DESCRIPTION: REGISTRATION REQUIRED: This half-day workshop, made available through the FEMA-funded National Earthquake Technical Assistance Program (NETAP), will provide training on FEMA P-58. Published in 2012, FEMA P-58 presented a methodology and an implementation tool for seismic performance assessment of buildings. The follow-on project, ATC-58-2, conducted by the Applied Technology Council with funding from the Federal Emergency Management Agency (FEMA), has developed guidance on performance of code-conforming buildings and seismic design of new buildings, as well as improvements to existing tools, incorporating environmental considerations related to seismic performance of buildings. These documents and tools will be published in Spring 2018, and this 3-hour seminar will provide an overview of the newly available tools and guidance. For more information, visit: https://11ncee.org/program/workshops Hosted by: Hosted by: Applied Technology Council (ATC) and Federal Emergency Management Agency (FEMA)

DESCRIPTION: REGISTRATION REQUIRED: For more information please visit: https://11ncee.org/program/tours

DESCRIPTION: REGISTRATION REQUIRED: The one-day workshop will serve to introduce the NHERI Rapid Experimental Facility (Rapid) as a resource for the natural hazards community. Topics covered will include: how to use the RAPID, preparing a proposal for use of the RAPID, basics of natural hazards reconnaissance, overview of the RAPID Facility tools, RAPID Facility equipment, and best practices for data collection techniques, logistics and planning, data workflows, health and safety, legal ethics and IRB guidance. For more information, visit: https://11ncee.org/program/workshops. Hosted by: DesignSafe-CI

DESCRIPTION: REGISTRATION REQUIRED: This workshop will cover the basics of ground motion simulations, a summary of validation of simulations against recorded data, example applications and a panel discussion. For more information, visit https://11ncee.org/program/workshops

DESCRIPTION: REGISTRATION REQUIRED: For more information please visit: https://11ncee.org/program/tours Sponsored by Wood Environmental & Infrastructure Solutions

DESCRIPTION: REGISTRATION REQUIRED: Learn best practices for interactions with news media, from 1-on-1 recorded interviews to live shots and press conferences, with a particular focus on science, risk, and crisis communications do's and don'ts. The majority of the workshop will be focused on simulating media interviews with several break-out groups of 5-6 attendees led by various coaches with experience in public information for science, engineering, and emergency management issues. Hosted by: Southern California Earthquake Center (SCEC)

DESCRIPTION: In this opening plenary session, California Assemblymember Adrin Nazarian and Dr. Lucy Jones will showcase recent advancements and achievements in seismic mitigation policy in Southern California. They will be followed by a discussion panel with local officials designed to better understand what it takes to create successful mitigation policies and challenges to implement them successfully. They will be followed by Ashraf Habibullah who will discuss the invaluable role earthquake scientists, engineers and risk reduction experts play as change makers to ensure enhanced seismic safety for the good of society, and the critical need for the entire earthquake engineering community to work collaboratively to reach this goal. EERI President David Friedman, and 11NCEE Organizing Committee Chairs James Malley and David Cocke will also welcome attendees. To read more about the speakers in this session, visit: https://11ncee.org/program/invited-speakers

DESCRIPTION: This 5-in-5 session will feature 12-14, five minute talks on topics in infrastructure.

DESCRIPTION: This session will provide a forum for students, researchers, and practitioners to discuss new technologies for bridge columns. Seismic behavior of bridge columns constructed using high performance material and innovative structural systems will be presented. High performance materials such as ultra-high performance concrete (UHPC), and shape memory alloys (SMA) are of interest for this session. Research on structural systems such as hollow core, segmental, concrete filled tubes columns will be presented during this session as well.

DESCRIPTION: Over the last 5 years, Applied Technology Council (ATC) has been conducting projects clarifying the use, as well as evaluating the accuracy, of guidance provided in ASCE 41, Standard for Seismic Evaluation and Rehabilitation of Buildings. This session will have specific focus on ASCE 41’s current (and impending 2017) version and provide helpful guidance to attendees. The FEMA-funded ATC-124 project is developing an Example Application Guide that provides step-by-step illustrated examples for procedures outlined in ASCE 41-13 for common aspects of structural engineering projects, including selection of analysis procedures and acceptance criteria, overturning, and evaluation of real buildings of different structure types. ATC also nearing completion of the ATC-114 Phase 2 and 3 projects, funded by the National Institute of Standards and Technology (NIST), that are developing guidance for use of nonlinear structural analysis for design of buildings, specifically reinforced concrete moment frame and steel moment frame structures. Most recently, ATC initiated a new NIST-funded project that is calibrating the nonlinear analysis guidance provided in ASCE 41 by comparing the results to damage documented in buildings due to earthquake or laboratory test shaking. It is expected that the findings of this calibration study will inform the guidance provided in future versions of ASCE 41.

