

Where: Salt Palace: Ballroom D

Session Type: Technical Topic Session

This session will review the exposure to and performance of high occupancy facilities during natural hazard events and how functional recovery can look like for these facilities.

Abbie B. Liel, Professor

Moderator
 

Kristen Blowes

Speaker - Oral
Using Discrete Event Simulation to Evaluate the Post-earthquake Surge Capacity in Hospital Emergency Departments
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Luis Ceferino

Speaker - Oral
Hospital System Response to Earthquakes in the COVID-19 Pandemic
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Jasmine Gipson

Speaker - Oral
Developing a System Dynamics Framework to Provide Data-Driven Support to a COVID-19 Room Post-Earthquake

Abbie B. Liel, Professor

Speaker - Oral
Critical but Neglected: Analyzing the Exposure of Incarceration Infrastructure and Populations to Hazards Including Earthquakes
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Eyitayo Opabola

Speaker - Oral
Fostering Infrastructural Resilient Recovery in Displaced Communities via School-based hubs

Chi-Hao Lin, PhD

Speaker Online Only
Post-earthquake Patient Flow Simulation for Multiple Emergency Departments

June 28, 2022 3:30 PM - 5:00 PM

T.S.14 Performance of Nonstructural Components and Systems

Where: Salt Palace: 151 G

Session Type: Technical Topic Session

This session will focus on state-of-the-art laboratory testing of the performance of nonstructural components and systems subjected to extreme loads.

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Keri Ryan, PhD

Moderator
 
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Snehasagar Gopagani

Speaker - Oral
Finite Element Modelling for Seismic Damage Estimation of Suspended Ceiling Systems
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Louis Lin, MS

Speaker - Oral
System Identification of a Model NCS Supported with Flexible Base Connections
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William Roser

Speaker - Oral
NHERI TallWood 10-story Test Nonstructural, Part 2 of 4: Drift-Compatible Connections for Cold-Formed Steel Framed Exterior Walls
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Sir Lathan L. Wynn

Speaker - Oral
NHERI TallWood 10-story Test Nonstructural, Part 1 of 4: Project Overview and Curtain Wall Subassembly
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Shokrullah Sorosh

Speaker - Oral
NHERI TallWood 10-story Test Nonstructural, Part 4 of 4: Prefabricated Steel Stair Subassemblies
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Juin-Fu CHAI

Speaker - Lightning Online Only
Experimental Study on Splashing Volume of Storage Liquid in Tanks under Near-fault Ground Motions
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Venkatesh Patnana

Speaker Online Only
Sub-Assemblage Testing on Critical Connections of Continuous Plasterboard Suspended Ceiling Systems

June 28, 2022 3:30 PM - 5:00 PM

T.S.15 Advances in Performance Assessment of Structures III

Where: Salt Palace: 250 ABC

Session Type: Technical Topic Session

This is the third of three sessions featuring a wide array of studies on assessing the performance of structural systems and components subjected to extreme loading, with focus on predicting inelastic behavior and damage mechanisms.

larry fahnestock official

Larry Fahnestock

Moderator
 
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Rajesh Dhakal

Speaker - Oral
Experimental Validation of a Low-Damage Rocking Precast Concrete Cladding System
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Kathryn E. Hogarth

Speaker - Oral
An Innovative Double Beam Coupling Beam Incorporating Low Damage Seismic Technology
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Dipti Ranjan Sahoo, Ph.D.

Speaker - Oral
Experimental and analytical investigations on buckling restrained aluminum shear yielding devices under cyclic loading
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Codi D. McKee, M.S.

Speaker - Oral
Life-Time Structural Performance Assessment via Long-Term Time-History Analysis
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Anurag Upadhyay, MS

Speaker - Oral
Seismic Performance of Concrete Post-Tensioned Bridge with Fragility-Informed Seismic Design
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Larry Fahnestock

Speaker - Oral
Assessing the Effect of Design Variations on Seismic Stability of Steel Special Concentrically Braced Frames
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SHIH HO Chao, PhD

Speaker - Lightning Online Only
Toward Highly Resilient Concrete Columns for Earthquake-Resistant Structures Using Emerging Ultra-High-Performance Materials

June 28, 2022 3:30 PM - 5:00 PM

T.S.16 Novel Structural Systems and Low Damage Technologies I

Where: Salt Palace: 251 DEF

Session Type: Technical Topic Session

This is the first of two sessions featuring a diverse collection of studies on developing and testing novel structural systems and low-damage technologies.

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Lydell Wiebe

Moderator
 
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Morgan Broberg

Speaker - Oral
Seismic Design of Coupled Composite Plate Shear Walls – Concrete-Filled

Yin-Nan Huang, PhD

Speaker Online Only
In-Plane Cyclic Loading Experiment of Shear-Critical Steel-Plate Composite Walls with Axial Loading

zhi zhang

Speaker - Oral
Improving High-rise Steel Moment-resisting Frame Seismic Performance by Using Modular Hinged Wall with BRBs
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Mario Ortega

Speaker - Oral
Optimal Reduction of Seismic Floor Accelerations with Added Viscous Dampers
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Lydell Wiebe

Speaker - Oral
Experimental Investigation of Controlled Rocking Masonry Shear Walls without Posttensioning and with Energy Dissipation
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Wilson Carofilis

Speaker Online Only
Preliminary Analysis of a Hybrid Damper with Prestressed Iron-based Shape Memory Alloy Bars for Seismic Retrofitting

June 28, 2022 5:00 PM - 6:30 PM

10112 Effect of Accelerogram Processing, using Causal and Acausal Filters on 6-story and 9-story SAC Steel Moment-Resistance Frames

Where: Salt Palace: Hall A & 1

Session Type: Poster

With the development of computers and engineering software in recent decades, using nonlinear time history analysis to evaluate structures' seismic performance and seismic design has increased. Since noises always accompany the accelerograph data, raw accelerograms do not have an engineering application. Processing and correction of accelerograms are essential to analyze the structures, including instrument correction, baseline correction, and applying filters. In this study, based on the considered scenario, the accelerogram database has been prepared, including 43 far-field raw accelerograms (uncorrected); then, the effect of processing accelerograms with the use of causal and acausal filters on the 6-story and the 9-story SAC steel moment-resistance frames has been investigated. Incremental Dynamic Analyze (IDA) results reveal that acausal corrected accelerograms collapsed in less severity than the causal corrected accelerograms for the representative structures; therefore, acausal filtering gives more conservative responses than causal ones.

hamid 1. kazemi, Dr

Poster Presenter
Keynote Speaker

June 28, 2022 5:00 PM - 6:30 PM

10135 Experimental Investigation on Lateral Behavior of Light-Frame Shear Walls Augmented with Elastomeric Adhesives

Where: Salt Palace: Hall A & 1

Session Type: Poster

In this study, the effects of moderate to high-elongation elastomeric adhesives combined with nails between sheathing-to-framing connections on the seismic performance of light-frame shear walls (LFSWs) were experimentally investigated. Monotonic and cyclic tests were conducted on six specimens. Results reveal that adding adhesive increases strength significantly by (170~200%) and stiffness by (50~80%) and eliminates pinching and softening effects compared with the nails-only counterparts. Energy dissipation is doubled using high-elongation adhesive (i.e., 1000%), while a slight increase is observed in wall specimen using the moderate-elongation adhesive (i.e., 300%) due to the brittle wood substrates failure. As an indicator of energy dissipation through plastic deformations and ductility, the response modification factor of the high elongation adhesive shows a higher value (2.4~2.7) than the design value by the building codes (1.5). The results show the need to review the statement provisions restricting all adhesives in shear wall attachments. The low cost, ease of application, environment friendly, and efficiency of the elastomeric adhesives motivate expanding their structural applications to mitigate seismic damages.

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Bilal M. Alhawamdeh, Ph.D.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10175 Curing Incomplete Earthquake Catalog Data Using General-Purpose Ultra Data-Oriented Fractional Hot Deck Imputation

Where: Salt Palace: Hall A & 1

Session Type: Poster

This paper offers a new way for curing big incomplete earthquake catalog data to facilitate broad post-earthquake analyses. In the earthquake-related research community, various data such as decades-long earthquake catalogs are subject to missingness, and existing imputation (statistical data-curing theory) methods are not directly applicable due to large volume and difficult distributional assumptions. Ultra data-oriented parallel fractional hot-deck imputation (UP-FHDI) is general-purpose, assumption-free software for handling item nonresponse in big incomplete data by leveraging the theory of FHDI and parallel computing. We provide explicit procedures about the extraction of 25-year earthquake catalog datasets from USGS raw data and demonstrate the accuracy of UP-FHDI. Results confirm that UP-FHDI is capable of curing big incomplete earthquake catalog data with instances and variables without limitations to data volume and domain-specific knowledge. UP-FHDI outperforms naïve imputation (e.g., deletion or simple mean-based curing) that is popular in statistics and machine learning communities. This paper introduces the significance of UP-FHDI to the earthquake engineering community along with its positive impact on subsequent deep learning. All the software and data are shared for broad impacts.

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Yicheng Yang, Graduate Student

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10179 Seismic Performance of Precast Post-Tensioned Segmental Bridge Piers with Shape Memory Alloy (SMA) Bars

Where: Salt Palace: Hall A & 1

Session Type: Poster

In recent years, accelerated bridge construction (ABC) has led to substantial application of precast post-tensioned segmental (PPS) bridge piers in the bridge construction. However, PPS piers are not to be used in high-seismicity regions due to their low-energy dissipating capacity. To address this deficiency, this paper examines a segmental bridge pier with unbonded post-tensioned superelastic Shape Memory Alloy (SMA) bars through a Finite Element (FE) framework. The seismic performance of the PPS piers with SMA bars is investigated using far-field ground motions and incremental dynamic analysis (IDA). IDA curves of PPS piers are obtained for top drift and normalized base shear, and results are compared with the ones without SMA bars. It is seen that the PPS piers with SMA bars developed higher normalized base shear responses, which is mainly due to their higher stiffness compared to the ones without SMA. However, the PPS piers with SMA bars reduced the drift responses of the piers.

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Mohammed Mehdi Kashani, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10182 Effect of Uncertainties on Seismic Response of a Steel Moment-resisting Frame Affected by Sequence of Mainshock-aftershock Earthquakes

Where: Salt Palace: Hall A & 1

Session Type: Poster

The inherent uncertainties in the structural capacity and earthquake demand can significantly influence the performance of the structures under mainshock-aftershock sequences. In this regard, fragility models are robust tools for calculating cumulative damages considering uncertain parameters in both demand and capacity. However, there are some parameters that their uncertainties need to be examined together to determine how they might affect the fragility analysis of steel frames. Thus, uncertainties in parameters such as yield stress, seismic mass, and damping ratio are considered together for simulating the probabilistic response of 4- and 12-story steel moment-resisting frames under a suite of real mainshock-aftershock ground motions. The results indicate that medium-rise steel frames are more vulnerable to the risk of collapse under aftershocks following the mainshock than low-rise ones. Moreover, the effect of a different set of mainshock-aftershock sequences on the fragility functions implies that ground motion characteristics play a crucial role in estimating the probability of exceeding a damage state.

Georgios Balomenos, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10193 Water distribution network risk assessment and AI-aided repaid recovery under seismic hazard

Where: Salt Palace: Hall A & 1

Session Type: Poster

Water distribution networks (WDNs) are critical infrastructures that provide essential support for community life. The service of WDNs can be significantly interrupted under seismic hazards due to a large number of failures. The resilience of a WDN describes its ability to withstand the seismic as well as recovery from damage situations. This paper introduces a framework that simulates the failure and recovery process of WDN under the seismic and a machine learning (ML) model for resilient and rapid decision-making after the hazard. The simulation framework considered the water pipe location, WDN graph structure, pipe physical attributes, and dynamic customer water consumption. Based on the proposed simulation model, a reinforcement learning (RL) model is trained to obtain resilient decision-making after hazards. The results show that a reliable risk assessment and recovery simulation framework is the key for training a RL model. With the trained RL model, the optimal decisions post-hazard can be determined rapidly even the model has never seen this hazard before. This study demonstrates the potentials of artificial intelligence (AI) techniques to support the optimal decision in managing the WDN under emergency conditions.

Xiong Yu, Prof., Ph.D.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10199 Using Seismic Energy to Assess Structural Performance

Where: Salt Palace: Hall A & 1

Session Type: Poster

Buildings constructed in seismic regions are typically designed to sustain significant damage - but not collapse - during a major earthquake. Traditional linear design procedures use a force-based approach to size the building structural members. Alternatively, nonlinear performance-based design procedures use a displacement-based approach. However, neither of these procedures considers the dependance of component-level behavior on the loading history that is typically observed in the seismic response of structures. Seismic energy, which is a product of force and displacement, can reflect the structural behavior induced by the entire loading history. In this paper, a performance assessment method based on energy in structural components is explored. A moment-resisting steel frame is used to demonstrate the feasibility of this method by evaluating the seismic energy demand of the nonlinear plastic hinges and comparing it with the corresponding energy capacity determined from experimental data. The energy demand-to-capacity ratios at each plastic hinge are then evaluated to demonstrate the applicability of the seismic assessment procedure in practice and the advantages of using this approach, which may provide increased level of confidence in the seismic performance evaluation as compared to the level offered by force- or displacement-based methods.

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Kevin Wong

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10203 Extraction of Landslides in the Mw7.1 2021 Off-Fukushima Earthquake from ALOS-2 L-band SAR Intensity Images

Where: Salt Palace: Hall A & 1

Session Type: Poster

Remote sensing is useful to access damage situations due to natural disasters. In this study, Synthetic Aperture Radar (SAR) images acquired from PALSAR-2 sensor onboard ALOS-2 satellite were used to observe damage situations due to the 13 February 2021 Off-Fukushima, Japan, earthquake (Mw7.1). Landslides and rockfalls were reported at the Joban Expressway, a motor racing circuit, and seaside cliffs. Change detection using pre- and post-event PALSAR-2 intensity images was carried out and the results were compared with airborne optical images and field survey data. The landslide at the expressway and the motor circuit were recognized from the L-band SAR intensity data, but the rockfalls and other small-scale damages could not be identified due to the limitation of spatial resolution.

Fumio Yamazaki

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10239 Selection of GMPM for Subduction Zones in Costa Rica

Where: Salt Palace: Hall A & 1

Session Type: Poster

The selection of the Ground Motion Prediction Models (GMPM) is a key task for any seismic hazard analysis. The Interface and Intraslab subduction zones of Costa Rica are considered in this research. For the first time, a database with more than 1700 strong ground motion records, exclusively from Costa Rica, is used to check the model-data fitting. A set of GMPM is proposed for each seismic zone and weights for the logic tree analysis are proposed. The selection process and the assignation of weights uses the distribution and trends of the residuals, the likelihood, and the log-likelihood approach.

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Diego Hidalgo-Leiva, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10243 Hybrid Simulation Using Mixed Displacement and Equivalent-Force Control to Capture Column Shortening in Frame Structures

Where: Salt Palace: Hall A & 1

Session Type: Poster

A hybrid simulation approach is developed to analyze the system-level seismic response of a steel moment frame structure with an experimental subassembly with column shortening. Considering the high axial stiffness frames, the axial load is typically applied by force-controlled loading without consideration of displacement compatibility. To account for shortening, a new approach is proposed to control stiff axial degrees of freedom using an equivalent-force control method within the displacement-based framework for hybrid simulation. The column axial load on the experimental subassembly is imposed using force-controlled actuators based on the estimated axial force in the numerical model. The shortening in the experimental column is then measured and an equivalent force is returned and applied at the top of column node to impose a compatible shortening in the numerical model. The lateral degrees of freedom are applied using a substructuring strategy that considers the control points in the experimental setup. Numerical studies are carried out to demonstrate that force equilibrium and displacement compatibility at the top end of the buckling column can be achieved reliably using this approach.

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Claudio Sepulveda

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10246 Deep Reinforcement Learning Enabled Life-cycle Seismic Risk Assessment Considering Sequential Seismic Hazard And Intervention Actions

Where: Salt Palace: Hall A & 1

Session Type: Poster

By leveraging the advanced artificial intelligence technique, deep reinforcement learning (DRL), this study proposes a DRL-based adaptive sequential decision optimization and risk assessment methodology to synergistically account for the uncertainties from sequential seismic hazard, damage accumulation, and intervention actions. Based on the current system damage states, the proposed approach can offer optimal intervention action decision-support that minimizes the long-term cumulative direct and indirect costs. The efficacy of the proposed approach is examined based on a case-study five-component structural system considering sequential seismic hazard and different intervention actions over a prolonged time horizon. The results suggest that the proposed DRL-based decision-support tool can significantly reduce the life-cycle costs compared with a passive intervention policy, while also providing time-dependent seismic risk quantification to better inform the stakeholders about the highly stochastic consequences.

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Ao Du, Ph.D.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10257 Displacement-Control System for Seismic Isolation Equipped with High-Static–Low-Dynamic Stiffness and Rotational Inertia

Where: Salt Palace: Hall A & 1

Session Type: Poster

There have been increasing concerns about the occurrence of earthquakes. In particular, a displacement of seismic isolation may exceed their expected design range for long-period earthquake waves. In this paper, we propose a displacement-control system (DCS) that combines high-static-low-dynamic stiffness (HSLDS) and rotational inertia with conventional seismic isolation buildings. HSLDS suppresses the displacement of the seismic isolation layer, while rotational inertia contributes to extending the natural period of the building. To demonstrate the control performance of a DCS, we fabricated the DCS specimen and performed shaking table tests. From the experiments, frequency-resonance curve was obtained as the basic characteristic of the DCS. We determined that the DCS reduced the maximum displacement by half compared with the conventional seismic isolation building model for seismic excitations.

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Jun J. Iba, Master

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10282 Development of Image Sensing-Based Monitoring System for Suspended Piping Above Ceiling and Verification by Shaking Table Test Using Full-scale Steel Frame

Where: Salt Palace: Hall A & 1

Session Type: Poster

An autonomous image sensing-based monitoring system for suspended piping in buildings, especially for the non-structural members that are difficult to visually inspect, has been developed for the purpose of determining the usability of buildings immediately after disaster. We have built a multiple sensor unit with an infrared camera for capturing in the dark place and a MEMS accelerometer for triggering data collection. When analyzing the image data observed by proposed monitoring system, the residual deformation and the maximum displacement of suspended piping during the earthquake are estimated after correcting the depth direction influence according to the difference in the distance between the target points on the pipe and the camera. In this paper, the actually observed image data and its analysis results of applying the proposed monitoring system to the shaking table test of a full-scale steel frame structure are presented for the medical equipment and suspended piping above the ceiling. Although no major damages such as piping fracture occurred in the shaking table test, residual deformation of suspension bolts was detected from the difference image analysis, and the maximum displacement of the suspended piping during shaking was analyzed by the proposed image analysis method considering the depth influence correction.

Masahiro Kurata

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10284 Assessment on Economic Effect of Seismic Retrofit to RC School Building Considering Expected Damage

Where: Salt Palace: Hall A & 1

Session Type: Poster

Seismic retrofit is being carried out in school buildings to reduce damage by earthquakes. To decide seismic retrofit, it is necessary to assess the seismic effect in terms of structural safety and expected loss of seismic damage. The purpose of this study is to evaluate the economic effect of seismic retrofit using the expected cost ratio of the reinforced concrete (RC) school building reinforced with exterior steel braces. The RC moment-resisting frame with partial masonry infills was selected as a prototype structure of RC school buildings by investigating the architectural features and seismic details of school buildings. Four retrofit scenarios were selected according to the number of exterior steel braces and locations. The expected cost ratio derived the number of braces and damage of structural & non-structural component. The expected cost ratio of each retrofit scheme is compared by normalized seismic damage based on before retrofit. As a result, it is possible to quantitatively evaluate the effect of seismic retrofit. the minimum number of braces that satisfies structural performance may have a small effect of seismic retrofit. Assessment of economic effect using the expected cost ratio can be used as a decision-making tool for seismic retrofit.

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SangJin Hahn

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10288 Performance Enhancement of Masonry Arch Structure under Dynamic Loading using Engineered Cementitious Composites (ECC)

Where: Salt Palace: Hall A & 1

Session Type: Poster

Masonry arch structures was a popular form of construction in the ancient world. The behavior of these structures under dynamic loading is a relatively new field of study compared to its static load behavior. To protect these structures from design earthquake loadings, various strengthening techniques are being investigated. In this study, a numerical model of one-fourth scaled masonry arch was developed in Abaqus, and its performance was observed under sinusoidal impulse loading. To arrest the tensile forces in masonry, a layer of Engineered Cementitious Composites (ECC) was applied on the extrados of the masonry structure. A significant improvement in resisting the lateral impulse load was observed in the structure after the application of ECC.

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Rajat Mr. Avasthi, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10289 Seismic Resistance of Truss Moment Frame with Aluminum and Steel Core Buckling Braces

Where: Salt Palace: Hall A & 1

Session Type: Poster

The Buckling Restrained Knee Braced Truss Moment Frame (BRKB-TMF) is a novel seismic framing system with advantages of Buckling Restrained Braces (BRBs) and steel truss girders. In this study, a performance-based plastic design (PBPD) procedure has been modified using the energy correction factor ( ), which can be used to design BRKB-TMF irrespective of the type of BRB used. The truss members and columns are intended to be elastic, whereas BRBs are strategically arranged and engineered to disperse seismic energy by choosing an appropriate yield mechanism. A four-story prototype building with Aluminum and Steel core BRBs was designed using the modified PBPD procedure. The seismic performance was validated using pushover, nonlinear response history and incremental dynamic analyses. The pushover analysis showed that the inelastic activities were observed in BRBs and column base only. Furthermore, the fragility curves corresponding to 2/3 MCE and MCE levels were closer to each other indicating that the proposed design methodology is effective irrespective of the type of BRB used. The adjusted collapse margin ratio (ACMR) for the Aluminum and Steel BRB frames were obtained as 2.96 and 1.6, indicating better collapse resistance of the Aluminum BRB frame compared to the Steel BRB frame.

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Durgesh C. Rai, Professor

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10294 Influence of Statistical Approaches on Structural Collapse Potential Assessment

Where: Salt Palace: Hall A & 1

Session Type: Poster

Structural collapse estimation could be influenced by alternative statistical methods that can be chosen throughout the procedure of seismic risk assessment, specifically in the generation of collapse fragility functions. This study evaluates the impact of selecting different statistical methodologies on the collapse potential metrics of a reinforced concrete dual building subjected to subduction earthquakes. The explored methods are related to the identification and replacement of unusual observations in the simulated collapse data, and the selection of different probability functions (PFs) to characterize the collapse fragility. According to the results, the building showed an acceptable Life Safety risk in accordance with ASCE 7 targets, regardless of the PF. However, although passing the goodness-of-fit tests, the probability of collapse in 50 years obtained using the Weibull PF was 2.6 times the value obtained using the lognormal PF. The latter can be explained by the larger probability of collapse values exhibited by the Weibull PF, when compared to the lognormal PF, at small-to-medium Sa(T1) intensities that are associated with a higher mean annual frequency of exceedance. Therefore, the use of the Weibull PF led to larger collapse estimation metrics, which are dominated by these small-to-medium Sa(T1) intensities as corroborated by deaggregation analysis.

Marco F. Gallegos, Mr.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10299 A Global Earthquake Risk Map

Where: Salt Palace: Hall A & 1

Session Type: Poster

We create a global earthquake risk map that displays return times of ground motions that can damage seismically weak buildings. We assemble the Global Earthquake Model and in-house PSHA models, calculate hazard for 10 return times, and merge hazard curves near model boundaries. We produce a global site category model using primarily the geology proxy to account for site response. Structural damage functions are used to determine a ground motion threshold: a ground motion level that has a high probability of causing slight damage to seismically weak buildings and nonstructural components. By comparing the amplified ground motions at different return times to the threshold, we generate the global earthquake risk map that displays the return times of slight damage to these seismically weak systems.

Harold Magistrale

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10307 Nonstructural Component Attachments to Concrete with Post-Installed Expansion Anchors

Where: Salt Palace: Hall A & 1

Session Type: Poster

Earthquake damage to nonstructural components presents a life-safety risk for occupants and could introduce extensive financial losses and lead to extended downtime of the structure. Current code provisions specify lateral force demands and anchoring requirements aimed to limit the life safety hazard. The code demands are based on a simplified equation that accounts for some key parameters and does not fully consider the contribution of the component attachment. Similarly, most nonstructural numerical and experimental simulations include a fixed-based single-degree-of-freedom model, with nonlinear behavior incorporated within the component. Previous research suggests that the attachment design changes the boundary conditions and is an important parameter to determine the component dynamic properties. This paper presents an experimental test program of attachments connected to concrete with post-installed expansion anchors. The specimens were designed based on a shaking-table research program of generalized nonstructural components. The results illustrate the plastic mechanism and quantify the force-displacement relationships of the different attachment designs.

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Tal Feinstein

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10313 Parameter Optimization for Pivot Hysteresis Model of Reinforced Concrete Shear Walls with Different Failure Modes

Where: Salt Palace: Hall A & 1

Session Type: Poster

Reinforced concrete walls as the major vertical reinforced concrete members resisting lateral loading in the reinforced concrete structures located in seismic regions. Hence, the hysteresis behavior prediction of reinforced concrete walls is extremely important in seismic evaluation and design. Currently, the Pivot hysteresis model is used to predict the hysteretic response of members with parameters and representing the unloading stiffness and pinching, respectively, determined using the geometric and reinforcement details in column members. In this paper, an effort has been made to improve the existing approach for walls separately for flexure and shear modes of failure. The chosen variables to control and are axial load ratio, web reinforcement indices, boundary element reinforcement indices, and length-to-effective thickness ratio. Equations for and were calibrated through optimization of energy dissipation from 63 wall specimens subjected to cyclic loading, using an advanced optimization algorithm known as Simulated Annealing. The proposed formulations can improve the accuracy of the Pivot hysteresis model for wall members by capturing pinching and stiffness degradation more reasonably under different failure modes. The proposed approach can aid design engineers in performing a more reliable and accurate analysis of complex structures.

Yu-Che Ling, phD student

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10314 A Simplified Design Procedure for Steel Braced Frame Buildings with SMA-Based Self-Centering Dampers

Where: Salt Palace: Hall A & 1

Session Type: Poster

A simplified design procedure (SDP) is presented for steel braced frame buildings outfitted with superelastic shape memory alloy-based self-centering dampers (SCDs). The procedure is utilized to design two steel braced frame buildings with a target story drift of 1.5% at the design basis earthquake (DBE) level. The procedure is then validated through nonlinear dynamic analysis of the buildings under a suite of far-field ground motions scaled to the DBE and maximum considered earthquake (MCE) hazard levels. The results show that the median peak story drifts are within the target drift of 1.5% and 2% at the DBE and MCE levels, respectively. The median residual story drifts are negligibly small at both the hazard levels.

Chinmoy Kolay, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10319 New Orientation-Independent Measure Of Horizontal Ground Motion Intensity That Accounts For Directionality In Earthquake-Resistant Design

Where: Salt Palace: Hall A & 1

Session Type: Poster

Currently, design spectra in the U.S. are based on the spectral intensity occurring in the direction of maximum intensity at a site, usually referred to as RotD100. Using this definition for design is conservative because it implies that the orientation of maximum response coincides with one of the principal axes of the building. Other alternatives include the use of a measure of central tendency of the intensity at a site, such as the median spectral ordinate from those at all possible orientations, usually referred to as RotD50. However, most buildings have two horizontal principal axes that are orthogonal with respect to each other, and the design will be controlled by the maximum intensity in these orientations. Thus, this work proposes using the maximum between two orthogonal horizontal components at all non-redundant orientations and then taking the median value, referred to as MaxRotD50. Using a ground motion database of 5065 records, response spectra computed with MaxRotD50 are shown to be, on average, 16% higher than those computed with RotD50 and 6% lower than those computed with RotD100. Thus, the adoption of MaxRotD50 would result in a reduction of the ground motion intensities used for design.

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Alan Poulos

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10322 Moment-Curvature Analysis for Deformation Capacity of Reinforced Concrete T-Shaped Walls with High-Strength Steel

Where: Salt Palace: Hall A & 1

Session Type: Poster

Recent experimental tests of concrete walls have shown that walls reinforced with high-strength steel (HSS), Grade 80 (550 MPa) or more, exhibit similar deformation capacity to walls with conventional Grade 60 (420) reinforcement. Moment-curvature analyses were conducted to support the development of closed-form solutions for estimating the deformation capacity of walls. The proposed formulations include deformations due to flexure, shear, and strain penetration. The methodology was evaluated using test data of T-shaped walls reinforced with HSS.

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Erick A. Burgos, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10328 Fostering Structural Earthquake Engineering on Early Years College Students through Field Damage Observations and Fiber-Based Simulations

Where: Salt Palace: Hall A & 1

Session Type: Poster

Because of the already crowded civil engineering curriculum and the amount of previous knowledge required, earthquake engineering topics are barely taught at the undergraduate level and is mostly reserved as an advance course in graduate school. In this article we show how we engaged fiber-based simulations along with field damage observations from the 2020 southwest Puerto Rico earthquake sequence to introduce early year college students from different academic backgrounds into structural earthquake engineering. It was found that fiber-based modeling provides a natural way of modeling civil structures and offer results that can be easily related with the expected/observed damages, making it an efficient tool to introduce key aspects of the structural seismic response and motivate early year college students to pursue further studies in this field.

Luis A. Montejo, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10336 Seismic risk of soft-story structures rehabilitated with control systems in Mexico City

Where: Salt Palace: Hall A & 1

Session Type: Poster

This study discusses the seismic risk of typical existing low-and medium-rise dwelling structures with a soft-story rehabilitated with control systems for seismic protection at their soft first-story during earthquakes in Mexico City. These structures are subject to seismic motions representative of seismicity in Mexico City. The seismic response, fragility functions, and maximum interstory drift ratio demand risk were examined for three types of configurations, namely: (1) structure simple supported on solitary columns; (2) structure rehabilitated with viscous dampers; and (3) structure rehabilitated with buckling restricted braces. These results should aid designers in the selection of appropriate configurations or mitigation measures for a structure with open soft first story in earthquake-prone regions, such as in Mexico City. Further, the results of this study conclude that the structural reliability of the structures with control systems at their first story is higher than structure simple supported on solitary columns in Mexico City.

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Valentin Juarez

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10337 High-Rise Reinforced Concrete Buildings Retrofitted Using Steel Double K-Braced Frame and One-Sided Shear Strengthening Schemes

Where: Salt Palace: Hall A & 1

Session Type: Poster

This paper presents the seismic evaluation of using a steel double K-braced frame and one-sided shear retrofit schemes to retrofit existing reinforced concrete (RC) social buildings in Banqiao district, Taiwan. A total of 37 social buildings showed minor damage in 2015 Hualien Earthquake with a magnitude of 6.3. The steel K-braced frame and the one-sided shear retrofit schemes were used to enhance the shear strengths of short columns and coupling beams, respectively. Cyclic tests were conducted on a full-scale steel double K-braced frame specimen and three RC beam specimens. Two beam specimens were retrofitted by an increased cross section and a bolted steel plate from only one side of the RC beam, respectively. The double K-braced frame failed due to significant buckling of braces and frame elements at 3% drift. Two retrofitted beam specimens exhibited shear failure at 4% drift cycle, and then concrete crushing associated with longitudinal bar buckling in the plastic hinge region. These retrofit schemes were verified to enhance the shear strength of RC columns and beams to meet seismic demands of the buildings, obtained from nonlinear time-history analyses of a frame.

Chung-Che CHOU

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10364 Interdisciplinary Undergraduate Research Experience for Earthquake Engineering Education

Where: Salt Palace: Hall A & 1

Session Type: Poster

On January 7, 2020, the southwest of Puerto Rico was struck by a M6.4 earthquake that caused the collapse of several structures, including a 3-floor operational reinforced concrete school. While it is well known that the island is located on an active seismic zone, this event took by surprise and unprepared the affected communities, as the last significant earthquake dated 1918 and most attention in the island is directed towards recurrent tropical cyclones hazards. This event offers a unique opportunity to promulgate an earthquake awareness culture in the community and promote earthquake engineering within our students. This paper presents an undergraduate research case study where the students designed a vertical evacuation structure for a coastal community in Mayaguez, PR. The group was comprised of undergraduate students with different academic background: civil engineering, surveying and architecture. The objective was to foster interdisciplinary problem-solving skills and advance the knowledge of earthquake engineering principles in the students. The results from the project proved that when students from different background and perspectives work together, the solutions that arise are holistic and the knowledge acquired is deeper and better rounded.

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Aidcer L. Vidot-Vega, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10389 Lateral Seismic Load Behavior and Design of Coupled Composite Plate Shear Walls / Concrete-Filled (CC-PSW/CFs)

Where: Salt Palace: Hall A & 1

Session Type: Poster

Coupled composite plate shear walls / concrete filled (CC-PSW/CFs), also known as the SpeedCore system, are being used as a distinct lateral load resisting system for the seismic design of mid- and high-rise buildings. In this paper, the seismic design philosophy of CC-PSW/CF is briefly presented, which is based on using strong C-PSW/CFs and weak coupling beams. The coupling beams are sized for code-level seismic forces to yield before flexural yielding of C-PSW/CFs at the base. The C-PSW/CFs are designed for amplified seismic forces corresponding to plastic hinge formations in all coupling beams. Nonlinear static pushover and dynamic time-history analyses were conducted on a 12-story CC-PSW/CF structure to evaluate the lateral seismic load behavior of the system. In accordance with static pushover and dynamic time-history analyses, CC-PSW/CFs designed according to the proposed seismic design procedure undergo the following milestones: (a) flexural yielding of coupling beams, (b) flexural yielding of C-PSW/CFs at the base, (c) propagation of yielding, (d) fracture initiation of coupling beams, (e) fracture initiation of C-PSW/CFs at the base, (f) total fracture of some coupling beams.

Soheil Shafaei, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10400 Impacts of Cascadia Subduction Zone M9 Earthquakes on Bridges in Washington State: SDOF Idealized Bridges

Where: Salt Palace: Hall A & 1

Session Type: Poster

The Cascadia Subduction Zone has the potential to generate magnitude 9 earthquakes that could have large impacts on bridges throughout the western portion of the Pacific Northwest. Using a database of key structural properties of 609 highway bridges in the Puget Sound region, bridges were idealized as single-degree-of-freedom systems. These SDOFs were then subjected to a suite of simulated, soil-adjusted, magnitude 9 ground motions at ten locations around Washington State. Bridges in the database were found to be significantly stronger than what would be expected from minimum design requirements, even after accounting for material overstrength. As a result, many bridges performed better than expected. Bridges located on the Pacific Coast showed moderate levels of predicted ductility demand between periods of 0.5 and 1.5 seconds, with up to 75% exceeding ductility demands of 2. For inland cities located on sedimentary basins, such as Seattle, bridges with periods between 1 and 3 seconds were highly likely to exceed ductility demands of 2, and up to 50% exceeded ductility demands of 3.5. Bridges in inland cities away from basins were predicted to have low ductility demands across all periods.

Zachary Kortum

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10401 Multi-Directional Real-Time Hybrid Simulation Study of Rolling Pendulum Isolation Systems for Seismic Risk Mitigation of Critical Building Contents

Where: Salt Palace: Hall A & 1

Session Type: Poster

Damage caused by earthquakes to buildings and their contents (e.g., sensitive and critical equipment) can impact life safety and disrupt business operations. The resulting social and economic losses can be minimized if the seismic demands on building contents are reduced through vibration isolation. In this regard, floor isolation systems (FIS) are a promising retrofit strategy for protecting vital building contents. Therefore, this paper presents an overview of an ongoing research effort, which consists of real time hybrid simulation (RTHS) tests of FISs on a multi-axial shake table conducted at the Natural Hazards Engineering Research Infrastructure (NHERI) Experimental Facility at Lehigh University. Multi-directional RTHS is utilized to validate the performance of full-scale rolling pendulum (RP) bearings, incorporating multi-scale (building-FIS-equipment) interactions. Parametric variation includes the influence of different steel moment resisting frame (SMRF) configurations, each subjected to ground motions of different sources and hazard levels. Details of the experimental test set-up, RTHS test protocol and main results on the multi-directional testing of an RP-based FIS are described. Challenges in conducting the multi-axial RTHS, like kinematics transformation and compensation for inertial effects, are also discussed, along with the approaches used to overcome them.

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Esteban Villalobos Vega, M.S.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10408 The Use of Low-Cost Seismic Sensors to Enhance Post-Earthquake Situational Awareness, Emergency Response, and Engineering Inspection

Where: Salt Palace: Hall A & 1

Session Type: Poster

The development of low-cost, seismic sensors adds a new alternative to the use of costly, hardwired seismometers installed as part traditional strong motion networks. Multidirectional MEMS accelerometers capable of running on very low power and of transmitting data through standard cellular networks provide near real-time information to web-based platforms, which, in turn, can provide building owners with immediate situational awareness of building performance following an earthquake. They also allow owners of multiple buildings to triage and prioritize response, and produce time history, response spectra and frequency measurements that can aid engineers in identifying likely damage locations within a building. Combined with third party or custom engineered building damage functions, preliminary estimates of damage can be made within minutes of an event, and can be used to prioritize emergency response. Sensors installed in a Salt Lake City high-rise captured data from aftershocks of the 2020 Magna Earthquake, and will aid the owner's emergency response and recovery teams in future events.

 evan reis

Evan Reis, SE

Speaker Online Only

June 28, 2022 5:00 PM - 6:30 PM

10411 A Generalized Ground Motion Model for consistent Mainshock-Aftershock Ground Motion Intensity Measures using Deep Neural Networks

Where: Salt Palace: Hall A & 1

Session Type: Poster

Utilization of 'consistent' mainshock (MS) - aftershock (AS) ground motions is desirable in practical engineering applications. Such consistency in selecting MSAS sequences requires proper consideration of the correlations between and within the intensity measures of MS and AS ground motions. This study proposes a generalized ground motion model (GGMM) to estimate consistent 30×1 vectors of intensity measures for mainshocks (denoted as IMMS) and aftershocks (denoted as IMAS) using a framework of successive long-short-term-memory (LSTM) recurrent neural network (RNN). The vectors of IMMS and IMAS consist of geometric means of significant duration (), Arias intensity (), cumulative absolute velocity (), peak ground velocity (), peak ground acceleration (), and RotD50 spectral acceleration () at 25 periods for both MS and AS ground motions. The proposed RNN-based framework is trained on a carefully selected set of ~700 crustal and subduction recorded MSAS sequences. The inputs to the framework include a 5×1 vector of source and site parameters for mainshock and aftershock recordings. The residuals of the trained LSTM-based RNNs are further used to develop empirical covariance structures for IMMS and IMAS.

Jawad Fayaz

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10434 Ground Motion Models for Northern South America

Where: Salt Palace: Hall A & 1

Session Type: Poster

The recorded spectral accelerations at long periods in Northern South America are on average overpredicted by global ground-motion models (GMMs). This misfit between the estimated and recorded ground motions varies per tectonic setting, larger for the subduction tectonic environments (Intra-slab and Interface). The complete Colombian ground-motion database comprises 6871 records from crustal, interface, and intra-slab earthquakes and includes events from Ecuador. The earthquake magnitudes range is 4.0 <= Mw <= 7.8 range and hypocentral depth up to 200 km. The site characterization is based on the fundamental period of the soils, using the HRVSR spectrum. The proposed ground motion models are regionalized versions of the global ASK-14 and AG2020 ground motion models for crustal and subduction earthquakes, respectively. With this regionalization, the large-magnitude scaling and the short-distance attenuation are controlled by the global GMMs. The scaling for the moderate magnitudes and the region-specific damping along the ray path(Q) are controlled by the regional GMMs. Further, the ground motion models presented herein account for the added damping at backarc sites. Examples of response spectra and scaling with distances are included, and a downloadable spreadsheet is referenced.

carlos arteta

Carlos Arteta, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10439 Relationship between Seismic Redundancy and Failure Likelihood for Mass-eccentric Reinforced Concrete Frame Structures

Where: Salt Palace: Hall A & 1

Session Type: Poster

Any change in structure's occupancy or use can significantly impact the plan and elevation mass distributions, turning even regular structures into mass-eccentric structures with in-plan or vertical irregularities. Generally, irregular structures are more vulnerable to earthquake hazards because of the torsional effect, which causes non-uniform deformation demands. Existing design practices propose that irregular structures should be subjected to stringent design criteria. This research investigates how the use of a structure can affect its seismic vulnerability and tries to find how seismic demand and supply are related to failure probabilities. A series of reinforced concrete moment frames structures with varying in-plan and vertical irregularities are studied. Their 3D detailed analytical models are employed for numerical simulations. In fragility analysis, a relationship between the limit state function (seismic supply minus demand) and failure probability is derived. Previous research efforts mainly focus on investing seismic supply and demand for various structures by conducting vulnerability analysis. However, this study aims to derive how the seismic redundancy expressed by a limit state function relates to the structural failure likelihood.

amr ghanem

Amr Ghanem, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10442 Optimal Sensor Placement for Seismic Damage Diagnosis Leveraging Thompson Sampling and Deep Generative Bayesian Statistics

Where: Salt Palace: Hall A & 1

Session Type: Poster

The number of instrumented buildings is rising, and seismic excitations are being monitored across the nation. Processing vibration data from these accelerometers is critical for effective seismic damage diagnosis. Optimal Sensor Placement (OSP) plays a vital role in extracting damage-sensitive data, minimizing the number of necessary instruments, and reducing maintenance costs. This study will investigate the OSP problem by transferring the Bayesian optimization into a lower-dimensional latent space using Conditional Variational Auto Encoder (CVAE). After a one-time CVAE calibration, the sensor configurations are encoded into a latent representation. The latent vector that maximizes the acquisition function is decoded as the next candidate sensor layout evaluated for seismic damage diagnosis. Black-box objective function evaluations for a suite of ground motions can be computationally expensive. Therefore, Thompson sampling is proposed for the online selection of the acquisition function as an optimization hyperparameter. A 2D 9-story reinforced concrete moment frame subjected to 10,800 nonlinear response history analyses is used in validation studies to find an optimized sensor layout for a deep learning model that predicts structural damage severity. It is observed that using the optimal configurations, the number of accelerometers can be substantially reduced while achieving similar damage detection accuracy.

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Xiao Liang

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10451 Influence of Uneven Scour Depths on the Performance of Bridges under Near-Fault Ground Motions

Where: Salt Palace: Hall A & 1

Session Type: Poster

This study investigates the seismic performance of a bridge located at a site where the scour depths at adjacent bents considerably vary. The bridge is assumed to be subjected to a near-fault ground motion, which is devastating to bridges suffering from riverbed scouring. The effect of uneven scour profiles on the displacement demand imposed on the column and the foundation is particularly emphasized in this study. The displacement responses of the columns and foundations during an earthquake are simulated through nonlinear time-history analysis and compared with the deformations associated with the yield and ultimate limits. Results of the analysis emphasize that the overall displacement of the superstructure substantially increases despite the occurrence of riverbed scouring only in some bents. The interaction between bents with different scour depths reduces the foundation displacement of the bents with extensive scour depth but increases the column displacement of the bents with shallow scour depth. Despite the fact that bridge engineers may worry the seismic performance of the foundations with extensive scour depth, the columns of the bents with shallow scour depth are likely to experience unexpected damage.

Shin-Tai Song, Dr.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10453 Buckling-Restrained Braces in Seismically Deficient RC Frames and RC Special Moment Frames

Where: Salt Palace: Hall A & 1

Session Type: Poster

Since their first use in 1989, buckling-restrained braces (BRB) have proven to be an efficient hysteretic energy dissipation device for resisting seismic events; however, limited research has been dedicated to their application in reinforced concrete (RC) structures. Quasi-static cyclic experiments and accompanying numerical analyses were conducted on two RC frames: one simulating a seismic retrofit and the other a modern seismic code-compliant new-construction scenario. Both RC frames utilized a single diagonal BRB aimed at increasing the strength, stiffness, and hysteretic energy dissipation capacity of the frames. In both scenarios, the RC frame was tested until rupture of the BRB core, at which point the BRB was removed and the RC frame was tested alone to obtain the residual capacity of the frame. From the experiments and nonlinear numerical analyses, it was found that addition of a BRB was effective in increasing the strength, stiffness, and total hysteretic energy dissipation capacity of the original RC frames in both the seismic retrofit and modern seismic code application.

Jacob Dunn

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10469 Site-Specific Ground Motion Response Spectrum for Seismic Design and Evaluation of a Near-Fault Site in Taiwan

Where: Salt Palace: Hall A & 1

Session Type: Poster

A methodology was developed for a site-specific Ground Motion Response Spectrum (GMRS), considering a near-fault effect on a site in Taiwan. First, appropriate source parameters and reference rock site condition are defined according to the available geological and geophysical information about the target site and the nearby fault. Secondly, the Ground Motion Response Spectrum for a reference rock site (GMRSref) is developed through empirical approach by using a ground motion prediction equation (GMPE) as well as a theoretical approach by using ground motion simulation (GMS) technique simultaneously for the theoretical site-specific site response analysis. The effect of near-fault pulse like ground motion on the GMRSref is also evaluated including the pulse period, occurrence probability and its impact on the response spectrum. Third, the site-specific site amplification is developed through an empirical site amplification analysis from the horizontal-to-vertical Fourier spectral ratio (HVR) of the target site measured from the microtremor as well as the theoretical site response analysis. Seismic design and evaluation can be conducted to evaluate the impact of the fault on the target site structure by using the proposed methodology.