DESCRIPTION: Earthquake resilience continues to grow as an area of research, practice, and public policy. Progress is slowed, however, by inconsistent terminology, metrics, and criteria. A 2016 NIST Special Publication, Community Resilience Planning Guide for Buildings and Infrastructure, can help. The CRPG provides a pragmatic, jargon-free framework for describing and measuring community resilience. In brief, community resilience is measured by the post-event recovery time of key city-wide services or functions – housing, schools, jobs, commerce, government services, etc. The CRPG recognizes resilience as an attribute of human organizations, like whole communities, not as an attribute of tangible buildings and infrastructure. To the degree that a community’s resilience is related to the performance of its physical parts, it is related more to post-earthquake reoccupancy and recovery than to immediate safety. With this understanding, a community’s current resilience can be charted as expected recovery times. Goals can be shown on the same timelines, and the gaps can drive research and policy. Most important, the CRPG presents resilience with clarity even as it adapts to communities that vary in size, age, and vulnerability. The result is a clearer, more effective link between research, practice, and community-specific policy. This session will include presentations of recent research and applications tied together by their use of CRPG principles and definitions. The presented work need not have been sponsored by NIST or motivated by the CRPG. On the contrary, the session invites abstracts on diverse topics; the CRPG will merely be used as a common set of terms for presentation and communication. With this common basis, the session will allow participants from different fields to offer insights, compare notes, and take lessons without getting lost in terminology. Presenters and attendees will build on the common CRPG foundation and on each other’s work.

DESCRIPTION: SPONSORED BY: WSP. Members of reconnaissance teams that studied the impacts of the September 19, 2017 earthquake will present their observations.

DESCRIPTION: The EERI oral history program, begun in 1984, has published biographical histories on twentynine individuals as of the fall of 2017. The books are based on interviews conducted with the subjects, supplemented by additional content based on background research. The criteria for inclusion in the series are that the subjects (1) have made an outstanding career-long contribution to earthquake engineering, (2) have valuable first-person accounts to offer concerning the history of earthquake engineering, and (3) have backgrounds, considering the series as a whole, that appropriately span the various disciplines that contribute to the field of earthquake engineering The field via vignettes of the subjects in the series. The disciplines are broadly grouped into three categories: structural engineering, geosciences and geotechnical engineering, and planning

DESCRIPTION: This session focuses on modeling of critical infrastructure such as hospitals and schools. It includes both structural performance and functionality modeling with the objectives of creating a resilient infrastructure.

DESCRIPTION: Design, numerical and experimental investigation of damping devices

DESCRIPTION: This session will feature research on the topic of seismic hazard assessment.

DESCRIPTION: This session features research on non-structural components and systems.

DESCRIPTION: This session will feature research on ground motion modeling, directivity, and spatial correlation.

DESCRIPTION: Research involving evaluation of Seismic Provisions and existing buildings standards

DESCRIPTION: Lunch will be served at noon, followed by the Distinguished Lecture given by Rice University professor, Dr. Reginald DesRoches, 2018 EERI Distinguished Lecturer. The topic of the lecture is as follows: Damage from recent earthquakes underscores the importance of developing new approaches and technologies to improve the performance of structures during earthquakes. The presentation will highlight applications of one class of smart materials - shape memory alloys - in improving the performance of structures subjected to earthquake loading. Shape memory alloys belong to a class of smart materials that can undergo large deformations while reverting back to their original, undeformed shape. This unique property has led to the development of numerous applications in the biomedical, aerospace, and commercial industries. A multi-scale and multi-disciplinary approach is taken to explore the potential use of these materials for applications in earthquake engineering. Component testing, full-scale testing, and detailed analyses show great potential for shape memory alloys to significantly improve the earthquake performance of nonductile buildings and bridges. For more information on this speaker, please visit: https://11ncee.org/program/invited-speakers

DESCRIPTION: This session will feature research from the following topics: - Multi-Hazard Assessment, Cascading Hazards Following Earthquakes (fire, lanslide, etc.) - Resilient Communities and Cities - Risk and Loss Assessment and their Socio-Economic Impacts