Chih-Hsuan Sung

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10513 Predictive Models for the Cyclic Response of Moment Connections with Steel Angles and Shape Memory Alloy Bolts

Where: Salt Palace: Hall A & 1

Session Type: Poster

Self-centering systems are effective in minimizing residual deformations in the structure and consequently reducing the repair costs following a seismic event. This paper proposes the procedure of developing surrogate models to characterize the cyclic response of new self-centering beam-to-column connections with Shape Memory Alloy (SMA) bolts and steel angles. First, a three-dimensional finite element model of the connections is developed and validated using a prior experimental study. Next, the Response Surface Method (RSM) is used to develop factor combinations. For each factor combination, a finite element model is developed and analyzed. Next, finite element analyses and statistical analyses of response parameters are used to develop surrogate models. The developed surrogate models can accurately predict the cyclic and self-centering response of beam-to-column connections. The coefficients of determination for the developed surrogate models range from 0.90 to 0.99. The developed surrogate models are useful for the performance-based seismic design and design optimization studies by reducing the runtime significantly in practical applications.

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Majid Mohammadi Nia, PhD Candidate, MASc, BASc

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10519 Dynamic Behavior of Unbonded Fiber-Reinforced Elastomeric Isolators

Where: Salt Palace: Hall A & 1

Session Type: Poster

Unbonded fiber-reinforced elastomeric isolator (UFREI) is a valuable substitute to the conventional elastomeric isolators for seismic base isolation purpose. The use of fiber-reinforced polymer sheets in place of steel reduces the cost of the isolation system considerably, thus making it affordable to a variety of low-cost construction projects. Moreover, the unbonded nature of the isolator makes it more flexible as its horizontal displacement increases. The dynamic behavior of the UFREIs is well researched on, however the change in its behavior due to variation in the isolator properties are yet to be comprehended fully. The effects of changes in the geometric or material properties of the UFREI on their dynamic behavior is presented here. A three-dimensional (3D) numerical model is developed and validated with results reported in the standard literature and subsequently, finite element analysis of the UFREI is carried out. It is concluded that the effective stiffness and damping of the UFREI is highly sensitive to the aspect ratio of the isolator.

prof vasant matsagar

Vasant A. Matsagar, Ph.D.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10528 Development of an Objective Fatigue Model for HSS Braces

Where: Salt Palace: Hall A & 1

Session Type: Poster

To dissipate energy, steel braces in concentrically braced frames are expected to sustain large deformations due to yielding in tension and global buckling in compression. However, during seismic events, braces can experience very large strain demands that can lead to brace rupture. Thus, characterization of behavior and evaluation of braced frame performance depends on adequately simulating force re-distributions following both buckling and fracture of the brace elements. The fracture of braces due to fatigue has been estimated by using the Coffin-Manson relationship and Miner's rule to evaluate the accumulation of damage based on deformation histories. Typically, this model for low-cycle fatigue is considered only at the material level. However, when using force-based beam-column elements, strains at the material level can be nonobjective and depend on the numerical model inputs. Therefore, using the same fatigue model with different numerical modeling parameters for the brace does not always produce consistent results. In contrast, deformations at the element level are little affected by the numerical model inputs. An objective fatigue model based on deformations at the element level is developed to calculate damage and fracture in brace elements. Results are compared to similar fatigue models implemented at the material and section levels.

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Akiri Seki

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10565 Displacement-Strain Transformation Matrix Updating For Earthquake Simulation Studies And Damage Localization

Where: Salt Palace: Hall A & 1

Session Type: Poster

Unlike the updating of mass and stiffness matrices, the updating of the displacement-strain transformation matrix has not received much attention over the years. This study achieves the updating of the displacement-strain transformation matrix by combining the data obtained from acceleration and strain sensors. An error function, which is formed from the data, is minimized. Since the updated transformation matrix better represents the actual structure, it can provide more accurate strains in earthquake simulation studies. Once an updated transformation matrix is obtained, only acceleration data are necessary to localize the damage, and strain data acquisition is not required, thereby reducing overall health monitoring costs. In addition, it will also reduce the data storage burden. The proposed health monitoring scheme can be used for localizing damage in a structure situated in earthquake-prone areas. The updating procedure is illustrated by using the experimental data acquired from a four-story shear building laboratory model.

adarsh

ADARSH S, MTech, Ph.D. (Pursuing)

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10568 Continuum Finite Element Simulation of Self-Centering Beam-to-Column Connections using ANSYS

Where: Salt Palace: Hall A & 1

Session Type: Poster

Self-centering systems can prevent permanent damage to the structure and reduce downtime and repair costs following a seismic event. This paper presents the development and experimental validation of detailed three-dimensional finite element (FE) models of two different types of self-centering beam-to-column connections using ANSYS Mechanical APDL. The connection types considered herein are extended endplate connections with Shape Memory Alloy (SMA) bolts and beam-column connections with combined SMA bolts and steel angles under cyclic loading. The FE modeling details, including material properties and geometrical nonlinearities, contacts between solid surfaces, and the application of pretension loads, are discussed. Practical solutions to avoid numerical convergence challenges and meshing difficulties are presented along with details to reduce computational running time. Ten FE models are developed and experimentally validated using three extended endplate beam-to-column connections with SMA bolts and seven beam-to-column connections with steel angles and SMA bolts. The hysteretic response of the connections is verified based on experimental results. An excellent agreement between the FE results and experimental results is obtained.

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Majid Mohammadi Nia, PhD Candidate, MASc, BASc

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10574 Earthquake Ground Motion Generator for South Carolina

Where: Salt Palace: Hall A & 1

Session Type: Poster

South Carolina (SC) is one of the seismically active states in the central and eastern US, and there is a need for calculating the site-specific hazards for the design of civil infrastructure systems. In this paper, the capabilities of a new ground motion generator that is being developed considering the local seismic and geological conditions are presented. The program uses the Central and Eastern United States Seismic Source Characterization (CEUS-SSC) and NGA-East ground-motion models to construct site-specific uniform hazard spectra (UHS) and deaggregation results. It is configured to use either actual ground motions from the PEER database or generate a synthetic ground motion using the point-source stochastic model of Atkinson and Boore [1]. For the modification of the input motion, time and frequency domain techniques are implemented. The program can produce an acceleration time histories by matching the complete UHS or a specific period of interest. The program can generate the ground motion for a reference outcrop or hard rock conditions. The software has a graphical interface to view the results and special features to post-process them. Hence, this special-purpose software package is helpful for engineers to calculate seismic hazards accurately and design resilient infrastructure systems in a cost-effective manner.

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Vishnu Saketh Jella

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10606 Influence of Earthquake-Tsunami Sequence Induced Corrosion on Residual Seismic Capacity of Concrete Structures

Where: Salt Palace: Hall A & 1

Session Type: Poster

Field investigations have highlighted the high likelihood of chloride ingress in reinforced concrete (RC) buildings submerged by seawater and covered by mud during an earthquake-tsunami (EQ-TS) sequence. Chloride attack through EQ-induced cracks or spalling can cause a high corrosion rate in the reinforcement, thereby compromising the long-term durability of the structure and its performance in future events. Typically, this deterioration process is neglected when assessing the future performance of frame structures in tectonically-active coastal regions. This study demonstrates the influence of EQ-TS-induced corrosion on the residual seismic capacity of modern RC frame structures. The analyses show an undesirable component-level failure mode switch to a shear-dominated mechanism. The median collapse fragility of the frame is also seen to be significantly influenced by the reinforcement corrosion. The outcome of this study raises questions on the post-tsunami management of both modern and older-type RC frame structures

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Eyitayo Opabola

Speaker - Lightning Online Only

June 28, 2022 5:00 PM - 6:30 PM

10609 Impact of Detailing on the Lateral Performance of Cold-Formed Steel Framed Walls

Where: Salt Palace: Hall A & 1

Session Type: Poster

The main objective of this study is to investigate the impact of structural and non-structural detailing that is not directly accounted for in conventional lateral strength and ductility design of wall-lines constructed of cold-formed steel (CFS) framed steel sheet shear walls. A key structural detail that commonly occurs in wall-lines, but not in shear wall testing, is the presence of a heavy ledger track attached along the top of the wall, as this facilitates connection of the floor system with the wall. A key non-structural detail, which will impact the wall-line's lateral performance, is the presence and type of finish system (e.g., gypsum board). Herein, a numerical study employing OpenSees is validated and exercised on wall-line models with or without ledger tracks as well as with or without finish. Modeling results predict the degree by which both strength and ductility of wall-lines increase due to the presence of a ledger track and/or finish system. The strength increase can be attributed to the engagement of ledger track-to-stud connection moment resistance and additional direct shear resistance provided by an applied finish layer. The developed OpenSees model is able to capture the impact of detailing and can be incorporated into building-level simulations.

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Zhidong Zhang

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10623 Summary of a New Net Fault Displacement Model

Where: Salt Palace: Hall A & 1

Session Type: Poster

We present preliminary results for a new fault displacement model to predict the total discrete net displacement across complex fault surface ruptures as a function of magnitude and position along the rupture length. The model is applicable to shallow crustal earthquakes for all styles of faulting. The strike-slip and reverse models are based on data between M 6.0 to 7.9 and 5.0 to 8.0, respectively, whereas the normal-faulting model is only based on data between M 6.5 to 7.6. The model was developed using Bayesian regression analysis on data from 65 earthquakes in the new FDHI Project database. The Bayesian approach robustly captures uncertainty and variability, making our model well-suited for use in probabilistic fault displacement hazard analyses.

Nicolas M. Kuehn

Poster Presenter
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Albert Kottke

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10627 Data-driven moment-curvature relationship modeling of corroded bridge columns using machine learning

Where: Salt Palace: Hall A & 1

Session Type: Poster

Aging effects and related corrosion issues have been recognized as a major concern for the durability and sustainability of bridges. Moreover, bridges have been reported increasingly susceptible to extreme events (e.g., earthquakes) during their service life in the evolving built and climate environment. It is thus important to assess the capacity degradation of bridge key components such as columns under corrosive environments for reliable lifetime risk assessment. In this study, a machine learning-aided framework is proposed for time-dependent probabilistic capacity modeling of deteriorating reinforced concrete (RC) bridge columns under chloride-induced corrosion. To this end, a comprehensive database of circular sections' moment-curvature relationships with multi-level limit states is generated using OpenSeesPy considering multi-source uncertainties in the corrosion process, as well as the uncertain geometrical and material properties of the bridge columns. Artificial Neural Network models are then developed using a database for rapid estimation of deteriorating column capacity. The results demonstrate that the proposed framework for reliable and computationally efficient estimation of seismic capacity of deteriorating RC bridge columns.

Bo Xu

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10636 Structural Reliability Assessment for Reinforced Concrete Bridges under Seismic Loadings

Where: Salt Palace: Hall A & 1

Session Type: Poster

This work shows simplified closed-form expressions that allow to estimate the structural reliability expressed in terms of the failure rates and confidence factor considering a normalization index of structural demand and capacity, IDC. The approach shown in this paper is compared with the approach that does not consider the variables of structural demand and structural capacity as normalized variables. It is considered the stochastic variability of seismic occurrence through synthetic seismic records associated with the study site. The application example is performed on a reinforced concrete bridge located in soil type III transition zone of Mexico City. The bridge of study is designed to perform a drift ratio of 0.003. The uncertainties of the geometric and mechanical properties of the bridge are considered. Recommendations about design are made based on structural reliability indicators.

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Ricardo B. Flores, MSc, MSc

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10638 Seismic Response of Yielding Structures Coupled to Rocking Walls with Supplemental Damping

Where: Salt Palace: Hall A & 1

Session Type: Poster

Given that the coupling of a framing structure to a strong, rocking wall enforces a first-mode response, this paper investigates the dynamic response of a yielding single-degree-of-freedom oscillator coupled to a rocking wall with supplemental damping (hysteretic or linear viscous) along its sides. The full nonlinear equations of motion are derived, and the study presents an earthquake response analysis in term of inelastic spectra. The study shows that for structures with preyielding period T1<1.0 s the effect of supplemental damping along the sides of the rocking wall is marginal even when large values of damping are used. The study uncovers that occasionally the damped response matches or exceeds the undamped response; however, when this happens, the exceedance is marginal. The paper concludes that for yielding structures with strength less than 10% of their weight the use of supplemental damping along the sides of a rocking wall coupled to a yielding structure is not recommended. The paper shows that supplemental damping along the sides of the rocking wall may have some limited beneficial effects for structures with longer preyielding periods (say T1>1.0 s). Nevertheless, no notable further response reduction is observed when larger values of hysteretic or viscous damping are used.

mehrdad

Mehrdad Aghagholizadeh

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10642 Experimental Assessment of Unreinforced Clay Brick Masonry Wallets Retrofitted with CFRP

Where: Salt Palace: Hall A & 1

Session Type: Poster

Carbon Fiber Reinforced Polymer (CFRP) fabric has been widely used to externally retrofit different types of structures. In this study, wallets (prisms and panels) of clay block masonry walls subjected to axial compression and diagonal tension, respectively, retrofitted with CFRP fabric were tested. Three configurations of the CFRP fabric strips were evaluated in the panels and all were found to improve the performance of the panels in terms of all or some mechanical properties such as maximum shear strength, maximum shear strain, shear modulus and energy dissipation. It was observed that the strength capacity of prisms subjected to axial compression is reduced, but the strain capacity of the prisms is increased. The contribution of the CFRP fabric was also experimentally determined and it was found that its contribution can be improved by implementing adequate anchorage systems in the construction system.

Julian Carrillo

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10648 Hybrid Simulation of Tall Bridge with Model Updating

Where: Salt Palace: Hall A & 1

Session Type: Poster

Design and analysis of isolation systems typically assume parallel end-plate conditions. However, rotations can be introduced when the bearings are placed in flexible structural elements. Previous research has shown that introducing rotational demands on natural and lead rubber bearing can lead to decreases in the expected horizontal stiffness of the bearing. To explore the potential effects of rotation, a bridge with tall flexible piers with lead rubber bearings is tested using hybrid simulation. Current models typically simplify the rotational behavior and coupling of the bearing. Thus, model updating will be used so that the rotational behavior of the bearings can be learned from a single tested bearing to update all numerically modeled isolation bearings. This methodology significantly reduces the cost of testing and improves the accuracy of hybrid simulation so that a novel implementation can be efficiently tested.

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Maria C. Lopez Ruiz

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10663 Overview of the Seismic Resistance of Sustainable Earthen Buildings

Where: Salt Palace: Hall A & 1

Session Type: Poster

Earthen structures are made of nontoxic, minimally processed materials readily available at the site location, such as soil, water, and straw, and do not require significant professional construction skills, nor advanced equipment. For these reasons, they are common amongst rural populations in many regions of the world. Despite their low shear strength and poor seismic performance, earthen shelters are currently adopted also by populations living in seismic active regions. In the search for innovation and enhanced seismic resiliency of the vulnerable communities living in earth-made houses, an overview of the state-of-the-art practices and recently suggested seismic improvements are presented herein. In particular, SuperAdobe constructions made of soil bags connected by barbed steel wire are of interest for their improved shear strength. However, additional retrofit interventions may be needed to increase their seismic resistance and prevent considerable material damage and irreparable loss of lives and cultural property. Further investigations, including systematic full-scale testing, are proposed as critically needed to advance the resilience of the communities adopting soil as the main construction material.

Gloria Faraone

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10680 NHERI TallWood 10-story Test Nonstructural, Part 3 of 4: Cold-Formed Steel Framed Interior Walls

Where: Salt Palace: Hall A & 1

Session Type: Poster

Nonstructural interior partition walls constructed by cold-formed steel (CFS) may be damaged at small story drift during an earthquake. To avoid these damages, this paper illustrates two types of tracks and five different corner details to accommodate in-plane and out-of-plane movement. A 10-story mass timber structural system with these interior CFS walls will be constructed and tested at an upcoming shaking table test at UC San Diego.

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YI-EN JI

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10684 Inelastic Cyclic Behavior of C-Shaped Composite Plate Shear Walls – Concrete Filled

Where: Salt Palace: Hall A & 1

Session Type: Poster

This research project was conducted to investigate the cyclic lateral load behavior of Composite Plate Shear Wall/Concrete Filled (C-PSW/CF), in terms of strength, and drift capacity. The testing program includes two large-scale C-shaped concrete filled composite plate shear core walls subjected to flexure and axial loads together. Their dimensions were the same, but different axial loads were applied up to 19% of axial loading capacity. The composite behavior and inelastic response were investigated and compared to results from plastic moment calculations. This provides valuable results on the expected behavior of one composite cross-section that is frequently used in full core wall. This was done to support the development of design guidelines for high-rise core-wall steel buildings having C-PSW/CF as the primary lateral force resisting system.

michael bruneau

Michel Bruneau, SUNY Distinguished Professor

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10691 High-Fidelity Testbed Development for Regional Risk Assessment in Alameda, California

Where: Salt Palace: Hall A & 1

Session Type: Poster

Assembling a building inventory for a high-resolution regional seismic risk assessment from publicly available data is a laborious task with several challenges due to the disparate nature of publicly available structural and demographic information. The authors developed an open-source framework for inventory generation and proposed a standardized schema for building inventories. The framework provides templates to automate or greatly facilitate common tasks in data harvesting, merging, and augmentation. This paper illustrates the application of the framework to create a building inventory for the city of Alameda, California, and provides an example of ground shaking and liquefaction-induced damage assessment for the city to illustrate the investigations that are enabled by such high-resolution regional analysis. The inventory-generation framework and corresponding templates, as well as the testbed produced for Alameda, are available at the NHERI SimCenter.

tamikab

Tamika Bassman

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10696 Cumulative damage in a real seismic sequence recorded in Mexico City soft soils

Where: Salt Palace: Hall A & 1

Session Type: Poster

A reasonable estimate of structural damage is necessary for risk analysis and seismic risk mitigation. Estimate structural damage implies that the seismic hazard of the study region must be considered most approximately and realistically, considering the useful life of the structures. This analysis would imply that all the earthquakes that a structure should withstand during its useful life are considered, even if the design standards only use a unique design spectrum. This article analyzes the structural response and the expected damage in a structure subjected to a real seismic sequence recorded for 38 years. For this, a 2D-frame was considered using a degrading model to represent its plastic behavior and seismic energy concepts to study structural damage.

Pablo Quinde, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10704 Non-destructive Structural Condition Assessment Method Using Multi-sensor Fusion

Where: Salt Palace: Hall A & 1

Session Type: Poster

Civil infrastructure deterioration and its impact on lifetime structural performance is one the foremost concerns of civil engineers. Various structural damage weakens civil infrastructures, and consequently the degrading infrastructures are getting more susceptible to extreme events. Extensive research efforts have been devoted to developing effective and non-destructive damage assessment methods utilizing the neutral axis (NA) as the NA change have known to be a sensitive damage indicator. However, existing methods for assessing structural health condition are not practically effective as they are affected by many factors including the temperature change. Therefore, this research proposes a new structural condition assessment method using an equivalent neutral axis (ENA) that can be estimated based on acceleration and strain measurements with the help of the sensor fusion technique. Numerical simulation study is conducted on steel and reinforced concrete beam models to investigate the performance of the proposed ENA damage indicator with respect to the sensor configuration and damage level. Also, experimental tests are conducted to further validate the proposed method and prove the sensitivity of the ENA to structural damage. The results show a good agreement between the analytical data and reconstructed method for displacement values.

mostafa

Mostafa HF. Abdelhafeez, MD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10708 System identification of the Civil Hospital Alausí

Where: Salt Palace: Hall A & 1

Session Type: Poster

The Civil Hospital Alausí is a two-story structural wall building located in Alausí, Ecuador. The structure was built eighty years ago, thus, it resisted several numbers of earthquakes, and developed some pathologies, like cracks. A three-dimensional model of the building was prepared to simulate the seismic performance calibrated with the instrumentation of the structure using accelerometers and its ambient vibration was recorded. The recordings were used to identify the dynamic properties of the structure, in order to propose options for the reinforcement of the building and have the technical evidence of its efficiency. The obtained natural frequencies and modal shapes were compared with those from the linear model of the structure. Therefore, the comparison of the model-estimated modal parameters with those obtained from the recorded data will provide insight for the development of accurate, yet efficient, numerical models for actual buildings.

enrique morales

Enrique A. Morales, Ph.D

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10714 A Preliminary Comparison of Modeling Approaches for Seismic Response of Reinforced Concrete Columns

Where: Salt Palace: Hall A & 1

Session Type: Poster

This paper presents a comparison of three methods for modeling the behavior of reinforced concrete columns under seismic loads. We develop nonlinear simulation models of a ductile perimeter-frame building that feature two widely-used numerical modeling approaches-distributed and lumped plasticity-and a recently-developed lumped plasticity model and compare the response predicted by each model. We assess a single column and four-story ductile frame in static pushover and nonlinear dynamic analysis. Our results highlight the differences in modeling approach on a component and system level and illustrate how these minor differences in model definition can propagate into large differences in system response.

Polly Murray, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10721 Vulnerability Index for Fragility Assessment of Skewed Reinforcement Concrete Bridges

Where: Salt Palace: Hall A & 1

Session Type: Poster

Skewed bridges are frequently utilized in highway interchanges where straight or un-skewed bridges are impractical. Several bridges with geometric anomalies, particularly substantial skewness, have been heavily damaged during past earthquake events. This research studies seismic vulnerability analysis of skewed reinforced concrete bridges. A first-order reliability approach is adopted to calculate failure probabilities effectively and precisely. For this, a new structural reliability method is developed, which integrates structural and reliability analysis. To capture the complete vulnerability information of the target structure, 3D fragility surfaces are developed from multiple fragility curves. In order to represent the seismic reliability of the structures, a vulnerability index is proposed for derived fragility surfaces. The new index makes it possible to compare fragility curves numerically, not graphically. Also, the proposed vulnerability index will be helpful to quantify or rank the hazard vulnerability of the engaging structure.

Mohamed Sherif, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10723 Evaluating Out-of-plane Sway Buckling Failure of Gusset Plate in Braced Frame System

Where: Salt Palace: Hall A & 1

Session Type: Poster

Braces and their connections with beams and columns of the Special concentrically braced frames (SCBFs) are designed and detailed to achieve the higher level of displacement ductility and energy dissipation. A new type of end connection has been proposed recently to increase the resilience and reduce the damage of the non-structural components by preventing the out-of-plane buckling of brace members. However, recent experimental studies highlighted the instability of the brace member toward out-of-plane buckling during the cyclic loading. In the present study, a simplified analytical equation is proposed based on the rigid beam-spring model (RBSM) to prevent out-of-plane buckling (OOPB) in SCBF system with in-plane buckling (IPB) end connection. A Yield Line Model (YLM) for the gusset plate has also been proposed to quantify the stability of the corner connection in the presence of the axial load of the brace member. The uncertainties in predicting the buckling plane are discussed, and numerical simulation is carried out to study the influence of the imperfection, residual stress, frame action, partial yielding, and clearance on the out-of-plane stability of the brace member. The analytical equation is modified based on numerical simulation to incorporate the complex effect of the plane buckling using regression analysis.

Pratik Mr. Patra

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10724 Numerical Analysis of a Buckling Restrained Braced Frame Structure for Shake Table Testing

Where: Salt Palace: Hall A & 1

Session Type: Poster

The 1-DOF Large High-Performance Outdoor Shake Table (LHPOST) at UC San Diego is a national shared-use facility currently being upgraded to facilitate 6-DOF shaking (LHPOST6) [1]. To complement the facilities equipment inventory, a Modular Test Bed Building (MTB2) is being designed for direct adaptation to LHPOST6. This 3-story steel-framed structure is designed to be reconfigurable, to be reused for testing various structural and nonstructural systems. To facilitate a variety of dynamic and inelastic characteristics of MTB2, three inelastic mechanisms are being implemented. Namely, 1) Buckling-Restrained Braced Frames (BRBF), 2) Special Moment Frames (SMF), utilizing easily replaceable fuse plates, and 3) column base connections with yielding stretch length anchors. Each of these systems are replaceable, economical, and facilitate the simple and efficient erection of the MTB2, while also allowing replacement of strategically placed yielding elements. The BRB-1 configuration of the MTB2 is investigated using two different numerical analysis platforms, namely ETABs and OpenSees, to perform Eigenvalue analyses and nonlinear static pushover analyses. Results are used to support the design of the various inelastic elements of the structure, with a particular focus on assuring a clear delineation of the attainment of individual performance limit states of the lateral load resisting systems.

Michael Morano

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10734 Lateral Displacement protocol of the first-story Steel Column in Buckling-Restrained Braced Frames under Near-Fault Earthquake Motions

Where: Salt Palace: Hall A & 1

Session Type: Poster

The loading protocol for beam-to-column moment connections in special moment frame specified in AISC was designed for static cyclic tests. The loading protocol for the first-story column of buckling restrained braced frame (BRBF) has not been developed. Since the column base is expected to form a plastic hinge in earthquakes, a lateral displacement protocol focused on the first-story column is needed for the test. Moreover, the standard loading protocol suggested by AISC 341-16 (2016) [1] does not consider the effect of near-fault, which is common in Taiwan. Therefore, this work was focused on the inter-story drift response of the first-story column in BRBFs in nonlinear static and dynamic analysis, particularly under near-fault earthquake motions.

Yu-Fang YF. Liu, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10750 Robust Output-only Modal Identification with Full-field, High-spatial-dimensional Measurements

Where: Salt Palace: Hall A & 1

Session Type: Poster

High-fidelity characterization of structural dynamics has recently been made possible by the emerging full-field, high-spatial-resolution vibration measurement (i.e., very dense spatial measurement points) techniques using optical methods such as photogrammetry and laser vibrometers. However, a significant obstacle to tackle is output-only identification of high-spatial-resolution modal parameters, especially the determination of physical modes from spurious, because many modes are only weakly present in the noisy vibration measurements. In this short paper we present our recent work in developing a new non-parametric, data-driven approach for robust output-only identification of high-spatial-dimensional modal parameters, by exploiting the full-field, high-spatial-resolution response measurement data. We present experimental study about the performance of the new method and comparisons with a few existing methods and observe encouraging results. We also discuss its applicability and limitations for more complex dynamic structures.

Yongchao Yang, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10751 A displacement/damage controlled seismic design method for CFT-MRFs

Where: Salt Palace: Hall A & 1

Session Type: Poster

This paper presents a displacement/damage controlled (DDC) seismic design method for composite (steel/concrete) moment-resisting frames (MRFs) consisting of circular concrete filled-steel tube columns (CFT) and composite beams (steel beams connected with concrete floor slabs). The proposed method works within the performance-based seismic design framework by controlling displacement and damage for targeted seismic performance levels including the one near collapse. The method requires a reduced number of design iterations and can estimate at a preliminary phase both the inter-storey drift ratio (IDR) and damage index (DI) of members for a given seismic intensity. The method uses empirical expressions derived by means of statistical and sensitivity analysis of a large seismic response databank consists of IDR and DI that cover all the way from elastic behavior to final global dynamic instability and collapse. Time history analysis results of designed examples demonstrate the advantage of DDC to control better the inelastic response of the frames over the conventional force-based seismic design methods. DDC successfully estimates the target IDR as well as limits the DI in beam-to-column joints to avoid excessive plastic damage and deformations at single storeys.

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Konstantinos Skalomenos

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10765 Response Control Strategy for Protection of Structures using Magnetorheological Dampers

Where: Salt Palace: Hall A & 1

Session Type: Poster

In this study, the application of a recently developed response control algorithm, i.e., the energy-based predictive (EBP) algorithm, for the mitigation of the excessive vibration response of structures using magnetorheological (MR) dampers is investigated. A modified EBP algorithm, wherein the voltage supply to the MR damper is dictated in real-time based on the mechanical energy of the vibrating structure, is presented for semi-active tuned mass dampers equipped with MR dampers. The suitability of the proposed strategy is assessed through numerical investigations conducted on a structure fitted with the MR damper. Moreover, the effects of the key model parameters on the performance of the strategy are studied. The findings of the investigation demonstrate that the implementation of the MR damper driven with the EBP algorithm results in enhanced vibration mitigation as compared to the passive control strategy. Hence, the modified EBP algorithm could be a potential vibration control strategy for the protection of structures against the adverse effects of dynamic loads using MR dampers.

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Vasant A. Matsagar, Ph.D.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10766 Post-earthquake Water Supply Restoration Model

Where: Salt Palace: Hall A & 1

Session Type: Poster

Water supply networks can sustain significant damage due to ground motion and ground failure caused by earthquakes. While there have been numerous efforts modeling the effect of damage and restoration after earthquake, tools developed have been model/network-specific and or not suited for a large real-life scenario. REWET is a general tool capable of incorporating any restoration strategy plan while providing an apt hydraulic analysis of the system

Sina Naeimi, Masters

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10781 Out-of-plane Seismic Capacity of New Masonry System using Interlocking Mechanism

Where: Salt Palace: Hall A & 1

Session Type: Poster

The authors developed two types of block systems consisting only of main block and key block without joint mortar to improve the in-plane and out-of- plane seismic performances and to enhance the workability. Two types of block systems have different key block shapes. The proposed block systems have a half-height difference between the main block and the key block to be expected high seismic performance in in-plane and out-of-plane directions compared to typical masonry wall with joint mortar. In this study, 4-point bending tests are performed to evaluate the out-of-plane seismic performance of the proposed block systems. As a result, the out-of-plane seismic performance of the proposed block systems were considerably higher than those of typical block system.

Ho Choi, Ph.D.

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10782 Hybrid Rocking Wall with Locally Heat-Treated Replaceable Bars for Hysteretic Energy Dissipation

Where: Salt Palace: Hall A & 1

Session Type: Poster

Structural rocking walls are of interest in seismic applications as they are capable of re-centering after a major earthquake with limited damage. However, these wall systems have low inherent damping, which can lead to long oscillations if they are not supplemented with energy dissipating elements. For this purpose, Hybrid Rocking Walls (HRWs) have been developed to incorporate partially debonded longitudinal bars over the rocking interface for hysteretic energy dissipation. HRWs effectively combine re-centering with energy dissipation through inelastic deformation of the bars, but in most cases inspection and replacement of the bars after a major earthquake can be impractical. This paper presents a new HRW system that has the energy-dissipating bars locally heat treated to strategically concentrate the inelastic deformations in replaceable bar segments. The location of the heat-treated bar segments in the wall is selected such that the inspection and replacement of the bars can be performed at reduced time and cost. This study investigates the reverse-cyclic behavior of the proposed HRW system.

Dimitrios Kalliontzis, PhD

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10802 Experimental Investigation of Shipping Container Wall Ductility and Seismic Response

Where: Salt Palace: Hall A & 1

Session Type: Poster

This research investigated the seismic behavior of a shipping container as a structural system, including the seismic response modification factor (R), and other aspects of the plastic behavior of a container wall panel. Minimum performance requirements for shipping containers are available in ISO 1496, and there has been some experimental research verifying the elastic properties of containers. Some literature recommends an R-value of 2, and based on a literature review, this recommendation appears to be an expert opinion and may not be verified by testing or modeling. Research testing was performed by cutting a 40-ft long High-Cube (9.5 feet tall) shipping container wall into 8-foot-long sections, then cyclically loading specimens per ASTM E2126 method C (CUREE). Results indicate that (1) the container wall panel has a much higher shear capacity than the minimum standard given in ISO codes, (2) proper detailing is critical to ensure maximum ductility and shearwall capacity, and (3) a seismic response modification factor of 4 is supported by test results, though additional testing is warranted to support general guidance for shipping container structures.

Noah Nieman, MS

Poster Presenter

June 28, 2022 5:00 PM - 6:30 PM

10807 Moment-Curvature Analysis for Strain Estimates of Concrete T-Shaped Walls Reinforced with High-Strength Steel

Where: Salt Palace: Hall A & 1

Session Type: Poster

Recent experimental tests of concrete walls have shown that walls reinforced with high-strength steel (HSS), Grade 80 (550 MPa) or higher, exhibit similar deformation capacity to walls with conventional Grade 60 (420) reinforcement. Estimates of material strains are needed for proper detailing of wall boundary elements. Moment-curvature analyses were implemented to support closed-form solutions for calculating strain demands on the reinforcement and concrete of yielding walls. The proposed formulations include deformations due to flexure, shear, and strain penetration and were evaluated using test data of six T-shaped walls.

Erick A. Burgos, PhD

Poster Presenter

WEDNESDAY, JUNE 29, 2022

June 29, 2022 8:30 AM - 9:30 AM

P.S.02 2022 Distinguished Lecture: From Ductility to Repairability: Evolution of Building Design in the Wake of the Christchurch Earthquake

Where: Salt Palace: Ballroom E-J

Session Type: Plenary

New Zealand and many other countries around the world adopted ductility-based design concepts in the late 1970s and early 1980s. The adoption of these design concepts are likely the single most important advancement in our design philosophy in terms of protecting life safety in future earthquakes. Ductility, however, cannot be achieved without damage to the structure and its contents. Recent earthquakes have openly challenged the engineering community as to whether our focus on ductility has delivered what society intrinsically expects from its buildings during and after strong earthquakes. Recognizing that building design is best driven by observations from real earthquakes, we will use the 2011 Christchurch Earthquake as a case study to explore if it is time for another fundamental shift in our approach to building design; from ductility to repairability.

How we design and construct buildings will clearly influence building performance in future earthquakes, which will in turn influence outcomes for occupants (injuries and deaths), as well as for the buildings themselves (demolition, repairs, abandonment). But it is the economic, environmental and social impacts resulting (in part) from these human and building outcomes which leave a lasting impression on our communities. Managing these impacts from future earthquakes should be the driver behind future changes to how we design buildings. Eleven years after the Christchurch earthquake we are now in a better position to appreciate such impacts including business losses, insurance costs and delays, environmental impacts, urban blight, and wellbeing. We will review some of these impacts and reconsider if our building design targets are suitable for managing these impacts in future earthquakes. We argue a need to change our focus from just life-safety to serviceability in frequent earthquakes and repairability in design level ground motions. Component deformation limits for concrete buildings which enable structural repair without loss of structural safety will be discussed and the repairability of current structural designs will be assessed.

Kenneth Elwood, Professor

Speaker - Oral

June 29, 2022 10:00 AM - 11:30 AM

S.S.14 Bringing Design for Functional Recovery into State of Practice

Where: Salt Palace: Ballroom D

Session Type: Special Session

This session will present technical improvements in quantifying functional recovery times for buildings and related costs and benefits. These improvements have come together in a very short time since the publication of FEMA P-2090 / NIST SP-1254, Recommended Options for Improving the Built Environment for Post-Earthquake Reoccupancy and Functional Recovery Time, in January 2021. They provide us a glimpse of the evaluation capabilities that structural engineers now have, and are currently using in practice, to provide owners and stakeholders better information on designing their buildings to regain function more quickly after an earthquake.

These technical developments were done to be entirely consistent with the recommendations of the Functional Recovery report; however, as the delay in broad nation-wide implementation of performance-based seismic design has shown, it is important to provide refined tools for easy implementation of the approach by the technical community and relevant information to be shared with stakeholders to encourage utilization of functional recovery design objectives. The first half of the session will include brief presentations from three panelists on technical developments being conducted by FEMA, NIST, and ATC, and the second half will include a focused discussion on further needs for technology, tools, and data development.

Jon A. Heintz

Moderator

Ronald O. Hamburger, BS, MS

Speaker - Oral
A Functional Recovery Time Module for the FEMA P58 Methodology
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Curt B. Haselton, PhD

Speaker - Oral
Updated Analytical Tools and How They are Being Used on Recent Projects

Juan F. Fung, PhD

Speaker - Oral
Economic Considerations for Recovery-Based Design

Ayse Hortacsu

Session Organizer

June 29, 2022 10:00 AM - 11:30 AM

S.S.15 Retrofit of the Salt Lake City Church of Jesus Christ of Latter-day Saints Temple

Where: Salt Palace: Ballroom E-J

Session Type: Sponsored Session

The Main Temple of the Church of Jesus Christ of Latter-day Saints in Salt Lake City has stood as a central focal point of the Mormon faith for over 125 years. Based on recent studies, the Church decided to undertake a complete retrofit of the Temple to make it seismically resilient for a very large earthquake occurring on the Wasatch Fault. The structural design for this retrofit provides a seismic isolation and load transfer system at the base of the Temple. The design also ties together the solid stone masonry structure with a new steel-braced attic diaphragm, vertical post-tensioning in the walls and towers, and a system of steel strengthening in the spires in the upper regions of the towers.

This session will review the process used for the complex dynamic evaluation of the Temple retrofit and will highlight several unusual analytical challenges encountered. The challenges to be discussed include: the development of the material properties of the superstructure model to correspond to the results of forced-vibration testing of the Temple, evaluating the unexpectedly pronounced lateral effects of vertical ground motion, the need for refined modeling in the significant load transfer system, and ongoing construction-phase modeling.

This session was designed and sponsored by Forell | Elsesser. 

Forell Elsesser

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Rene Vignos

Speaker - Oral
Retrofit of the Salt Lake City Church of Jesus Christ of Latter-day Saints Temple
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Mason Walters

Speaker - Oral
 
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Ali Roufegarinejad, PhD

Speaker - Oral
 

June 29, 2022 10:00 AM - 11:30 AM

S.S.16 The 2021 Mw 7.2 Nippes, Haiti Earthquake: Observations at the Intersection of Earthquake and Geotechnical Engineering, Reconnaissance Missions, Response and Recovery, and Social Sciences

Where: Salt Palace: 250 DEF

Session Type: Special Session

The 2021 Mw 7.2 Nippes, Haiti Earthquake posed significant challenges for response and recovery in Haiti. The dual hazards of this earthquake and Tropical Storm Grace two days afterwards had significant impact on the landscape and infrastructure of Haiti's southwestern peninsula, including: structural damages, slope instability, landslides, ground failures, and strong ground shaking. In addition, response efforts faced challenges due to the COVID-19 pandemic and ongoing political instability in the country. These cascading events highlight the need for short-term response and long-term recovery to work within the greater social-political-cultural context of Haiti. This special session will advance our understanding of the recent 2021 Mw7.2 Nippes, Haiti earthquake through the lenses of the regional seismicity, ground motions, geotechnical observations, structural damage, social impacts, recovery, and potential paths to resilience in the region. Session speakers will cover a broad range of topics addressing the multidisciplinary nature of the responses to this event, including comparisons to the 2010 Mw 7.0 Haiti earthquake, and learning remotely from disasters abroad. At the end of the session, an interactive panel discussion will take place in which each of the speakers will discuss future research directions, while also entertaining questions from the audience addressed to the panel.

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Ashly Cabas, PhD

Speaker - Oral
The 2021 Mw 7.2 Nippes, Haiti Earthquake: Observations at the Intersection of Earthquake and Geotechnical Engineering, Reconnaissance Missions, Response and Recovery, and Social Sciences
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Ashly Cabas, PhD

Speaker - Oral
Seismological Aspects and Ground Motion Characteristics from the 2021 M 7.2 Nippes Haiti Earthquake
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Fernando E. Garcia, PhD

Speaker - Oral
Geotechnical Aspects of the 2021 Mw 7.2 Nippes, Haiti Earthquake
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Tracy L. Kijewski-Correa, PhD

Speaker - Oral
Building Performance in the Nippes, Haiti Earthquake: Lessons Learned from a Hybrid Response Model
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Sabine Loos, PhD

Speaker - Oral
Best practices for collecting and using post-earthquake damage data: lessons from Haiti and other past events
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Janise Rodgers, PhD

Speaker - Oral
Efforts to Improve Seismic Resilience in Nippes Department, Haiti, Before and After the 2021 Earthquake
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Davis T. Engler

Speaker - Oral
An Accounting of USGS PAGER Post-event Loss Estimates and Updates for the 2021 Haiti (M7.2) Earthquake

June 29, 2022 10:00 AM - 11:30 AM

T.S.17 Advances in Simulation and Testing of Steel Buildings

Where: Salt Palace: Ballroom B

Session Type: Technical Topic Session

In this session, presenters will discuss efforts to assess the performance of steel structural systems and components via numerical modeling and laboratory testing.

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Kevin Wong

Moderator
 
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JOEL Lanning, PhD

Speaker - Oral
Rotational Strength and Stiffness of Gusset Plates for Buckling-Restrained Braced Frame Connections
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Chao-Hsien Li, Ph.D.

Speaker - Oral
Strain Aging Effect on Seismic Response of Buckling-Restrained Braces
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Miguel Medalla, Mr.

Speaker - Oral
Analytical Behavior of Exposed Base Plates with Extended Anchor Bolts
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Jason P. McCormick, PhD, PE

Speaker - Oral
Experimental Testing of Deep Wide Flange Column Subassemblies
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SUDAN PANDEY

Speaker - Oral
Behavior of Seismic Collectors in Steel Building Structures
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Chao-Hsien Li, Ph.D.

Speaker - Oral
Shake Table Tests on Seismic Response of Collectors in Steel Buildings

June 29, 2022 10:00 AM - 11:30 AM

T.S.18 Numerical Modeling and Advances in Non-Linear Modeling Tools

Where: Salt Palace: Ballroom C

Session Type: Technical Topic Session

As engineers, we seek the ability to apply our understanding of fundamental physics to numerically model the dynamic response of soil and its overlying infrastructure in an earthquake. This session will present new advances and applications of numerical modeling in geotechnical earthquake engineering.

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Jongwon Lee, Ph.D., P.E.

Moderator
 
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Kaleigh Yost

Speaker - Oral
Harnessing Numerical Tools to Study the Limitations of CPTs for Characterizing Complex Soil Stratigraphies for Liquefaction Assessment
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Tyler Oathes

Speaker - Oral
A Framework for Predicting the Onset of Localization in Plastic Soils Considering Viscous Effects
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John Thornley, PhD

Speaker - Oral
Evaluation of Shear Modulus Reduction and Damping Curves Using a Downhole Array in Anchorage, Alaska
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Abdelrahman Alsardi

Speaker - Oral
Comparison of the Material Point Method with One-dimensional Site Response Solution
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Hsin Chen Chou

Speaker - Oral
Effect of Shear Wave Velocity Stratification Scheme on 3D Ground Response Analysis
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Youngkyu Cho, Ph.D.

Speaker - Oral
Uncertainty in Developing Seismic Fragility Curves of Slopes using Finite Element Simulations

June 29, 2022 10:00 AM - 11:30 AM

T.S.19 Ground Motion Modeling

Where: Salt Palace: 150 G

Session Type: Technical Topic Session

Ground motion models (GMMs) provide estimates of ground motion intensity measures and are often used in engineering seismology and seismic hazard assessment. In this session, new techniques are presented for developing new models, as well as application and integration of existing models to better understand specific case studies.

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Christine Goulet, PhD

Moderator
 
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Van Bang pb. Phung

Speaker - Oral
Methodology for Developing Empirical Ground-Motion Models with Compatible Shear-Wave Profiles and Kappa

Jawad Fayaz

Speaker - Oral
A Deep Learning based Generalized Ground Motion Model for the Chilean Subduction Seismic Environment

Melanie Walling

Speaker - Oral
A Bayesian Coregionalization Model For Spatial Cross-Correlation Of Ground Motion
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Tristan E. Buckreis

Speaker - Oral
Seismic Ground Motion Prediction for Delta Region of California Including Regional Path Effects and Local Site Response
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Grace A. Parker, PhD

Speaker - Oral
Spatially Continuous Models of Aleatory Variability in Seismic Site Response for Southern California
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Mahdi Bahrampouri, BS, MS, PhD

Speaker - Lightning
KApplicability of the NGA-West2 Damping Scaling Factors to Ground Motions Recorded in France
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Ronnie Kamai

Speaker - Lightning
KCan Groundwater Depth be a Reliable Proxy for Vertical Site-Response?

Chih-Hsuan Sung

Speaker - Lightning
Non-ergodic Ground-Motion Model for the Wasatch Front, Utah
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Pablo Heresi, PhD

Speaker - Lightning
Within-Event Spatial Correlation of Ground Motion Intensities for Chilean Subduction Earthquakes

June 29, 2022 10:00 AM - 11:30 AM

T.S.20 Advances in Performance Based Seismic Design

Where: Salt Palace: 250 ABC

Session Type: Technical Topic Session

In this session, presenters will discuss the latest efforts to improve performance-based design frameworks, and highlight knowledge gaps in the current seismic design methods.

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Maha Kenawy

Moderator
 
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Larry Fahnestock

Speaker - Oral
Shake Table Testing of a Frame-Spine System with Force-Limiting Connections
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Konstantinos Skalomenos

Speaker - Oral
Multi-Level Seismic Design of Intentionally Eccentric IH-Treated Steel Braces
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Anne M. Hulsey

Speaker - Oral
Risk-Targeted Framework for Seismic Design Based on Societal Expectations of Risk
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Eduardo Miranda, PhD

Speaker - Oral
Seismic design and evaluation of structures located near major active faults
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Andréia Silva

Speaker - Oral
Towards Seismic Design of Structures Accounting for Rocking-Flexure Interaction
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Ravi Sinha, PhD

Speaker - Oral
Performance-Based Seismic Design Targeting Multiple Objectives in Prescriptive Seismic Design Codes

June 29, 2022 10:00 AM - 11:30 AM

T.S.21 Fragility and Vulnerability Models I

Where: Salt Palace: 251 ABC

Session Type: Technical Topic Session

This session presents studies aimed at improving various aspects of the existing fragility and vulnerability models for building structures

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Orlando Arroyo

Moderator
 
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Naveed Ahmad, PhD

Speaker - Oral
Fragility Functions for Low-/Mid-/High-Rise Modern Reinforced Concrete Moment Frames in Pakistan
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Karim Aljawhari, MSc

Speaker - Oral
Calibration of Damage-to-loss Ratios for a Case-study Structure
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Tamika Bassman

Speaker - Oral
Collapse Risk Assessment of Non-Ductile Concrete Buildings Using Advanced Simulation
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Marco F. Gallegos, Mr.