Development and Assessment of Innovative Modular Damped H-Frame System [Poster Location 018] (ID 127)
Hamidreza Etebarian, University of British Columbia, Vancouver, Canada; T. Y. Yang, International Joint Research Laboratory of Earthquake Engineering, Tongji University, China;
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DESCRIPTION: The Applied Technology Council (ATC) is nearing completion of a project funded by the National Institute of Standards and Technology (NIST) that is developing recommended hysteretic relationships for use in nonlinear seismic analysis in support of performance-based seismic design and evaluation projects. Nonlinear static and dynamic analysis are commonly used by engineers to assess the probable performance of existing buildings and to design major new buildings. The currently available guidance documented in ASCE 41, Standard for Seismic Evaluation and Rehabilitation of Buildings, includes recommended backbone shapes and control points that describe the envelope of hysteretic response of various structural elements when subjected to ramped, fully-reversed, cyclic loading protocols. However, substantial additional research has been conducted since the development of the information presented in ASCE 41, enabling the development of updated backbones and control points for steel braced frame and moment frame, reinforced concrete shear wall and moment frame, and masonry and wood shear wall structures. The ATC-114 project conducted a study of available laboratory data and analytical studies benchmarked on these data to develop a recommended general protocol that includes global acceptance criteria and element action-level acceptance criteria, that are used with the data compiled to develop element-specific acceptance values. This session will start with an overview and introduction of the project and then delve into details about the individual structural systems studied.

DESCRIPTION: SPONSORED BY IMAGECAT. Geographically distributed groups of buildings (portfolios) present special challenges for seismic risk assessment -- for engineers, for owners and lenders, for insurers and for public agencies. Current catastrophe software is oriented toward earthquake insurance (RMS, CoreLogic, AIR Worldwide) or toward public agencies (HAZUS) for individual scenarios (e.g., ShakeOut). This session will examine portfolios seismic risk issues from a wide range of perspectives, with invited papers and a panel at the end to engage with the audience. Current work by ASTM subcommittee WK55885 on Seismic Risk Assessment of Real Estate Portfolios will be summarized, and input from the broader community sought.

DESCRIPTION: This critical infrastructure session is essentially subdivided into two major themes: Theme 1 focuses on numerical methods for hospitals and other critical infrastructure and theme 2 focuses on soil/embankment stability in earthquakes.

DESCRIPTION: This session focuses on innovative devices and methods to improve the seismic performance of bridges

DESCRIPTION: Design, numerical and experimental investigation of damping devices.

DESCRIPTION: This session will feature research on the topics of ground motion modeling and seismic hazard.

DESCRIPTION: This session provides lessons learned from reconnaissance efforts around the globe. The emphasis of this session will be on structural aspects of earthquake damage observations.

DESCRIPTION: This session features research on non-structural components and systems.

DESCRIPTION: This session will feature research on ground motion modeling, directivity, and spatial correlation.

DESCRIPTION: This session encourages a further understanding of RC walls' behavior in light of experimental and analytical studies.

Verification of a Fluid-Structure-Interaction Model for Seismic Analysis of Gen IV Nuclear Power Plants [Poster Location 137] (ID 288)
Andrew Whittaker, University at Buffalo, The State University of New York; Ching-Ching Yu, University at Buffalo, The State University of New York; Justin Coleman, Idaho National Laboratory; Michael Cohen, TerraPower, LLC;
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Comparison of the Seismic Performance of Multi-Story and Multi-Tiered Braced Frames [Poster Location 027] (ID 660)
Aradhana Agarwal, University of Illinois at Urbana-Champaign; Larry Fahnestock, University of Illinois at Urbana-Champaign;
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DESCRIPTION: Sponsored by: Moffatt & Nichol, Earth Mechanics, Inc. ASCE, BergerABAM, Port of Los Angeles, Port of Long Beach, Sage Engineers. The Port Special Session provides perspectives from port authorities, consultants, and a researcher on seismic analysis and design topics that impact the planning, protection, design, and retrofits of development and redevelopment projects of piers and wharves at west coast ports. The session provides an overview of: ASCE/COPRI piers and wharves design standard; ASCE/COPRI guidelines for seismic design of bulkheads; wharf upgrades projects at the Port of Los Angeles and Port of Long Beach; a seismic retrofit of Pier 6 at Puget Sound Naval Shipyard; and vulnerability and damage analysis maps that can be used by decision makers to assess and potentially mitigate impacts of hazards at ports and harbors.