Speaker - Oral
Comparative Seismic Collapse Assessment of Chilean Code-Conforming RC Dual Wall-Frame Buildings
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Francisco A. Galvis, PhD Candidate

Speaker - Oral
Structural modeling and ground motion selection for risk assessment of pre-Northridge welded steel moment frames
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Jared DeBock

Speaker - Lightning
Comparison Of FEMA P-58 With Other Building Seismic Risk Assessment Methods
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Andres Felipe Hernandez Estrada, PhD Student

Speaker - Lightning
Performance and Comparison of Non-Linear Dynamic Analyses for Fragility Derivation When Using Hazard-Consistent CS Ground Motion Selection
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Lyan-Ywan Lu, Ph.D.

Speaker - Lightning Online Only
Probabilistic Seismic Assessment of Isolated Buildings Considering Multiple Performance Levels

June 29, 2022 10:00 AM - 11:30 AM

T.S.22 Novel Structural Systems and Low Damage Technologies II

Where: Salt Palace: 251 DEF

Session Type: Technical Topic Session

This is the second of two sessions featuring a diverse collection of studies on developing and testing novel structural systems and low-damage technologies.

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Shannon R. Abeling

Moderator
 
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Mohammad Aghajani Delavar

Speaker - Oral
Analytical and Numerical Investigation of Out-of-Plane Behavior of 3D Printed Concrete Walls
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Mohammad Aghajani Delavar

Speaker - Oral
Design of 3D Printed Concrete Walls under In-Plane Seismic Loading
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Gustavo A. Araujo Rodriguez, Ph.D(s)

Speaker - Oral
Design of a Three-story Building Using a Hybrid of Mass Ply Panel Walls with Buckling-Restrained Braces
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Matthew A. East

Speaker - Oral
Experimental Assessment of a Controlled Rocking Masonry Wall with Supplemental Energy Dissipation Constructed upon a Steel Rocking Base
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Ahmad S. Hassan, MS

Speaker - Oral
Seismic Performance of Dissipative Column Bases: Experiments, Simulations and Design Implications

Luis F. Ibarra

Speaker - Oral
Effect of Cruciform Lug Stiffeners on the Seismic Performance of Buckling Restrained Braced Frames

June 29, 2022 12:15 PM - 1:00 PM

C.M.10 EERI Northern California Regional Chapter Meeting

Where: Salt Palace: 254 ABC

Session Type: Chapter Meetings

Pick up your boxed lunch and have it with members of the Northern California Regional Chapter. Connect with old friends and make new ones. Included will be discussion on ways the Chapter can enhance value to your EERI experience. Our in-person lunch meeting is a welcomed change from all the Zoom meetings resulting from Covid...so make sure to attend...! This meeting is open to all conference attendees.

 

June 29, 2022 1:30 PM - 3:00 PM

S.S.17 Implementing the “Whole Community” Approach to Disaster Resilience

Where: Salt Palace: Ballroom A

Session Type: Special Session

In recent years, FEMA has championed a 'whole community' approach to disaster resilience, in which 'residents, emergency management practitioners, organizational and community leaders, and government officials' come together to assess community needs and strengthen community resilience. Envision Utah, a non-partisan nonprofit, has been helping spearhead this kind of whole-community effort to improve resilience to seismic and other hazards along the Wasatch Front and throughout Utah. Envision Utah has a nationally recognized track record of engaging stakeholders and the public to tackle difficult issues ranging from transportation to education.

In this session, leaders of Envision Utah's disaster resilience efforts will discuss some of the challenges and opportunities for improving seismic resilience in Utah and the importance of bringing a diverse group of stakeholders and citizens together to explore issues, create buy-in for solutions that meet local needs and make progress on otherwise intractable issues. Envision Utah will then lead a discussion with prominent Utah state leaders about how to move disaster resilience projects forward.

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Robert J. Grow, J.D.

Speaker - Oral
 
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Lisa G. Sun, JD

Speaker - Oral
Implementing the "Whole Community" Approach to Disaster Resilience
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Jessica S. Chappell, SE

Speaker - Oral
 
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Ryan Beck, Masters, Environmental Law & Policy

Speaker - Oral
 
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Brad Wilson

Speaker - Oral
 
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Jerry Stevenson

Speaker - Oral
 

June 29, 2022 1:30 PM - 3:00 PM

S.S.18 Recovery Categories and Target Recovery Times for Development of a Functional Recovery Framework

Where: Salt Palace: Ballroom D

Session Type: Special Session

This workshop will facilitate attendee interaction to inform recovery categories and times for a functional recovery (FR) framework. Ensuring the public can reoccupy buildings and benefit from return of key services mitigates risk from earthquakes and improves community resilience. The FEMA P-2090/NIST SP-1254 report to congress identified development of a FR framework as key to improving FR of the built environment. Widely applicable minimums for FR performance are necessary to better equalize risk across the U.S.. A critical step in framework development is identifying recovery categories and times. Acceptable recovery times for components of the built environment should be developed based upon the component's role in supporting necessary functions and services. In developing the report, five stakeholder workshops were held to identify recovery times necessary to prevent severe community disruption. This session will present data and findings from previous workshops, and proposed recovery categories and times NIST has developed. Additional activities will serve to gather real-time expert opinion and further inform development of recovery categories and times and will be recorded in a subsequent publication. The outcomes of this workshop will contribute significantly to the development of a FR framework that can inform future editions of codes and standards.

katherine johnson

Katherine J. Johnson, PhD

Speaker - Oral
Input from Stakeholders on Recovery Timeframes and Assessment of Functional Recovery Options
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Dustin Cook, PhD

Speaker - Oral
Preliminary Recovery Categories and Times for a Functional Recovery Framework

Siamak Sattar, PhD

Speaker - Oral
Preliminary Recovery Categories and Times for a Functional Recovery Framework

June 29, 2022 1:30 PM - 3:00 PM

S.S.20 New Design Approaches for Mass Timber Buildings in the United States

Where: Salt Palace: 250 ABC

Session Type: Special Session

Mass timber, and in particular Cross Laminated Timber (CLT), has received substantial interest all over the world including the United States. A number of research projects have been completed and are ongoing, and hundreds of construction projects are completed or underway nationwide. Buildings using CLT as the seismic force resisting system have had to use the alternative procedures within ASCE 7-16, but ASCE 7-22 is set to include CLT shear walls. However, for taller buildings and other unique designs, methods are being proposed and projects in excess of 10 stories are underway. This session will highlight both cutting-edge research and the practical side of CLT buildings and mass timber construction. The following four cutting edge projects led by academics that are funded by the National Science Foundation, Tall Building Institute, and U.S. Department of Housing and Urban Development present the state-of-the-art research on mass timber construction in the U.S.

  1. Cooperative Research to Enable Mass Timber Multi-Family Housing Technologies
  2. Development and Validation of a Resilience-based Seismic Design Methodology for Tall Wood Buildings
  3. Three-story Full-scale Testing of Innovative Mass Timber Lateral Force Systems
  4. Design and Analysis of Hybrid CLT Buildings
pouria bahmani

Pouria Bahmani, PhD, PE

Session Organizer
New Design Approaches for Mass Timber Buildings in the United States
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John van de Lindt, Harold H. Short Endowed Chair Professor,

Speaker - Oral
New Design Approaches for Mass Timber Buildings in the United States
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Andre R. Barbosa, PhD

Speaker - Oral
Three-story Full-scale Testing of Innovative Mass Timber Lateral Force Systems
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James D. Dolan, Ph.D.

Speaker - Oral
Design And Analysis Of Hybrid CLT Buildings For Seismic Regions
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shiling pei, Ph.D., P.E.

Speaker - Oral
Development and Validation of a Resilience-based Seismic Design Methodology for Tall Wood Buildings
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Maria Koliou, PhD

Speaker - Oral
Cooperative Research to Enable Mass Timber Multi-Family Housing Technologies, HUD Project

June 29, 2022 1:30 PM - 3:00 PM

S.S.21 Lessons Learned from Earthquake Reconnaissance

Where: Salt Palace: 250 DEF

Session Type: Special Session

This special session will review lessons learned from recent earthquake reconnaissance efforts and subsequent post-earthquake analyses and assessment studies.

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David Frost, Ph.D.

Moderator
 
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Bruce Maison

Speaker - Oral
EERI Northern California Chapter: Quick Quake Briefing webinars
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Morolake O. Omoya

Speaker - Oral
Bayesian Methods for Modeling Post-Earthquake Damage and Recovery of Infrastructure
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Arturo Tena-Colunga, PhD

Speaker - Oral
Correlations between conditions of structural irregularity and the severity of the observed damage during the 2017 Tehuantepec Earthquake
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Arturo Tena-Colunga, PhD

Speaker - Oral
Observed performance of medical infrastructure in Mexico City during the September 19, 2017 Axiochapan Earthquake and current adaptive resilience
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Chiara McKenney

Speaker - Oral
Overview of the 2019 Albania Earthquake Damage to Buildings

Max Wyss, PhD

Speaker Online Only
Three Loss Estimates for M7+ Earthquakes in Haiti
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Marcelo M. Romo, Mr, Msc

Speaker - Lightning Online Only
Some Lessons on Soil Liquefaction Under the Mw 7.8 Muisne Earthquake in 2016 in Ecuador

June 29, 2022 1:30 PM - 3:00 PM

S.S.24 Quantitative and Qualitative Approaches to Addressing Equity in Disaster Risk

Where: Salt Palace: 151 G

Session Type: Special Session

FEMA recently announced several initiatives to advance equity in its disaster mitigation and response programs. However, new approaches are needed to adjust and augment existing quantitative methods used in disaster mitigation and response. Disasters disproportionately harm people living in poverty, minorities, and those with low English proficiency, because these populations are more likely to inhabit vulnerable buildings in high hazard areas and have limited political influence. Meanwhile, wealthier communities more easily win public mitigation and recovery resources. The Natural Hazard Mitigation Saves project team has formed a working group to examine these issues, with particular focus on how benefit-cost analysis (BCA) might incorporate equity into mitigation. This session will present 5-minute lightning talks addressing the intersection of equity in catastrophe risk modeling BCA. In a moderated discussion with audience participation, we will address how the earthquake engineering community can make progress on this important issue. Moderated discussion: moderator Eric Tate.

Nicole Dash

Speaker - Oral
Approaches to Addressing Equity in BCR – Mitigation Saves Case Study
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Yajie Lee, MS

Speaker - Oral
A Community Level PML for California and an Examination of Impact and Equity
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Neil Blais, President & CEO

Speaker - Oral
Equity Considerations for BRIC Applications
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Keith A. Porter

Speaker - Oral
The Monetary Value of Equity for Use in Disaster Resilience Benefit-Cost Analysis
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Eric Tate

Speaker - Oral
The Geography of Underserved Populations in Flood Recovery
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Jiqiu (JQ) Yuan

Speaker - Oral
Disaster Resilience: National Survey on Streamlining Hazard Mitigation Grants and Support Underserved Communities

Charlie Huyck

Session Organizer
Quantitative and Qualitative Approaches to Addressing Equity in Disaster Risk

Georgiana R. Esquivias

Speaker - Oral
Regional Indicators for Community Resilience: Restoration of Lifelines and Socially Vulnerable Populations

June 29, 2022 1:30 PM - 3:00 PM

T.S.23 Advances in Modeling and Testing of Concrete Structures

Where: Salt Palace: Ballroom B

Session Type: Technical Topic Session

Presentations in this session will focus on assessing the performance of reinforced concrete structural systems and components via numerical modeling and laboratory testing.

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Mohamed Moustafa

Moderator
 
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Rajesh Dhakal

Speaker - Oral
Detailing Provisions to Control Bar Buckling in Ductile RC Walls
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Oshin Inui, Graduate Student

Speaker - Oral
Numerical analysis on flexural behavior of unbonded post-tensioned reinforced concrete beams considering the buckling and rupture of longitudinal reinforcement
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Ismail B. Kuzucu, PhD

Speaker - Oral
Effects of Building Height and Wall Strength on the Vertical Distribution of Force-Controlled Seismic Responses in Multi-Story RC Buildings
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Andres Lepage, Ph.D.

Speaker - Oral
Chord Rotation Capacity of Diagonally Reinforced Concrete Coupling Beams
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Daniel R. Salinas, Ph.D

Speaker - Oral
Truss-Based Modeling Approach for Masonry-infilled Reinforced Concrete Frames
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Yunbyeong Chae, Ph.D.

Speaker - Lightning
Bidirectional Cyclic Loading Tests For RC Shear Walls Of Nuclear Power Plants
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Juan J. Colmenares

Speaker - Lightning
Effect of the Number of Cycles on the Seismic Residual Capacity of Slender RC Structural Walls with Unconfined Boundaries
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Carmen Lagler, pH.D.

Speaker - Lightning
Nonlinear Dynamic FEM Analysis of Unbonded Posttensioned Coupled Pendulum Shear Walls Linked with Elastic Energy Dissipating Connectors

June 29, 2022 1:30 PM - 3:00 PM

T.S.24 Soil-Structure Interaction

Where: Salt Palace: Ballroom C

Session Type: Technical Topic Session

The dynamic interaction of a structure, its foundation, and the underlying soil is complex and important. This session presents new advances in our understanding and modeling of soil-structure interaction.

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Hamidreza Sarmadi, PhD, PE

Moderator
 
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Guido Andreotti, Ph.D.

Speaker - Oral
New Insights into SSI: How Structural Capacity can be Influenced by Soil Response and SSI Effects
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Domniki Asimaki, Ph.D.

Speaker - Oral
Soil-Structure Interaction Simulation for Inclined Plane Waves in Layered Media
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JUAN MANUEL MAYORAL VILLA, PHD

Speaker - Oral
Seismic Interaction Among On-Ground and Underground Structures in Highly Populated Cities
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Rabie Farrag, PhD

Speaker - Oral
Effect of Rock-Shaft Interface Properties on the Shear Demands of Laterally Loaded Rock-Socketed Drilled Shafts
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Kadir C. Sener, PhD

Speaker - Oral
Soil-Structure-Interaction Testing and Analysis of Partially Buried Structures for SMR Applications
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Samyog Shrestha

Speaker - Oral
Sensitivity study on parameters influencing soil-structure interaction of embedded structure

June 29, 2022 1:30 PM - 3:00 PM

T.S.25 Ground Motion Modeling - Site Response

Where: Salt Palace: 150 G

Session Type: Technical Topic Session

This session presents studies related to ground motion modeling and focuses on assessing site response amplifications as well as their influences on ground motion estimations.

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Christine Goulet, PhD

Moderator
 
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Sean K. Ahdi, Ph.D., P.E.

Speaker - Oral
Implementation of Basin Models and Sediment Depth Terms in the 2023 Update of the U.S. National Seismic Hazard Model: Examples from Nevada
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Chukwuebuka C. Nweke, Ph.D.

Speaker - Oral
Sedimentary Basin Site Response for Different Basin Types in Southern California
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Maria E. Ramos-Sepulveda

Speaker - Oral
Performance of NGA-East GMMs and Site Amplification Models Relative to CENA Ground Motions
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Oliver Boyd, PhD

Speaker - Oral
Sediment Thickness and Ground Motion Site Amplification Along the United States Atlantic and Gulf Coastal Plains
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Preetish Kakoty

Speaker - Oral
A Framework to Incorporate Basin Amplification Factors in the Calculation of Uniform Hazard Spectra for Canada
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Yu-Wen Chang

Speaker Online Only
Identification of Basin Topography Characteristic Using Multivariate Singular Spectrum Analysis: Case Study of the Taipei Basin

June 29, 2022 1:30 PM - 3:00 PM

T.S.26 Fragility and Vulnerability Models II

Where: Salt Palace: 251 ABC

Session Type: Technical Topic Session

This session presents studies aimed at improving various aspects of the existing fragility and vulnerability models, including fragility models for building contents and nonbuilding structures, such as bridges.

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Curt B. Haselton, PhD

Moderator
 

Jorge L. Archbold, Ph.D

Speaker - Oral
EDP Risk Estimation with the Conditional Scenario Spectra (CSS) for Multiple Causal Tectonic Settings
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Kenneth Otárola, M.Sc.

Speaker - Oral
Fragility Analysis of Deteriorating Bridge Components Subjected to Simulated Ground-Motion Sequences
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Milad Roohi, Ph.D.

Speaker - Oral
Seismic Functionality Analysis of Interdependent Buildings and Electric Power Systems

Max T. Stephens, PhD

Speaker - Oral
Development of a Regional Seismic Response Model Using Building Clustering
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Lucas S. Hogan, PhD

Speaker - Oral
Fragility Models for Wall-type Pier Bridges in New Zealand
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Szu-Yun Lin, PhD

Speaker - Lightning
Post-Earthquake Risk and Vulnerability Assessment of Rescue Roads
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Muhammad Khalid Saifullah

Speaker - Lightning
Proficient Vector-Valued Intensity Measures for Overturning of Multi-Modal Three-Dimensional Freestanding Structures
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Jaime W. Guaman, Phd Candidate

Speaker Online Only
Seismic Performance of Unanchored Medical Equipment Deployed in Base-Isolated versus Fixed-Base Hospitals

June 29, 2022 1:30 PM - 3:00 PM

T.S.27 Innovative Structural Seismic Systems

Where: Salt Palace: 251 DEF

Session Type: Technical Topic Session

This session focuses on innovative structural systems including seismic base isolation. Attend this session to learn about structural systems which improve functional recovery and achieve enhanced seismic performance. Case studies are included.

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Geoff Bomba

Moderator
 
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Justin Marshall

Speaker - Oral
Improving Functional Recovery by Using Replaceable Fuses
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Bryam Astudillo

Speaker - Oral
Design and Performance Comparison of Strongback Systems and Typical Chevron BRB Frames
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Reid Zimmerman, P.E., S.E.

Speaker - Oral
Resilience-Based Design of a Seismically Isolated, Continued Operations Building
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Peter Huber

Speaker - Oral
Seismic Isolation System for Continuous Functionality at the Eskişehir City Hospital
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Armin Bebamzadeh, PhD, Peng

Speaker - Oral
Canada's Parliament Hill Centre Block Base Isolation Seismic Upgrade: Impact of Vertical Ground Motions
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Abel Diaz

Speaker - Oral
Seismic Isolation and Energy Dissipation Enabling Architectural Innovation: The Resilient Design Story of the new Los Angeles County Museum of Art
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Abhinav Bindal

Speaker - Oral
Seismic Isolation and Energy Dissipation Enabling Architectural Innovation: The Resilient Design Story of the new Los Angeles County Museum of Art

June 29, 2022 3:30 PM - 5:00 PM

S.S.22 Wasatch Front URM Risk Reduction Strategy: A Model for Moving Mitigation Forward

Where: Salt Palace: Ballroom A

Session Type: Special Session

This session will present key aspects of the Wasatch Front Unreinforced Masonry Risk Reduction Strategy, including lessons learned from its development and implementation. Published in March 2021 by FEMA, the Utah Seismic Safety Commission, and the Utah Division of Emergency Management, the report includes recommendations related to making Utah safer from the risks posed by unreinforced masonry (URM) buildings. Since the report's publication, a coalition of governmental and non-governmental organizations has focused on reducing URM school risk, which was one of the five strategy priorities identified in the report. The coalition has developed the first statewide inventory of K-12 public school URM buildings, developed an outreach and education campaign, and begun preliminary communication with school districts. The inventory is planned to be publicly released in early 2022. The session will be organized as a series of short presentations followed by a panel discussion. Presentations will focus on partnerships and complimentary work across different scales (regional, state, local) and technical disciplines (emergency management, structural engineering, strategic communications). An important message is that progress has taken a sustained, multi-organizational effort-there is no silver bullet, no single group can do it all, and despite good progress, much work remains to be done.

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Jessica S. Chappell, SE

Speaker - Oral
Special Session Presentation Abstract – The Wasatch Front URM Risk Reduction Strategy: K-12 Public School Inventory

John Crofts, MBA

Speaker - Oral
Earthquakes from a State Emergency Manager Perspective
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Sean McGowan, PE

Speaker - Oral
Known Unknowns: How We Inventoried All K-12 Public Unreinforced Masonry Schools in Utah (in Nine Months!)
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Justin Moresco

Speaker - Oral
Wasatch Front URM Risk Reduction Strategy: A Model for Moving Mitigation Forward
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Matt Wagner

Speaker - Oral
Understanding Perception of Earthquake Risk Along Utah’s Wasatch Front
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Barry H. Welliver, BS

Speaker - Oral
URM Risk Reduction History in Utah

June 29, 2022 3:30 PM - 5:00 PM

S.S.23 Facilitating Cloud Computing in Natural Hazards via DesignSafe Use-Cases

Where: Salt Palace: Ballroom C

Session Type: Special Session

The DesignSafe cyberinfrastructure has been developed to enable and facilitate transformative research in natural hazards engineering, which necessarily spans across multiple disciplines and can take advantage of advancements in computation, experimentation, visualization, and data analysis. DesignSafe facilitates cloud-based workflows that enable users to make discoveries that were previously unattainable. The degree of adoption of cloud-based computing varies across the natural hazards engineering community. To support more widespread adoption of cloud computing resources, DesignSafe has formed use-case teams to develop and document example workflows. Use-case teams have been tasked with focusing on experimental data, Jupyter workflows, visualization, and high-performance computing. The proposed session will present use-cases that span all four of these aspects, including (1) validation of computational simulations with experimental data for concrete walls, (2) use of relational databases in a Jupyter workflow for soil liquefaction assessment, (3) in-situ visualization for landslide hazards, (4) machine learning applications in regional seismic risk assessment, and (5) application of high performance computing to regional site response analysis. The use-cases presented in the session will be fully documented and ready for deployment as starting points for other users to develop their own workflows.

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Scott J. Brandenberg, Ph.D.

Speaker - Oral
 
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Ellen M. Rathje, Ph.D., PE

Speaker - Oral
Facilitating Cloud Computing in Natural Hazards via DesignSafe Use-Cases

Krishna Kumar, PhD

Speaker - Oral
Launching interactive High-Performance Computing MPM simulations of landslides using Jupyter in DesignSafe
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Laura N. Lowes, PhD

Speaker - Oral
Using NHERI SimCenter Software and NHERI DesignSafe Computing Resources to Calibrate an OpenSees Model for Reinforced Concrete Walls
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Raul Rincon

Speaker - Oral
KSeismic Reliability Analysis of Complex Structural Systems using System-Level Surrogate Models
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Scott J. Brandenberg, Ph.D.

Session Organizer
 
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Pedro Arduino

Speaker - Oral
DesignSafe use-case: Constitutive model parameter calibration and site response analysis using integrated SimCenter tools and DesignSafe infrastructure

June 29, 2022 3:30 PM - 5:00 PM

S.S.25 Coordination of Post-Earthquake Reconnaissance by the Research and Professional Communities

Where: Salt Palace: 250 DEF

Session Type: Special Session

The organizational structure behind post-earthquake reconnaissance has changed dramatically in recent years. EERI was traditionally the principle organizing body for the reconnaissance of major US events, and some foreign events as well, with other entities taking the lead on certain specific topical areas (e.g., GEER for geotechnical issues). In recent years, NSF has funded multiple 'extreme event reconnaissance/research' (EER) networks, including a coordinating organization for the EERs (CONVERGE). Whereas these organizations have a research focus, others like the EERI Learning from Earthquakes Program (EERI-LFE) also have a professional focus. With this growth in the number of organizations that may respond to future events, there is a practical need to establish clarity on the aims and roles of different organizations before the next major US event occurs. This session will bring together leaders of the NSF-funded EERs, federal agencies involved in post-disaster response, and EERI-LFE. Each panelist will make introductory remarks pertaining to their organization (5 min each), followed by audience questions and discussion. Discussion topics will include the development of a shared vision and understanding of the roles of different organizations, the importance of inclusive pre-event planning, and next steps needed to realize the vision (MOUs, workshops, etc.).

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David Frost, Ph.D.

Speaker - Oral
GEER Response to Major Disastrous US Earthquake

Gavin P. Hayes, PhD

Speaker - Oral
U.S. Geological Survey Coordination of Post-Earthquake Investigations
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Tracy L. Kijewski-Correa, PhD

Speaker - Oral
An Overview of StEER’s Tiered Response to Major Earthquakes

Steven L. McCabe, Ph.D.

Speaker - Oral
The Federal Role in Post-Earthquake Reconnaissance and Response
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Mike Mieler, PhD

Speaker - Oral
EERI-LFE's Past, Present, and Future Role in Earthquake Reconnaissance
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Lori Peek, PhD

Speaker - Oral
CONVERGE: Communicating, Coordinating, and Collaborating Across Disciplinary Boundaries in Earthquakes
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Jonathan P. Stewart, Ph.D., PE

Speaker - Oral
CONVERGE: Communicating, Coordinating, and Collaborating Across Disciplinary Boundaries in Earthquakes
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Joseph Wartman, PhD, PE

Speaker - Oral
RAPID Facility Support of Post-Earthquake Reconnaissance Investigations

June 29, 2022 3:30 PM - 5:00 PM

S.S.26 No Longer Just a Research Idea - Rocking Technologies as a Practical Approach to Achieving Functional Recovery

Where: Salt Palace: 251 DEF

Session Type: Special Session

Despite progress made in the development of building codes that protect lives, communities continue to face costly and sometimes lengthy recoveries following major earthquakes. For example, after the 2011 Christchurch Earthquake, the central business district was cordoned off for several years and approximately 70 % of the building stock was demolished. The Christchurch experience highlights the limitations of traditional earthquake-resistant design practice that relies on damageable structural 'fuses'. The present surge of interest in designing for post-earthquake functionality has created the opportunity for innovative approaches to be brought into the mainstream of structural design. Rocking structural systems are designed with deformable connections that minimize structural damage and offer a cost-effective solution to recovery-based design. Their feasibility has been demonstrated through extensive peer-reviewed research and implementation in buildings and bridges. This special session explores the question: what is hindering wider implementation of rocking technologies? Industry experts will discuss past research and successful implementations of rocking technologies and introduce coordinated research efforts to characterize the lifecycle benefits of rocking systems over conventional systems. Panelists will provide perspectives on the development of design guidelines and standards; technical knowledge gaps; socioeconomic considerations; and challenges that need to be addressed to motivate wider implementation.

Nicos Makris, Ph.D

Speaker - Oral
Multistory Buildings Coupled with Rocking Walls: An Effective Strategy to Reduce Seismic Displacements and Achieve Functional Recovery
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David C. Mar, MS

Speaker - Oral
Affordable Resilience Using Rocking Walls and Foundation Dampers

Christopher Segura, PhD

Speaker - Oral
No Longer Just a Research Idea - Rocking Technologies as a Practical Approach to Achieving Functional Recovery
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Georgios Tsampras

Speaker - Oral
Practical force-limiting deformable connections in buildings with rocking base mechanism and limited higher-mode responses
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Lydell Wiebe

Speaker - Oral
The New Zealand Design Guide for Controlled Rocking Steel Braced Frames: Successes and Challenges of Implementing Controlled Rocking
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Gregory G. Deierlein, PhD

Speaker - Oral
Seismic Design of Steel-Braced Spine Systems to Promote Functional Recovery

June 29, 2022 3:30 PM - 5:00 PM

T.S.28 Experimental Testing of Structures and Components

Where: Salt Palace: Ballroom B

Session Type: Technical Topic Session

Presentations in this session will focus on laboratory testing of structural components and systems subjected to extreme loads.

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Masahiro Kurata

Moderator
 
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Konstantinos Kalfas

Speaker - Oral
Testing of the Prototype and Sustainable Pressurized Sand Damper for the Response Modification of Structures
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Ken Ishii

Speaker - Oral
Loading Tests for Combined Evaluation of Velocity and Temperature Dependencies of Elastic Sliding Bearings
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Masahiro Kurata

Speaker - Oral
2020 E-Defense Test for Integrated Structural, Nonstructural and Functionality Assessment of Medical Facilities

Sai Sharath Parsi, MS

Speaker Online Only
Some Nuances in Modeling and Control of Servo-Hydraulic Shake Tables
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Keh-Chyuan Tsai, Ph.D.

Speaker - Oral
Experimental Performance of Truss-Confined Buckling-Restrained Braces

Wang-Chuen Lin, PhD

Speaker Online Only
Experimental and Analytical Study on Multiaxial Hysteresis Behavior of High-Damping Rubber Bearings

June 29, 2022 3:30 PM - 5:00 PM

T.S.29 Community Resilience and Functional Recovery

Where: Salt Palace: Ballroom D

Session Type: Technical Topic Session

In this session, presenters will discuss efforts to assess and improve the disaster resilience of communities, and the recovery of structures after earthquake events.

Abbie B. Liel, Professor

Moderator
 
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Nikola Blagojevic

Speaker - Oral
Evaluating NIST Community Disaster Resilience Goals using the iRe-CoDeS Resilience Quantification Framework
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Carlos Molina Hutt, PhD, PE

Speaker - Oral
An Analytical Framework to Assess Earthquake Induced Downtime and Model Recovery of Buildings
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Dustin Cook, PhD

Speaker - Oral
An Analytical Framework to Assess Earthquake Induced Downtime and Model Recovery of Buildings
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Omar Issa, Graduate Student

Speaker - Oral
Optimization framework to support recovery-based design of buildings—preliminary results
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Carlos Molina Hutt, PhD, PE

Speaker - Oral
Evaluating the Earthquake-induced Downtime of Modern Residential Reinforced Concrete Shear Wall Buildings and Assessing Structural Design Strategies for Enhanced Seismic Performance
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Ram Krishna Mazumder, Ph.D.

Speaker Online Only
Community-Level Seismic Functionality Analysis Framework: Integration of Performance of Buildings and Essential Infrastructure Services

June 29, 2022 3:30 PM - 5:00 PM

T.S.30 Ground Motion Simulation, Validation, and Utilization

Where: Salt Palace: 150 G

Session Type: Technical Topic Session

Simulated ground motions can advance seismic hazard and structural response analyses, particularly for conditions with limited recorded ground motions. This session presents studies on simulation of ground motions, their validations for various engineering applications, and example utilizations of simulated ground motions in engineering practice.

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Sean K. Ahdi, Ph.D., P.E.

Moderator
 
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Christine Goulet, PhD

Speaker - Oral
Generation of Broadband Ground Motion From Dynamic Rupture Simulations: A Group Modeling Approach Towards Better Characterizing Seismic Hazard For Engineering Applications
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Jack W. Baker, Ph.D.

Speaker - Oral
Spatial correlation analysis of CyberShake simulations, considering multiple ruptures
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Nicolas Luco, PhD

Speaker - Oral
Lessons Learned from a Decade of Ground Motion Simulation Validation (GMSV) Exercises and a Path Forward
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Maha Kenawy

Speaker - Oral
Seismic Risk to Buildings in the San Francisco Bay Area Predicted by Broadband Physics-based M7.0 Hayward Fault Rupture Simulations
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Yongfei Wang, PhD

Speaker - Oral
Constraining Fault Displacements for Strike-slip Events using Physics-Based Simulations
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Mayssa Dabaghi

Speaker Online Only
Comparison of Different Seismic Fragility Analysis Methods using CyberShake Ground Motions

June 29, 2022 3:30 PM - 5:00 PM

T.S.31 Design, Testing and Construction of Timber Structures

Where: Salt Palace: 250 ABC

Session Type: Technical Topic Session

In this session, presenters will discuss efforts to improve the design and performance assessment of timber structural systems and components.

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Andre R. Barbosa, PhD

Moderator
 
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Alia Amer

Speaker - Oral
Multi-directional Cyclic Response of Self-Centering Cross-Laminated Timber Shear Walls
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Andre R. Barbosa, PhD

Speaker - Oral
Analytical model and finite element modeling strategy for the design and assessment of mass timber diaphragms
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Laxman Dahal

Speaker - Oral
An End-to-End Computational Platform to Automate Seismic Design, Nonlinear Analysis, and Loss Assessment of Woodframe Buildings
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Emily Diedrich

Speaker - Oral
Mass Timber Beam-column Connections for Braced Frame with Mass Timber Buckling Restrained Braces

Gustavo F. Orozco, Graduate Student Researcher

Speaker - Oral
Innovative Mass Timber Seismic Lateral Force Resisting Systems: Testing of a Full-scale Three-story Building with Mass Ply Panels (MPP) Rocking Walls
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Sarah Wichman

Speaker - Oral
Lateral Design of a 10-Story Building Specimen with Mass Timber Rocking Walls

June 29, 2022 3:30 PM - 5:00 PM

T.S.32 Socioeconomic and Environmental Consequences

Where: Salt Palace: 251 ABC

Session Type: Technical Topic Session

This session will feature research from the topics including socioeconomic and environmental consequences of earthquakes and recovery aspects.

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Rodrigo Costa

Moderator
 
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Rodrigo Carneiro da Costa, PhD

Speaker - Oral
Challenges and Opportunities in Post-disaster Housing Recovery Simulations
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Gemma J. Cremen, PhD

Speaker - Oral
A Novel People-Centered Approach to Modeling and Decision Making on Future Earthquake Risk
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Emily Mongold

Speaker - Oral
Simulating Post-Disaster Landlord Residence and Rental Unit Recovery
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Jimmy Zhang, MS

Speaker - Oral
Enhancing Post-Disaster Recovery Modeling Through High-Fidelity Household Income Estimation

Adam Zsarnóczay, Ph.D.

Speaker - Oral
Towards the Integration of Socioeconomic Impact and Recovery Modeling into High-Resolution Regional Earthquake Simulations

Max T. Stephens, PhD

Speaker - Lightning
The Environmental Consequences of Earthquake Damage to Buildings
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Chenbo Wang, M.Sc.

Speaker - Lightning
Assessing Post-disaster Housing Needs to Inform Disaster Recovery Planning
stanfordpic cropped2

Francisco A. Galvis, PhD Candidate

Speaker - Lightning
Seismic assessment of pre-Northridge welded steel moment frame buildings and implications on community resilience

June 29, 2022 3:30 PM - 5:00 PM

T.S.53 Novel Post-Earthquake Assessment Analysis and Modeling Techniques

Where: Salt Palace: 151 G

Session Type: Technical Topic Session

 

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Derek A. Skolnik

Moderator
 
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Wenyang Zhang, PhD

Speaker - Oral
Effects of simulation frequency and surface topography on physics-based large-scale earthquake ground motion simulation: an application to Istanbul
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Bret N. Lingwall, PhD

Speaker - Oral
Evaluation of Ground Motion Hazard Analyses Compared to Recorded Ground Motions for the 2020 Magna, Utah Earthquake
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Bret N. Lingwall, PhD

Speaker - Oral
Evaluation of Site Response Analyses Compared to Recorded Ground Motions for the 2020 Magna, Utah Earthquake
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Bruce Maison

Speaker - Oral
Mobile home damage in 2020 Magna earthquake
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Derek A. Skolnik

Speaker - Oral
A Novel Tool for Supporting Immediate Post-Earthquake Decision-Making
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David J. Wald, PhD

Speaker - Oral
Integrated Strategies for Enhanced Rapid Earthquake Shaking, Ground Failure, and Impact Estimation Employing Remotely Sensed and Ground Truth Constraints

THURSDAY, JUNE 30, 2022

June 30, 2022 8:30 AM - 9:30 AM

P.S.03 2022 William B. Joyner Lecture: The Future of Earthquake Impact Estimation

Where: Salt Palace: Ballroom E-J

Session Type: Plenary

The 2022 William B. Joyner lecture will feature a combined seismological and earthquake engineering view of future earthquake impact, response, and recovery tools and assessments. Impact estimation requires considering uncertain models and data since the main components-namely shaking, exposure, and vulnerabilities-entail inherent uncertainties. Since actionable response or planning requires confidence in our results, improvements in our loss calculations will require continued seismological and engineering collaboration and expanded tools to reduce modeling uncertainties. Future rapid initial impact and secondary hazard modeled estimates will be holistically integrated with crowd-sourced and remotely sensed observations for a more accurate view of the consequences. Further advancements in remote sensing, rapid in-situ monitoring and impact reporting, and machine learning will allow for innovative data-fusion strategies that integrate with existing models and significantly improve the accuracy and spatial resolution of rapid shaking and loss estimates. In addition, some key new contributing datasets-if combined-could radically improve our loss estimate capabilities. Among others, such datasets include global building footprints and inventories, better ShakeMap macroseismic constraints, early reports of fatalities for Bayesian updating, and structural health monitoring. Many of the same tools and strategies needed for real-time loss estimates are also applicable for long-term loss and risk assessments.

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David J. Wald, PhD

Speaker - Oral
 

June 30, 2022 10:00 AM - 11:30 AM

S.S.27 Seismic Sleuthing: Navigating FEMA Programs to Understand and Reduce Your Seismic Vulnerability

Where: Salt Palace: Ballroom A

Session Type: Special Session

Inventory and data collection projects are the foundation to mitigation planning. Inventories can measure dynamic and interconnected systems that play a critical role in functional recovery. In these cases, benefits to resilience can only be evaluated in the context of the overall network of data users (e.g., common Operational DATA rather than common operational picture). While data collection falls heavily on local agencies and communities, other stakeholders, such as federal or state agencies, academic researchers, nonprofit staff, and consultants, can step in and share the load by providing technical assistance or other resources. Cross-sector and intragovernmental collaboration are key components in developing and executing an actionable inventory or data collection plan. In some instances, these conversations are siloed, as projects may be designed and geared toward limited audiences, resulting in barriers to sharing and using this information more broadly. However, when optimized, these projects have the power to drive decision-making across departments, jurisdictions, and regional areas. Additional strategies to leverage the value of inventory data include: Collaborate across silos and organizations; Use existing data sets; Standardize the data in a way that makes sense for your audience; Consider adding another dimension to inventory projects, such as interconnected networks or multi-use.

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Amanda C. Siok, Master of Urban Planning- MUP

Speaker - Oral
Seismic Sleuthing: Navigating FEMA’s Programs to Understand and Reduce Your Seismic Vulnerability

Anne Rosinski, MS

Speaker - Oral
Leveraging Inventory Data For Earthquake Mitigation
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Sean McGowan, PE

Speaker - Oral
How’d You Fund That?: Making Earthquake Mitigation Project Dreams a Reality

Janell J. Woodward, BS

Speaker - Oral
 

June 30, 2022 10:00 AM - 11:30 AM

S.S.28 Functional Recovery as Public Policy: How it Started, How it's Going, and Where it Goes from Here

Where: Salt Palace: Ballroom D

Session Type: Special Session

Building on the global resilience movement of the last decade, EERI produced a 2019 white paper titled 'Functional Recovery: A Conceptual Framework with Policy Options.' Since then, the subject of functional recovery as a basis for earthquake design has been taken up approvingly by NEHRP, FEMA, NIST, ICC, and even the U.S. Congress. In terms of actual policy, San Francisco, Los Angeles, and the State of Oregon have used their resilience plans to emphasize functional recovery in earthquake planning and design. In California, Assembly Bill 1329 would have put the state on a path to having functional recovery provisions in its 2025 building code. Proposals have also been made to address limited functional recovery goals in the 2024 International Building Code. Most of these efforts, however, have stalled. Why? And what can (or should) be done to revive them? In this special session, a panel of experts directly involved in the recent policy-making efforts will describe the various processes, opportunities, and roadblocks that characterized their work. With lessons learned, and with ample audience participation, they will discuss potential new efforts to move the idea of designing for functional recovery from concept to actual policy.

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David Bonowitz, S. E.

Speaker - Oral
Functional Recovery as Public Policy: How it Started, How it's Going, and Where it Goes from Here
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David Bonowitz, S. E.

Speaker - Oral
Functional Recovery as Public Policy: The State of Play
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Michael K. Harryman, MA

Speaker - Oral
Functional Recovery as Public Policy: Oregon Resilience Plan – Resiliency to Recovery

Ryan Kersting

Speaker - Oral
Functional Recovery as Public Policy: Leveraging Past Experiences and Maximizing Current Resources to Identify Effective Paths Forward

June 30, 2022 10:00 AM - 11:30 AM

S.S.29 Earthquake Reconnaissance with Advanced Technologies

Where: Salt Palace: 250 DEF

Session Type: Special Session

Session Objectives: Present use cases for advanced natural hazard data collection technologies such as terrestrial lidar and un-crewed aerial systems. Discuss the benefits and challenges of integrating the technologies in reconnaissance with a panel of experts. Highlight the depth and breadth of the data that can be collected and discuss the data's role in improving our understanding of earthquakes and their impacts. Raise interest in the capabilities of the technology and the availability of previously collected data sets to spur future research and continued evolution of reconnaissance science.

Panel Discussion Topics: The panel discussion will be guided the moderators who are affiliated with the NHERI RAPID Facility. Topics will include: field reconnaissance planning with advanced equipment, breakthroughs enabled by the advanced technologies, lessons learned, and technology enabled opportunities to collect reconnaissance data with multi- or interdisciplinary importance.

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Jeffrey W. Berman, Ph.D.

Speaker - Oral
Earthquake Reconnaissance with Advanced Technologies
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Scott J. Brandenberg, Ph.D.

Speaker - Oral
Fault Rupture and Liquefaction Feature Mapping with Unmanned Aerial Systems after the Ridgecrest Earthquake Sequence
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alex grant

Speaker - Oral
Capturing liquefaction settlement with lidar after the Hokkaido earthquake
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Alexandra Hain, PhD

Speaker - Oral
Advanced Imaging for the Evaluation of Multi-Hazard Damages to Puerto Rico’s Infrastructure - Investigation of the Interaction of Hurricane Maria and the 2020 Earthquake Sequence
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Lucas S. Hogan, PhD

Speaker - Oral
Use of digital technologies to capture structural damage following the Kaikoura earthquake

June 30, 2022 10:00 AM - 11:30 AM

T.S.33 Nonlinear Modeling of Damage in Structures

Where: Salt Palace: Ballroom B

Session Type: Technical Topic Session

This session showcases a collection of studies which focus on the numerical modeling of the damage mechanisms in structures subjected to extreme loads.

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Kevin Wong

Moderator
 
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Anil K. Chopra, Professor, PhD

Speaker - Oral
Modeling Viscous Damping in Nonlinear Response History Analysis of Steel Moment-Frame Buildings
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Seyed Mohammadreza Farooghi Mehr

Speaker - Oral
Effects of Friction on the Dynamic Behavior of Flexible Rocking Bodies
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Amanpreet Singh

Speaker - Oral
Correlating Fastener Damage to Hysteretic Response and Performance Levels in Steel Sheet Sheathed CFS Wall-lines
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Andrew Ziccarelli

Speaker - Oral
Finite Element Simulation of Earthquake-Induced Ductile Crack Propagation in Steel Structures

Junwei Liu

Speaker Online Only
Numerical Modeling of Shear Fuse Connections in Special Moment Frames
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Ioannis Koutromanos, PhD

Speaker Online Only
Experimental Program And Novel Simulation Scheme For Characterizing Low-Cycle Fatigue Rupture In Structural Steel
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Takaya Nakamura

Speaker - Lightning Online Only
Deformation Capacity of Shear-failing Reinforcement Concrete Columns

June 30, 2022 10:00 AM - 11:30 AM

T.S.34 Geotechnical Applications for Professional Practice and Performance-Based Design

Where: Salt Palace: Ballroom C

Session Type: Technical Topic Session

The application of new methods and performance-based design to engineering practice constitutes an important element of applied research. This session presents applications of innovative and/or performance-based design approaches to real-world projects and the lessons learned.

Kevin W. Franke, PhD

Moderator
 
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James Bantis, PhD

Speaker - Oral
Damping Modification Factors for Structures Built on Soft Soils
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Patrick C. Bassal

Speaker - Oral
Dynamic Analyses of Localized Ground Deformation at Wynne Avenue in the Northridge Earthquake
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Brady R. Cox

Speaker - Oral
Modeling 2D and 3D Site Effects at the Treasure Island Downhole Array Using Seismo-VLAB and a Site-Specific 3D Vs Model
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Chenying Liu

Speaker - Oral
Performance-based Seismic Assessment of Slope Systems Using Machine Learning
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Andrew J. Makdisi, PhD, PE

Speaker - Oral
A Geohazards Analog to Risk-Targeted Design Ground Motions

June 30, 2022 10:00 AM - 11:30 AM

T.S.35 Ground Motion Characterization and Seismic Demands

Where: Salt Palace: 150 G

Session Type: Technical Topic Session

Presentations featured in this session will focus on assessments of ground motion intensity, seismic demands on structures, and the impacts of vertical ground motion components.

Luis F. Ibarra

Moderator
 
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Andres A. Acosta, Ph.D.

Speaker - Oral
Dynamic behavior of buildings in the vertical component of motion
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Mahsa Hosseini, Master of Science

Speaker - Oral
Impact of Vertical Ground Motions on Gravity Load-Resisting System in RC Tall Buildings
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Christopher J. Wong

Speaker - Oral
A Comprehensive Type-oriented Algorithm for Baseline Correction of Acceleration Time Histories
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Boris Jeremic

Speaker - Oral
Base Slab Averaging and Inelastic Effects in Soil-Structure Interaction Behavior of Mat-Slab Founded Structures, Effects on Reduction of Seismic Demand
1 derek Pacheco

Derek Rodriguez Pacheco, PhD Candidate

Speaker - Oral
A Multivariate Regression Model for Strong Floor Motion Duration

Jessica S. Thangjitham

Speaker - Oral
Earthquake Intensity Measure for Peak Tensile Strain of RC Bridge Columns

June 30, 2022 10:00 AM - 11:30 AM

T.S.36 Machine Learning and Artificial Intelligence: Earthquake Engineering Applications

Where: Salt Palace: 151 G

Session Type: Technical Topic Session

The advancement and application of machine learning and AI techniques applied to a wide variety of structural and geotechnical engineering applications will demonstrate its powerful capability to advance earthquake engineering analyses and design.