DESCRIPTION: Established as a Council of the National Institute of Building Sciences in 1979, the Building Seismic Safety Council (BSSC) deals with the complex technical, regulatory, social and economic issues involved in developing and promulgating building earthquake risk mitigation provisions that are national in scope. The NEHRP Recommended Seismic Provisions for New Buildings and Other Structures is a consensus-approved document that involves numerous efforts from experts in earthquake research, seismic hazard mapping, seismic engineering design, and construction materials. The NEHRP Provisions is the resource document that scrutinizes the broadest extent of the seismic design process and provides state-of-knowledge information to improve the current seismic design procedures in the national seismic design standards and model building codes. BSSC developed and Federal Emergency Management Agency (FEMA) published the first NEHRP Provisions in 1985, and released later editions in 1988, 1991, 1994, 1997, 2000, 2003, 2009, and, 2015. The work for 2020 NEHRP Provisions, under the sponsorship of FEMA, started in 2015. Through its Project 17 Committee (P17C), the 2020 cycle includes a joint effort of FEMA/BSSC and USGS to update the basis for development of next-generation seismic design value maps, looking at many fundamental issues such as acceptable risk, stabilizing map values, and redefining seismic design category, which in turn will greatly affect the associated seismic design requirements. Through its Provision Update Committee (PUC), the 2020 Provisions investigate a breath of topics related to seismic performance objectives, seismic force resisting systems, modal response spectrum, shear wall design, nonstructural components, nonbuilding structures, soil-structure interaction, and rigid-wall flexible diaphragms. This special session will present the latest update on developing national seismic design value maps and present a preview on important code change proposals that may have wide ranging implications regarding future seismic design requirements for buildings.

DESCRIPTION: Myrick v. Mastagni established that the owner of a building can be liable for losses related to its earthquake performance. In particular, considering the full life of a building, the court held that an owner’s liability does not begin simply when the owner falls out of compliance with applicable codes and regulations. That was enough to resolve the Myrick case, but it left two crucial questions unanswered: 1. When does the owner’s liability begin? As soon as construction is done? When the design becomes obsolete as codes change? When buildings just like it perform poorly in earthquakes far away? When it’s put on a list as potentially hazardous? 2. When does the owner’s liability end? When it gets evaluated as “safe” by a standard lower than the code for new construction? When it’s retrofitted to comply with a program with limited goals? This session will invite legal experts to answer these two questions in a debate-like format. The questions are especially important as seismic evaluation and retrofit programs proliferate around California. Los Angeles, for example, has mandated retrofit of about 13,000 “soft story” buildings but requires only minimal work that some engineers would even call inadequate to its purpose. Los Angeles has also mandated evaluation of about 1500 older concrete buildings, but retrofit is not required for another two decades. What is the owner’s liability in the mean time?

DESCRIPTION: Nonstructural components typically represent 70 to 85% of the initial investment in buildings. Furthermore, their damage is typically triggered at levels of structural response much smaller than those required to initiate structural damage. Therefore, economic losses are typically dominated by losses associated with the damage to nonstructural components. Moreover, even in cases where there is minimal or no structural damage, the damage to nonstructural components often leads to the partial or total use of buildings. With the advent of Performance-Based Earthquake Engineering the importance of nonstructural elements is now not only widely recognized but the interest in the seismic performance is growing not only in the academic community but also in the design and manufacturer communities. This session is organized by the SPONSE Association which is an international, nonprofit, technical society of engineers, architects, manufacturers, insurers, builders, planners, public officials, and social scientists, interested in the Seismic Performance Of Non-Structural Elements.

DESCRIPTION: This session highlights the advanced analysis methods for moving toward performance-based bridge engineering

DESCRIPTION: Design, numerical and experimental investigation of seismic isolation systems

DESCRIPTION: Research which discusses seismicity, earthquake sources, earthquake geology, tectonics, faults, or large earthquakes.

DESCRIPTION: This session features knowledge gained from earthquake reconnaissance efforts via statistical analyses, technological advancements, novel imaging processes and ID algorithms to enable fast recovery of earthquake data and damage.

DESCRIPTION: This session will feature research on ground motion modeling, directivity, and spatial correlation.