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Rabie Farrag, PhD

Moderator
 
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Zeynep Tuna Deger, Ph.D.

Speaker - Oral
An explainable meta-modeling approach to investigate the energy behavior of reinforced concrete structural walls

Jawad Fayaz

Speaker - Oral
ROSERS - Real-time On-Site Estimation of Response Spectra
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Amin Hariri, PhD

Speaker - Oral
Probabilistic Moment Curvature Analysis using Random Forest Based Ensemble Regression
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Pouria Kourehpaz, PhD Student

Speaker - Oral
Machine Learning for Enhanced Seismic Damage Assessment of Buildings
brett maurer

Brett Maurer

Speaker - Oral
A Preliminary US National Vs30 Model and Map Informed by Remote Sensing and Machine Learning
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Aidin Tamhidi, M.Sc.

Speaker - Oral
Rapid Structural Model Development for Soft-Story Buildings Using Deep Learning Image Classification
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Luis A. Bedriñana, PhD

Speaker - Lightning Online Only
Ensemble Machine Learning Models for the Shear Strength Estimation of PC Beams

Peng-Yu Chen

Speaker - Lightning Online Only
Image-based deep-learning models for assisting data-harvesting in regional seismic resilience evaluation

June 30, 2022 10:00 AM - 11:30 AM

T.S.37 Performance of Masonry Structures

Where: Salt Palace: 250 ABC

Session Type: Technical Topic Session

Presentations in this session will discuss the seismic performance of masonry structures, and the latest efforts to enhance the performance of masonry walls using engineered cementitious composites

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Eleni Smyrou

Moderator
 

Aanisa Ms. Gani

Speaker - Oral
Dynamic Characterization of Timber Frame of Traditional Masonry-filled Construction
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Mohammed Mehdi Kashani, PhD

Speaker - Oral
SEISMIC PERFORMANCE OF NEPALESE SCHOOLS: A FULL-SCALE TEST OF A TYPICAL UNREINFORCED MASONRY WALL
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Subodh Kumar, Ph.D..

Speaker - Oral
Performance of Confined Masonry Walls Retrofitted with Engineered Cementitious Composites (ECC) Overlay under In-plane Cyclic Loading
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Eleni Smyrou

Speaker - Oral
Out-of-plane Shake Table Tests on Masonry Walls Representing Groningen Houses
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Rajat Mr. Avasthi, PhD

Speaker - Lightning
Numerical Modeling and Experimental Validation of Small-Scale Masonry Arches
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Subodh Kumar, Ph.D..

Speaker - Lightning
Enhancing the Performance of Unreinforced Masonry (URM) Walls using Engineered Cementitious Composites (ECC) Overlay
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LAKSHMI L, PhD Scholar

Speaker Online Only
In-plane Behaviour Of Semi-confined Brick Masonry: Numerical Study

June 30, 2022 10:00 AM - 11:30 AM

T.S.38 Risk and Loss Assessment

Where: Salt Palace: 251 ABC

Session Type: Technical Topic Session

This session focuses on new developments and applications on risk and loss assessment.

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Mehmet Unal, Ph.D.

Moderator
 
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Lydell Wiebe

Speaker - Oral
Modeling Repairs in FEMA P-58: Different Interpretations and their Influence on Loss Estimates
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Robert E. Chase, PhD

Speaker - Oral
Earthquake Scenario Development in the 2023 USGS NSHM Update
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Tiegan E. Hobbs, PhD

Speaker - Oral
The First Public National Canadian Seismic Risk Model: Scientific Underpinnings and Preliminary Results for the Pre-release
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Janise Rodgers, PhD

Speaker - Oral
Effectiveness of Earthquake Scenarios in Motivating Mitigation: Initial Results
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Caroline J. Williams

Speaker - Oral
A Changing Regional Housing Inventory and the Effects on Natural Hazard Risk
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Carlos Mesta, MSc

Speaker - Lightning
Quantifying the Potential Benefits of Some Risk-mitigation Strategies on Future Seismic Losses in Kathmandu Valley
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Marco A. MA. Santos-Santiago, MSC

Speaker - Lightning
Optimal Design of a Building with Energy Dissipation Devices, Considering Two Independent Hazards
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Satwik P. Rayjada

Speaker - Lightning Online Only
The Effect of Uncertainty in Defining Limit States on Seismic Life Cycle Cost Assessment

June 30, 2022 10:00 AM - 11:30 AM

T.S.39 Seismic Retrofit of Existing Structures

Where: Salt Palace: 251 DEF

Session Type: Technical Topic Session

This session focuses on the seismic evaluation, retrofit and repair of existing buildings. Attend this session to learn about the history of and new approahces to seismic retrofit practice.

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Kent Yu

Moderator
 
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Michael G. Mahoney

Speaker - Oral
Federal Emergency Management Agency’s Seismically Hazardous Existing Building Program
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Ezra Jampole, PhD

Speaker - Oral
Distinguishing Between Earthquake-Induced and Pre-Existing Conditions in Older Buildings Following Earthquakes
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Matthew Skokan

Speaker - Oral
Seismic Retrofit of a 17-Story Non-Ductile Concrete Core Wall Tower with Mega Column Outriggers Using CFRP and State-of-the-Art Research
masume dana

Masume Dana, M.Eng.

Speaker - Oral
Transformation Story of a Historic Landmark Museum to a Biosciences Incubator
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Sandesh Aher

Speaker - Oral
A Module to Capture ASCE 41 URM Mechanisms in Perform-3D to Analyze and Retrofit 3D Buildings for World Bank Retrofit Program in Kyrgyzstan

Ihsan Engin I. Bal, Dr

Speaker Online Only
An Interdisciplinary Approach for a Communal Seismic Strengthening Project: “Experiment Krewerd” in Groningen

June 30, 2022 12:15 PM - 1:00 PM

C.M.15 EERI Washington Regional Chapter Meeting

Where: Salt Palace: 254 ABC

Session Type: Chapter Meetings

General update on chapter activities and initiatives, and an open discussion about ideas for improving member value. This meeting is open to all conference attendees.

 

June 30, 2022 1:30 PM - 3:00 PM

S.S.30 FEMA Natural Hazard Retrofit Program Toolkit - Overview, How to use it, and Pitfalls to avoid

Where: Salt Palace: Ballroom A

Session Type: Special Session

Inventory and data collection projects are the foundation to mitigation planning. Inventories can measure dynamic and interconnected systems that play a critical role in functional recovery. In these cases, benefits to resilience can only be evaluated in the context of the overall network of data users (e.g., common Operational DATA rather than common operational picture). While data collection falls heavily on local agencies and communities, other stakeholders, such as federal or state agencies, academic researchers, nonprofit staff, and consultants, can step in and share the load by providing technical assistance or other resources. Cross-sector and intragovernmental collaboration are key components in developing and executing an actionable inventory or data collection plan. In some instances, these conversations are siloed, as projects may be designed and geared toward limited audiences, resulting in barriers to sharing and using this information more broadly. However, when optimized, these projects have the power to drive decision-making across departments, jurisdictions, and regional areas. Additional strategies to leverage the value of inventory data include: Collaborate across silos and organizations; Use existing data sets; Standardize the data in a way that makes sense for your audience; Consider adding another dimension to inventory projects, such as interconnected networks or multi-use.

djb headshot 191118 img 3264

David Bonowitz, S. E.

Speaker - Oral
FEMA Natural Hazard Retrofit Toolkit: A Few Thoughts on How to Improve It
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Janiele J. Maffei, S. E.

Speaker - Oral
FEMA Natural Hazard Retrofit Program Toolkit: EBB - An Example of Leveraging Local Hazard Mitigation Funds with FEMA Grants
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Mary Witucki

Speaker - Oral
Natural Hazard Retrofit Program Toolkit

Anne Rosinski, MS

Speaker - Oral
Leveraging Inventory Data For Earthquake Mitigation

Anne Rosinski, MS

Session Organizer
Leveraging Inventory Data For Earthquake Mitigation

June 30, 2022 1:30 PM - 3:00 PM

S.S.31 Blind Prediction Contests and the Essential Insights They Provide: Part 1

Where: Salt Palace: Ballroom B

Session Type: Special Session

Large damaging earthquakes are rare and unpredictable, and thus so too are the opportunities for earthquake engineers to test their assumptions and learn how well they are doing. A great way to add to our chances for learning opportunities is with blind prediction contests. Such contests provide practitioners, researchers, and students an opportunity to see what the 'true answer' is compared to predictions of building code equations, research recommendations, or analytical modeling. Typically, the contests have been structural engineering predictions of the failure of a test specimen. There have also been contests related to geotechnical engineering and lifelines. Predicted quantities can include strength, stiffness, behavior mode, mechanism, and deformation or ductility capacity. Every day earthquake engineers evaluate and design structures and infrastructure lifelines. They do this based on standards derived from principles and research, including layers of assumptions. It is unlikely that in their lifetime their work will be tested at demands close to maximum or design earthquake levels. However, with blind prediction contests, engineers and researchers have a way, at least within the prescribed scope of a test specimen, to see how well their best prediction matches the true answer of a test result.

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Vesna Terzic

Session Organizer
Blind Prediction Contests and the Essential Insights They Provide
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Joe Maffei

Speaker - Oral
Blind Prediction Contests and the Essential Insights They Provide
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Lawrence A. Burkett

Speaker - Oral
Blind Prediction of Shear Strength for Existing Concrete Columns
abby enscoe

Abby Enscoe

Speaker - Oral
Blind Prediction of Shear Strength for Existing Concrete Columns
1 bentz

Evan C. Bentz, PhD

Speaker - Oral
A Blind-Prediction Contest for the Strength and Behavior of the Deepest Shear Test Ever Performed (so far)
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Jerry Y. Zhai

Speaker - Oral
Blind Prediction Competition of a Full-Scale Shear-Critical Reinforced Concrete Mat Foundation Slice
jrm 2016 edit 2

Joe Maffei

Session Organizer
Blind Prediction Competition of a Full-Scale Shear-Critical Reinforced Concrete Mat Foundation Slice
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Kenneth A. Ogorzalek

Speaker - Oral
Damage and Functionality Prediction of Nonstructural Equipment in Hospital Buildings Based on Full Scale Experimental Shake Table Tests

June 30, 2022 1:30 PM - 3:00 PM

S.S.35 Leveraging the Virtual Classroom: Inspiring the Next Generation of Earthquake Engineers

Where: Salt Palace: Ballroom E-J

Session Type: Special Session

This session will focus on the benefits of using hands-on activities and personal experiences to encourage careers in engineering. A group of female PhD students in NC State's EERI chapter hosted a series of events to promote engineering amongst young girls. Some examples of using hands-on activities occurred at a Girls in Science Camp. The first lesson gave an overview of what a civil engineer does. The next lesson focused on what makes a good bridge design. With this knowledge, the campers were tasked with building the strongest bridge at the lowest cost from pasta and marshmallows. The last lesson provided an overview of geotechnical engineering. The campers were shown how to cause liquefaction on the foundation of structures, like the bridges they had just built. This demonstration showed the importance of strong soil to hold the weight of our structures, especially for extreme events. In the end, the students were able to link why building materials and foundations are important in the design of structures and how extreme events can impact designs. This event and virtual talks, as part of an Experimenters Program, focus on fostering an inclusive environment by discussing real-life experiences of females in engineering.

kayla sorenson headshot

Kayla Sorenson, MS

Speaker - Oral
Incorporating Hands-on Activities into an Undergraduate Geotechnical Engineering Course During Remote Learning

Jessica S. Thangjitham

Speaker - Oral
Educational Outreach at Girls in Science Summer Camp

Megan Vandervort

Speaker - Oral
Leveraging the Virtual Classroom: Girls in Engineering Outreach at University of California, Berkeley

Eddie Vega

Speaker - Oral
Leveraging the Virtual Classroom: Inspiring the Next Generation of Earthquake Engineers
abehrouzi headshot

Anahid Behrouzi, PhD

Session Organizer
Leveraging the Virtual Classroom: Inspiring the Next Generation of Earthquake Engineers
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Sarah Navias

Speaker - Oral
Hands-on Earthquake Engineering Curriculum for the Virtual Classroom

June 30, 2022 1:30 PM - 3:00 PM

S.S.37 Using Surveys after a Disaster to Understand Business and Community Resilience

Where: Salt Palace: 250 DEF

Session Type: Special Session

This special session addresses efforts to survey businesses following major disasters with the goal of understanding how structural and nonstructural components of buildings and other factors (from disaster insurance through community characteristics and response) affect the resilience of businesses following disasters. The panel brings together engineers and social scientists involved in launching post-disaster business surveys over the past decade, including surveys in Christchurch, NZ, EERI's pilot efforts following earthquakes in Napa, CA, Cushing, OK, and Anchorage, AK, and surveys following hurricanes and during the COVID-19 pandemic.

Jennifer Helgeson

Speaker - Oral
10083 Using Surveys after a Disaster to Understand Business and Community Resilience special session.
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Cynthia Kroll, PhD

Speaker - Oral
Using Surveys After A Disaster to Understand Business and Community Resilience--Panel Overview
mike mieler 2017 alternate reduced

Mike Mieler, PhD

Speaker - Oral
Overview of EERI Business Resilience Survey Tool and Challenges in Validating Engineering Downtime Models

Maria Watson, PhD

Speaker - Oral
Business Surveys and Increasing Complexity: Challenges, Lessons, and Collaborations
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Anne M. Wein

Speaker - Oral
Reflection on Learning about Business Resilience from Earthquakes
yxiao

Yu Xiao, Ph.D.

Speaker - Oral
Process of Developing Business Survey Questionnaires
cbrown pic

Charlotte Brown, PhD

Speaker - Oral
A decade of earthquakes in New Zealand: understanding business impacts and behaviours

June 30, 2022 1:30 PM - 3:00 PM

T.S.40 Soils, Foundations, Earth Retention Systems, underground infrastructure

Where: Salt Palace: Ballroom C

Session Type: Technical Topic Session

Understanding how seismic loading impacts soil and various geotechnical structures including retaining walls and foundations is critical for a geotechnical engineer. This session presents advances in our understanding and modeling of the seismic response of such systems.

makdisi rectangular

Andrew J. Makdisi, PhD, PE

Moderator
 
trevor carey

Trevor Carey, PhD

Speaker - Lightning
Seismic Soil-Structure-Interaction Analyses of Simplified Bridge Models
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Brady R. Cox

Speaker - Oral
In-situ Estimation of Small Strain Damping Ratio at the Garner Valley Downhole Array using MASW Testing
chanseok jeong

Chanseok Jeong, PhD

Speaker - Lightning
Reconstruction of Seismic Ground Motions inside a Domain Reduction Method Boundary in a PML-truncated domain
gunwoong kim photo

Gunwoong Kim, MS

Speaker - Oral
Evaluation of Lateral Variability in Vs Profiles at Geotechnical Sites using the Improved Spectral-Analysis-of-Surface-Waves (SASW) Method
1 croppedimage

Naresh Subedi, M.Eng.

Speaker - Oral
Evaluation of Stress-strain Models to Calculate Moment Capacity of Concrete-filled Steel Tube Piles
steve xu

Zhongze Xu, MS

Speaker - Oral
New Families of Empirical Models for the Prediction of Shear Wave Velocity Profiles of Uncemented Cohesionless and Cohesive Soils
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Paola Isabel ITA, MSc

Speaker Online Only
Experimental And Numerical Evaluation Of Out-Of-Plane Seismic Performance Of Traditional Dry Stone Retaining Walls In The Central Andes Region

Mario Ordaz, Dr.

Speaker - Lightning Online Only
Considering site-effects in event-based PSHA

June 30, 2022 1:30 PM - 3:00 PM

T.S.41 Equity, Resilience and Policymaking

Where: Salt Palace: Ballroom D

Session Type: Technical Topic Session

This session focuses on various policy related efforts on earthquake resilience with particular attention to issues of community inclusion, equity, justice.

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Yolanda Lin, PhD

Moderator
 
meganbostonpic

Megan Boston, PhD

Speaker - Oral
Integrating Maori Perspectives into Community Resilience Frameworks for the Built Environment
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Yuzuka Kashiwagi

Speaker - Oral
Trade Disruption and Behavior: Evidence from the 2018 Sulawesi Earthquake
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Gah-Kai Leung, BA, MA

Speaker - Oral
The Environmental Harms of Earthquakes: An Ethical Analysis of the Impact of Earthquakes on the Non-Human World
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Robert M. de Groot, PhD

Speaker - Oral
ShakeAlert: A People-Focused Earthquake Early Warning System
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Matthew K. Wood, M.S. in Geology

Speaker - Oral
Earthquake Early Warning: Toward Modeling Optimal Protective Actions
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Evan Reis, SE

Speaker - Oral
The USRC E4 Principle – Engineering in the Service of Equity, the Environment and our Economy

June 30, 2022 1:30 PM - 3:00 PM

T.S.42 Analysis and Design of Bridge Structures

Where: Salt Palace: 150 G

Session Type: Technical Topic Session

This session showcases several studies on assessing the seismic performance of bridge structures and components using numerical models and laboratory tests.

Chris EN. Pantelides

Moderator
 
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Miles Akbarnezhad

Speaker - Oral
Seismic Performance Assessment of Bridges of SMA-Restrained Rocking Columns
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Homero F. Carrion Cabrera, MSc

Speaker - Oral
Longitudinal Seismic Response of Regular Multi-span Bridges having Buckling-Restrained Braces in Bi-directional ductile end diaphragm
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Andrea A. Franchini, BSc, MSc

Speaker - Oral
Competing seismic-safety and sustainability goals in cable-stayed bridge optimisation
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Chris P. Pantelides, Ph.D, SE, FACI

Speaker - Oral
Numerical Modeling of Bridge Piers Used In Accelerated Bridge Construction
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Ali Shokrgozar

Speaker - Oral
Analytical Modeling and Parametric Study of an Innovative Earthquake Resistant Precast Pier System
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Kuanshi Zhong, PhD

Speaker - Oral
Seismic Design Strategies for Bridge Columns Under Earthquake Duration Effects

June 30, 2022 1:30 PM - 3:00 PM

T.S.43 Machine Learning Applications in Structural Engineering

Where: Salt Palace: 151 G

Session Type: Technical Topic Session

In this session, presenters will discuss several applications of data science and machine learning in assessing the performance of structures and quantifying the associated uncertainties.

Stephanie G. Paal, PhD

Moderator
 
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Muneera Aladsani

Speaker - Oral
A Reliability-Based Approach to Quantify the Benefits of Machine Learning Predictive Models in Terms of the Reduced Uncertainty
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Xiao Liang

Speaker - Oral
Hybrid multi-objective architecture for spatiotemporal structural health monitoring
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Siddharth S. Parida, PhD

Speaker - Oral
MACHINE LEARNING BASED SURROGATE MODEL TO PREDICT ENGINEERING DEMAND PARAMETERS
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Matias Rojas

Speaker - Oral
Machine Learning and Statistics-Driven Code-Oriented Shear Strength Equation for RC Structural Walls

Niloofar NE. Elyasi, PhD Student

Speaker Online Only
Rapid Seismic Vulnerability Assessment of Low-Rise RC Buildings Using Machine Learning

June 30, 2022 1:30 PM - 3:00 PM

T.S.44 Structural Engineering Practice Lightning Session

Where: Salt Palace: 250 ABC

Session Type: Technical Topic Session

This session includes a series of short, lightning presentations on a vast array of concepts in Structural Engineering Practice. Attend this session to learn about a diversity of topics presented in a quick, lively format.

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Masume Dana, M.Eng.

Moderator
 
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Brandt Saxey

Speaker - Lightning
The Effects of Neglecting Gravity Loads in the Design of Buckling Restrained Braces
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Paul W. Richards, PhD, PE

Speaker - Lightning
Using Genetic Algorithms to Optimize Steel Special Moment Frames
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Claudia Zapata-Kraft

Speaker - Lightning
Estimating Periods of Wood Structural Panel Diaphragms
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Jeffrey Salmon, PhD

Speaker - Lightning
Effects of Snow and Ice on the Breakaway Resistance of Base-Isolated Buildings in Regions of Moderate Seismicity
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Larry Bowlus

Speaker - Lightning
Experimental Evaluation of the Straddling Pendulum Base-isolated System
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Pawan Kumar

Speaker - Lightning
Comparison of Tight and Mean Spectral Matching for Non-Linear Response History Analysis at a Near-Fault Site in San Carlos, California
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Zeynep Tuna Deger, Ph.D.

Speaker - Lightning
Assessment of Seismic Code Provisions for Incorporation of the Vertical Component of Ground Motions

Tadahiro Kishida

Speaker - Lightning
MySQL & Python Interface for Structural Health Monitoring: A Case Study of Mandir, Abu Dhabi
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Qudama Albu Jasim, PhD

Speaker - Lightning Online Only
Fragility Evaluation of a Continuous Concrete Box Girder Bridge: a Case Study
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Ankul Kumar

Speaker - Lightning Online Only
Proposed Modifications for Indian Seismic Code IS 1893 (Part 1)

Tzu Kang Lin

Speaker - Lightning Online Only
Development of smart semi-active isolation system with ground motion characteristic prediction
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Takumi Andou

Speaker - Lightning Online Only
Seismic Capacity Evaluation of Light Gauge Steel and Lightweight Concrete Shear Walls

Richard Clarke, PhD

Speaker - Lightning Online Only
Seismic Retrofit Design Procedures for Resilient Ferrocement-Retrofitted URM Single-Story Houses
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Francisco J. Crisafulli

Speaker - Lightning Online Only
Computational Implementation of an Advance Masonry Panel Element in OpenSees
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Patricio Andrés Pineda Nalli, M.Sc., M.Sc.

Speaker - Lightning Online Only
Proposal for Seismic Design of Steel Tanks by Backward Seismic Analysis (BSA) Method

June 30, 2022 1:30 PM - 3:00 PM

T.S.45 Risk and Loss Assessment (Real-time)

Where: Salt Palace: 251 ABC

Session Type: Technical Topic Session

This session focuses on new developments and applications on risk and loss assessment. Particular emphasis will be on statistical data real-time loss assessment.

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Gemma J. Cremen, PhD

Moderator
 
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Henry Burton

Speaker - Oral
Causal Inference on Statistical Data: A New Paradigm in Earthquake Engineering
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Susu Xu, PhD

Speaker - Oral
Causality-Informed Bayesian Inference for Rapid Seismic Ground Failure and Building Damage Estimation
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Sabine Loos, PhD

Speaker - Oral
Damage data integration across historical earthquakes and in real time
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Jorge Mario Lozano, MSc

Speaker - Oral
The Effect of Uncertainty Evolution from USGS Shakemap in HAZUS Earthquake Damage Assessment
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David J. Wald, PhD

Speaker - Oral
Evaluating of a Decade of U.S. Geological Survey’s PAGER Real-Time Earthquake Loss Estimates

Vitor Silva, PhD

Speaker - Oral
The (not-too-distant) Future of Earthquake Risk Assessment

Reza Filizadeh

Speaker - Lightning Online Only
Probabilistic Time-Dependent Damage Evaluation of Reinforced Concrete Bridges under Multiple Hazards

Ya-Chu Tsao, MD

Speaker - Lightning Online Only
A GIS-based Building Database for Damage Potential and Loss Estimation: Using Tsunami Inundation Map in Wujie Town as an Example

June 30, 2022 1:30 PM - 3:00 PM

T.S.46 Repair and Retrofit of Structures I

Where: Salt Palace: 251 DEF

Session Type: Technical Topic Session

This is the first of two sessions featuring studies on the repair of structural components, and assessment of the performance of retrofitted structures.

Stavroula J. Pantazopoulou, PhD, P.Eng., F.ACI, F.EIC

Moderator
 
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Insub I. Choi, Ph.D

Speaker - Oral
Expected Loss Assessment of Stiffness-based Seismic Retrofit Methods for Mid-rise Residential Buildings with Soft-story
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Amir Safiey, PhD

Speaker - Oral
Repair Assessment of Reinforced Concrete Frames with a Range of Deformation Capacities

Stavroula J. Pantazopoulou, PhD, P.Eng., F.ACI, F.EIC

Speaker - Oral
Cyclic Testing of Concrete Cores Under Confinement with UHPFRC Jackets
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Mary Beth D. Hueste, PhD

Speaker - Oral
Nonlinear Modeling of Slab-Column Frames under Seismic Effects
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Vladimir Rodríguez

Speaker - Oral
Experimental Evaluation Of CFRP Wrapping For Seismic Rehabilitation Of A Heavily Damaged Concrete Beam

Jose Duran

Speaker Online Only
Enhancing Shear Transfer Across 90-degree Slab-Wall Concrete Connections Using +/- 45 Degree Bidirectional FRP Composites
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Murshalin Ahmed

Speaker Online Only
A Retrofit Scheme for RC Buildings with Exterior Beam-Column Joints with Deficient Anchorage
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H M Golam Samdani, M. Engg

Speaker Online Only
A Theoretical Evaluation Scheme of the Ultimate Flexural Strength of Multi-Storey Column With Wing Walls in RC Flat Plate Structure

June 30, 2022 3:30 PM - 5:00 PM

S.S.32 Addressing the Public Health and Healthcare Impacts of Earthquakes: New Approaches at the Intersection of Public Health and Earthquake Engineering

Where: Salt Palace: 250 DEF

Session Type: Special Session

Earthquakes can result in significant and sustained impacts on healthcare infrastructure and public health. This special session will showcase recently completed and ongoing interdisciplinary projects to improve earthquake preparedness for healthcare and demonstrate the potential for integrative research and practice focusing on health and healthcare infrastructure. Speakers from engineering and public health disciplines will describe robust qualitative and quantitative methodologies and global case studies to improve the healthcare system's preparedness and response to earthquakes to protect lives. The session will begin with an overview of the new Public Health Working Group under the Earthquake Engineering Research Institute's (EERI) Learning from Earthquakes (LFE) Program. The goals of the Public Health Working Group are to summarize known impacts of earthquakes on public health, public health infrastructure, and healthcare systems; identify gaps in knowledge about the public health and healthcare impacts of earthquakes; develop and implement a research agenda to meet identified knowledge gaps; and bolster learning opportunities and multidisciplinary collaboration offered through the LFE program. The session will continue with five presentations and conclude with a discussion of new opportunities to advance the science and practice of healthcare preparedness through interdisciplinary collaboration.

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Luis Ceferino

Speaker - Oral
Addressing the Public Health and Healthcare Impacts of Earthquakes: New Approaches at the Intersection of Public Health and Earthquake Engineering

Nicole A. Errett

Session Organizer
Addressing the Public Health and Healthcare Impacts of Earthquakes: New Approaches at the Intersection of Public Health and Earthquake Engineering
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Courtney E. Welton-Mitchell

Session Organizer
Addressing the Public Health and Healthcare Impacts of Earthquakes: New Approaches at the Intersection of Public Health and Earthquake Engineering
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Carlos Molina Hutt, PhD, PE

Speaker - Oral
Seismic Risk Modeling of Hospital Infrastructure in Southwest British Columbia, Canada
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Janise Rodgers, PhD

Speaker - Oral
Developing Customized Tools to Assess Hospital Vulnerability to Natural Hazards in Nepal and Myanmar

June 30, 2022 3:30 PM - 5:00 PM

S.S.33 Advancing School Earthquake Safety in Our Communities

Where: Salt Palace: Ballroom A

Session Type: Special Session

School earthquake safety encompasses not only life safety issues for children and teachers, but also community resilience, recovery, and economic impacts. The EERI School Earthquake Safety Initiative (SESI) is a global and collaborative network of diverse, expert, and passionate professionals who are committed to creating and sharing knowledge and tools that enable progressive, informed decision making around school earthquake safety. In this special session, a panel of SESI members will discuss the pressing questions and needs of school earthquake safety, spanning a breadth of perspectives: schools in low-to-moderate seismicity regions; domestic and international collaborations; lessons learned from recent earthquake events; building code impacts; and multihazard resilience for schools, which often function as a center of a community/neighborhood.

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Christine Z. Beyzaei

Speaker - Oral
Advancing School Earthquake Safety in Our Communities - Special Session
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Rob Jackson, M.S.C.E., P.E., F.ASCE, F.SEI

Speaker - Oral
Seismic School Safety in Low to Moderate Seismic Regions; a Colorado perspective
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Katherine J. Johnson, PhD

Speaker - Oral
 

Sissy Nikolaou, PhD, PE

Speaker - Oral
 

June 30, 2022 3:30 PM - 5:00 PM

S.S.34 Coordinated Study of Fault Hazard, Seismic Hazard, Site Response, and Liquefaction in the Southern San Francisco Bay Area

Where: Salt Palace: Ballroom C

Session Type: Special Session

The San Francisco Bay Area has been well studied for its geotechnical and geological complexity. As the infrastructure has grown around the major urban centers of Oakland and San Francisco, the engineering geological and geotechnical engineering phenomena unique to this geology have become better understood through case histories and lessons learned. The development of the South Bay area has not forced significant development of engineering geology and geotechnical engineering in the alluvial fan of the Santa Clara Valley. In a series of eight papers, this team has produced a body of work that furthers the understanding of geotechnical earthquake engineering for in the southern San Francisco Bay Area. The session begins with an investigation of an inferred 'potentially active' fault characterized as it crosses just to the east of downtown San José (paper 1). An advanced study of this fault leads to the recharacterization of fault slip rates and the development of a site-specific seismic hazard analysis and seismic zonation study for eastern, central, and western San José and Santa Clara (papers 2 and 3). Site- specific site response analyses provided the ability to compare amplification factors from the NGA-W2 and the response in each zone (papers 4 and 5). Using the soil model developed for the site response analysis, site-specific liquefaction studies, advanced soil-structure interaction models can be completed for proposed underground infrastructure (papers 6 and 7). That infrastructure will cross the fault, so the constitutive modeling was also applied to the fault rupture scenario at the fault crossing (paper 8).

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Martin Walker, PE, GE, LEED AP, ENV SP

Session Organizer
Session Introduction
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John Baldwin, CEG

Speaker - Oral
Fault Rupture Hazard Investigation of the Silver Creek fault, San José, California, USA
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Andrew Dinsick

Speaker - Oral
Seismic Hazard Assessment in the San José Area, California, USA
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Andrew Dinsick

Speaker - Oral
Development of design ground motions in the San José area, California, USA
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Alvin P. Bayudanto

Speaker - Oral
Site Response Analysis in the San José Area, California, USA
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Jongwon Lee, Ph.D., P.E.

Speaker - Oral
Comparison of Amplification Factors from NGA-W2 GMMs and Site Response Analysis in the San José Area, California, USA
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Kevin Stanton, PhD, PE

Speaker - Oral
3D seismic soil-structure-interaction analysis of a subway station headhouse, adits, and tunnel in the San José area, California, USA
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Joseph Ang

Speaker - Oral
Liquefaction susceptibility assessment in the San José area, California, USA
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Wenyong Rong, PhD

Speaker - Oral
Numerical Modelling of Tunnel Fault Crossing in the San José Area, California, USA

June 30, 2022 3:30 PM - 5:00 PM

S.S.36 Machine Learning Applications in Earthquake Engineering: Hope, Hype or Hindrance (A Debate)

Where: Salt Palace: 151 G

Session Type: Special Session

We are presenting a friendly debate where two panelists will argue 'for' the use of machine learning (ML) in earthquake engineering (EE) and two will argue 'against'. One of the 'against' speakers will highlight challenges with using ML models to solve EE problems. The second 'against' speaker will argue 'in defense of physics', focusing on why we shouldn't lose sight of physics-based models. The first speaker on the 'for' team will discuss the advantages of ML models relative to more traditional ones. The second 'for' speaker will focus on the complimentary aspects of ML and physics-based techniques. The envisioned 90-minute session will open with the moderator providing a brief (3 minutes) overview of the session. Each of the four debaters will have 12-15 minutes (uninterrupted) to make their respective arguments, followed by 5 minutes of questions from the moderator. The next 15 to 20 minutes will be used to allow audience members to ask questions of the debaters or provide their own (brief) input on the topic. The session will end with a 3 to 5 minutes synopsis by the moderator who will highlight the salient points raised in the debate.

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Henry Burton

Session Organizer
Machine Learning Applications in Earthquake Engineering: Hope, Hype or Hindrance (A Debate)
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Henry Burton

Speaker - Oral
Machine Learning Applications in Earthquake Engineering: Hope, Hype or Hindrance (A Debate)
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Ezra Jampole, PhD

Speaker - Oral
Defense of Physics-Based Models in Earthquake Engineering
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Xiao Liang

Speaker - Oral
Artificial Intelligence Assisted Automated Post-Earthquake Structural Health Monitoring

Stephanie G. Paal, PhD

Speaker - Oral
Towards Physics-informed Approaches: Simultaneously Learning from Physics-based and Data-driven Models
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Michael Mieler, PhD

Moderator
 

June 30, 2022 3:30 PM - 5:00 PM

S.S.38 Blind Prediction Contests and the Essential Insights They Provide: Part 2

Where: Salt Palace: Ballroom B

Session Type: Special Session

Large damaging earthquakes are rare and unpredictable, and thus so too are the opportunities for earthquake engineers to test their assumptions and learn how well they are doing. A great way to add to our chances for learning opportunities is with blind prediction contests. Such contests provide practitioners, researchers, and students an opportunity to see what the 'true answer' is compared to predictions of building code equations, research recommendations, or analytical modeling. Typically, the contests have been structural engineering predictions of the failure of a test specimen. There have also been contests related to geotechnical engineering and lifelines. Predicted quantities can include strength, stiffness, behavior mode, mechanism, and deformation or ductility capacity. Every day earthquake engineers evaluate and design structures and infrastructure lifelines. They do this based on standards derived from principles and research, including layers of assumptions. It is unlikely that in their lifetime their work will be tested at demands close to maximum or design earthquake levels. However, with blind prediction contests, engineers and researchers have a way, at least within the prescribed scope of a test specimen, to see how well their best prediction matches the true answer of a test result.

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Masahiro Kurata

Speaker - Oral
2020 Blind Prediction Competition for Integrated Complex Structural and Nonstructural Assessment on Steel Hospital Building
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Bozidar Stojadinovic, PhD

Speaker - Oral
2019 Blind Response Prediction Contest of a Four-Column Rocking Podium Structure: Predicting the Unpredictable
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Ramin Motamed, PhD, PE

Speaker - Oral
2018 PEER Blind Prediction Contest on Numerical Simulation of a Large-Scale Liquefaction Shaking Table Test: Lessons Learned and Practical Insights
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Amarnath Kasalanati

Speaker - Oral
PEER’s Program of Blind Prediction Contests
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Joe Maffei

Session Organizer
 
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Vesna Terzic

Session Organizer
 

June 30, 2022 3:30 PM - 5:00 PM

T.S.47 Seismic Design of High-Rise Buildings

Where: Salt Palace: Ballroom E-J

Session Type: Technical Topic Session

This session focuses on the seismic design of high-rise buildings. Attend this session to learn about current topics affecting high-rise buildings and to hear presentations on high-rise building case studies.

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Reid Zimmerman, P.E., S.E.

Moderator
 
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Tamika Bassman

Speaker - Oral
Ground Motion Selection Using Code-Compliant Conditional Mean Spectra: Effects of Conditioning Period and Amplitude Constraints
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Connie I. Chen

Speaker - Oral
A Study of the Effects of Vertical Input Ground Motions on the Design of Tall Core Wall Buildings
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Kevin P. Aswegan

Speaker - Oral
Nonlinear Analysis of Tall Shear Wall Buildings for Performance-Based Seismic Design using Phenomenological Modeling
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James O. Malley

Speaker - Oral
Seismic Performance of Tall Steel Framed Buildings Built Between 1960 - 1994
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Nader Panahshahi, PhD

Speaker Online Only
Evaluation of seismic response of transfer story concrete buildings with different types of column discontinuity
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Chinmoy Kolay, PhD

Speaker Online Only
Optimum Parameters for Seismically Excited Tall Buildings with a Single Viscously Damped Outrigger

June 30, 2022 3:30 PM - 5:00 PM

T.S.48 Policy Tools & Assessments

Where: Salt Palace: Ballroom D

Session Type: Technical Topic Session

This session focuses on novel methodologies and other advancement in earthquake resilience assessment with a view towards evidence-based policymaking.

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Lucy Arendt

Moderator
 
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Shannon R. Abeling

Speaker - Oral
Investigation into societal risk tolerance for the seismic performance of new buildings in New Zealand
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Juan F. Fung, PhD

Speaker - Oral
Promoting Earthquake Risk Reduction for Wood-Frame Soft-Story Buildings: A Case Study of San Francisco’s Seismic Retrofit Program
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Micah Hilt

Speaker - Oral
A Methodology to Leverage Seismic Risk Assessments to Inform Seismic Policy Development, the Case of the City of Vancouver
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Sara K. McBride, PhD

Speaker - Oral
2018 M7.1 Anchorage and 2021 M7.2 Nippes, Haiti earthquake case studies for Virtual Earthquake Reconnaissance Team (VERT) activation protocols, policies, and procedures to gather CCTV and earthquake response videos
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Cristina Cordova Arias, MSc

Speaker - Oral
Estimation of Direct and Indirect Economic Losses from Earthquake Damage using PBEE Methodology and BIM Tools

June 30, 2022 3:30 PM - 5:00 PM

T.S.49 Seismic Investigations of Transportation Systems and Buidlings

Where: Salt Palace: 150 G

Session Type: Technical Topic Session

 

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Brad P. Wham, PhD

Moderator
 
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Guido Andreotti, Ph.D.

Speaker - Oral
Damage Model for Underground Tunnels to Evaluate Vulnerability and Seismic Risk
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Gitanjali Bhattacharjee, PhD

Speaker - Oral
More efficient bridge seismic retrofit prioritization using surrogate model-based sensitivity analysis
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Pablo Heresi, PhD

Speaker - Oral
Analytical Fragility Curves of Typical Chilean Highway Bridges for Regional Seismic Risk Assessment
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Durgesh C. Rai, Professor

Speaker - Oral
Seismic Fragility Analysis of Flat-Slab Viaducts
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Rodrigo Silva-Lopez

Speaker - Oral
Comparative Study of Retrofitting Strategies for Seismic Risk Management of Road Networks
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Negar Mohammadgholibeyki

Speaker - Oral
Introducing a Network-based Method for Estimating Post-earthquake Buildings’ Service Restoration

June 30, 2022 3:30 PM - 5:00 PM

T.S.50 Advances in Performance Assessment of Reinforced Concrete Walls

Where: Salt Palace: 250 ABC

Session Type: Technical Topic Session

Studies featured in this session will focus on assessing the seismic performance of reinforced concrete walls, and predicting their damage mechanisms under extreme loads.

Abbie B. Liel, Professor

Moderator
 

John w. Wallace

Speaker - Oral
New Nonlinear Modeling Parameters and Acceptance Criteria for Shear-Controlled RC Structural Walls
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Saman A. Abdullah, PhD

Speaker - Oral
Nonlinear Modeling Parameters and Acceptance Criteria for Shear-Friction-Controlled RC Structural Walls
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Xianjue Deng

Speaker - Oral
Advanced Seismic Evaluation of RC Structural Walls Using Nonlinear Truss Models
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Maria J. Echeverria, Ph.D. Candidate

Speaker - Oral
Seismic Performance Assessment of a RC Wall Building with and without Retrofit Strategies
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Marios Panagiotou

Speaker - Oral
Computational Fully Nonlinear Seismic Performance Investigation of a Modern 14-story Core Wall Building in Los Angeles
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Taku Obara, Ph.D.

Speaker - Oral
Damage Prediction Tool for Rocking Concrete Walls

June 30, 2022 3:30 PM - 5:00 PM

T.S.51 Insurance Applications and Catastrophe Models

Where: Salt Palace: 251 ABC

Session Type: Technical Topic Session

This session will speak to those improvements with a focus on insurance and reinsurance applications, catastrophe models and financial loss assessments, particularly on estimating risk of portfolio of assets.

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Evan Reis, SE

Moderator
 
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Sinan SA. Akkar, PhD

Speaker - Oral
Structural Damage Sensitive Content Vulnerability Modeling for Turk Reinsurance Earthquake Loss Modeling Platform
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Christopher Deneff, M.S.

Speaker - Oral
Using the FM Global Worldwide Earthquake Map to Focus Earthquake Engineering and Underwriting
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Sorrel Hanson

Speaker - Oral
Using the FM Global Worldwide Earthquake Map to Focus Earthquake Engineering and Underwriting
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Roberto Gentile, PhD

Speaker - Oral
Reduce or transfer? A framework for combined optimal seismic retrofit and insurance
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Yajie Lee, MS

Speaker - Oral
Identifying Drivers to Catastrophe Seismic Risks of Real Estate Portfolios Using Tail Contribution Index (TCIa)
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Nicole A. Paul

Speaker - Oral
Updates to GEM’s Global Seismic Risk Model
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Yajie Lee, MS

Speaker - Lightning
CODA-Collapse – A Screening Method for Building Stability in Earthquakes
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Yolanda Lin, PhD

Speaker - Lightning
Earthquake scenario selection for portfolio holders in CEUS: a case study with Oklahoma DOT
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Mark Novakovic, PhD

Speaker - Lightning
Assessment of Earthquake and Tsunami Risk for Tofino, British Columbia
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Sinan SA. Akkar, PhD

Speaker - Lightning
Estimating Aggregate Earthquake Losses to Insurance Portfolios Using Convolution Approach

June 30, 2022 3:30 PM - 5:00 PM

T.S.52 Repair and Retrofit of Structures II

Where: Salt Palace: 251 DEF

Session Type: Technical Topic Session

This is the second of two sessions featuring studies on the repair of structural components, and assessment of the performance of retrofitted structures.

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Jazalyn Dukes, PhD

Moderator
 
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Matias Hube, PhD

Speaker - Oral
Experimental Campaign of Rehabilitated Reinforced Concrete Walls
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Anthos I. Ioannou, PhD Candidate

Speaker - Oral
Experimental Testing of ECC Jackets for Repair of Pre-Damaged R.C. Members under Cyclic Loading
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Asif Iqbal

Speaker - Oral
Soft Story Building Retrofit with Mass Timber Core and Ductile Links
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James M. LaFave, PhD

Speaker - Oral
Seismic Performance of a Structural Concrete Pile-Wharf Connection Before and After Retrofit
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Sumedh Sharma

Speaker - Oral
Seismic Retrofit Of RC Shear Walls Using Selective Weakening and Self-Centering
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Jazalyn Dukes, PhD

Speaker - Oral
Challenges in Determining Nonlinear Modeling Parameters of FRP-Retrofitted Shear Walls

June 30, 2022 5:00 PM - 6:30 PM

P.S.04 Closing Awards Ceremony and Reception

Where: Salt Palace: Ballroom E-J

Session Type: Plenary

EERI & SDC Awards Ceremony and Farewell Address from Conference Organizers.

Abbie B. Liel, Professor

Speaker - Oral
Panelist

Anne Lemnitzer, Ph.D.

Speaker - Oral
Panelist
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Divya Chandrasekhar, PhD

Speaker - Oral
Panelist
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Erica Fischer, PhD

Speaker - Oral
Panelist
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Michael G. Mahoney

Speaker - Oral
Panelist
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Brent Maxfield

Speaker - Oral
Panelist
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David Ka. Cocke

Moderator
 
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Mary Comerio

Speaker - Oral
2022 George W. Housner Medal
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Barry H. Welliver, BS

Speaker - Oral
2022 Alfred E. Alquist Special Recognition Medal
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C.B. Crouse

Speaker - Oral
2022 Bruce Bolt Medal
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Robin McGuire

Speaker - Oral
2022 Honorary Membership
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Jack P. Moehle

Speaker - Oral
2022 Honorary Membership
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Kenneth Elwood, Professor

Speaker - Oral
2022 Distinguished Lecture Award
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David J. Wald, PhD

Speaker - Oral
2022 William B. Joyner Lecture
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Samuel Yniesta

Speaker - Oral
2021 Shah Family Innovation Prize
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Ashly Cabas, PhD

Speaker - Oral
2021 Shah Family Innovation Prize
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Jack English

Speaker - Oral
2022 Younger Member Award
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Maha Kenawy

Speaker - Oral
2022 Younger Member Award

Vitor Silva, PhD

Speaker - Oral
2020 Outstanding Paper Award for Earthquake Spectra
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Adrian Rodriguez-Marek

Speaker - Oral
2021 Outstanding Paper Award for Earthquake Spectra
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Patrick C. Bassal

Speaker - Oral
2021-2022 EERI/FEMA NEHRP Graduate Fellowship
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Alan Poulos

Speaker - Oral
2021-2022 EERI/FEMA NEHRP Graduate Fellowship
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Rodrigo Costa

Speaker - Oral
2021 EERI Annual Graduate Student Paper Competition

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The objective of EERI is to reduce earthquake risk by advancing the science and practice of earthquake engineering; improving understanding of the impact of earthquakes on the physical, social, economic, political, and cultural environment; and advocating comprehensive and realistic measures for reducing the harmful effects of earthquakes.

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E-mail: ncee@eeri.org
Website: www.eeri.org

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