DESCRIPTION: Laboratory findings of steel members are discussed in-depth behavioral findings for columns, collectors, angle braces, and welded joint connections

Hybrid Bridge Bent for Accelerated Bridge Construction Using Post-Tensioned Columns & BRB [Poster Location 001] (ID 1040)
Anurag Upadhyay, University of Utah; Chris Pantelides, University of Utah;
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Effect of Flexural Demands in the Leaner Columns on the Column Buckling Strength [Poster Location 014] (ID 1014)
Patricia Clayton, The University of Texas at Austin; Yigit Ozcelik, Ozyegin University;
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Seismic Design of Data Centers for Tier III and Tier IV Resilience: Basis of Design [Poster Location 061] (ID 1263)
Baris Erkus, Istanbul Technical University; Huseyin Darama, Arup; Seref Samil Polat, Emlak Konut Gyo;
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Broadband Ground Motion Simulation Within the City of Duzce and Building Response Simulation [Poster Location 065] (ID 1426)
Ekin Özlü, Middle East Technical University; Ayşegül Askan, Middle East Technical University; Shaghayegh Karimzadeh, Middle East Technical University;
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Real-Time Structural Health Monitoring System Using Internet of Things and Cloud Computing [Poster Location 071] (ID 1129)
Tzu-Kang Lin, National Chiao Tung University; Hung-Fu Chang, Link Dynamic;
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Multihazard Risk Assessment (Seismic and Wind) for Buildings with Dampers in Mexico City [Poster Location 075] (ID 1010)
Marco Santos Santiago, Institute of Engineering-UNAM; Federico Valenzuela-Beltrán, Institute of Engineering-UNAM; Sonia E. Ruiz, Institute of Engineering-UNAM;
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Rocking Motion: Chaotic or Not Chaotic, Does It Matter for Seismic Design? [Poster Location 081] (ID 1490)
Michalis Vassiliou, ETH Zürich; Bozidar Stojadinovic, ETH Zürich; Jonas Bachmann, ETH Zürich; Marco Broccardo, ETH Zürich; Mathias Strand, NTNU Trondheim;
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Damage Assessment of Built-Up Areas Via UAS Point Clouds [Poster Location 087] (ID 1416)
M. Ebrahim Mohammadi, University of Nebraska-Lincoln; Richard Wood, University of Nebraska-Lincoln;
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Classification of Structures Regarding Seismic Capacity and Comparison of Retrofittings [Poster Location 094] (ID 1041)
Kenjiro Yamamoto, The University of Tokyo; Kimiro Meguro, The University of Tokyo;
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Resilience Challenges in South and Southeast Asian Hill Cities [Poster Location 102] (ID 1045)
Dinesh Joshi, GeoHazards International; Hari Kumar, GeoHazards International; Janise Rodgers, GeoHazards International; Julie Jomo, GeoHazards International; Karma Tshering, GeoHazards International; L. Thomas Tobin, GeoHazards International; Lalrinpuii Tlau, GeoHazards International; Lokendra Bhatta, GeoHazards International; Maggie Ortiz-Millan, EERI; Sonam Tenzin, GeoHazards International; Upama Ojha, GeoHazards International;
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Annualized Earthquake Loss Estimations for High-Code Buildings in Istanbul [Poster Location 106] (ID 1571)
Eser Cakti, Bogazici University; Karin Sesetyan, Bogazici University; Ufuk Hancilar, Bogazici University;
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Quantification of Downtime in a Highway Network During Moderate Seismic Events [Poster Location 116] (ID 1067)
Farzin Zareian, University of California, Irvine; Preetish Kakoty, University of California, Irvine;
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Taiwan Earthquake Model (TEM): From Understanding of Seismic Hazard to Risk Assessment [Poster Location 119] (ID 1184)
Kuo-Fong Ma, National Central University; Taiwan Earthquake Model team, ;
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Application of Continuous Cladding as a Passive Energy Dissipation Device [Poster Location 130] (ID 1166)
Xiao Fan Wang, The University of Tokyo; Hideomi Gokon, The University of Tokyo; Kimiro Meguro, The University of Tokyo;
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Parametric Study on Dynamic Behavior of RC Integral Bridge Incorporating Simplified SSI [Poster Location 153] (ID 1188)
Sreya Dhar, IIT Guwahati; Kaustubh Dasgupta, IIT Guwahati;
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Fault Dimensions and Maximum Magnitude [Poster Location 156] (ID 519)
David Jackson, UCLA; Deborah Weiser, One Concern; Natanya Porto, RMS;
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DESCRIPTION: Traditionally, global GMPEs have been developed for three broad tectonic categories: active crustal regions, stable continental regions, and subduction zones. As empirical data sets have grown in the last decade, it has become clear that there are significant differences in the distance scaling and site scaling within these broad tectonic categories. The NGA-W2 GMPEs incorporated systematic regional differences in the in VS30 scaling, basin depth scaling, and large distance scaling for large regions (California, Japan, Taiwan, Italy, Turkey, ... ). The key differences between the 2008 NGA GMPEs and the 2014 NGA-W2 GMPEs are due to these regional differences. The effects of regionalizing the GMPEs were clearly seen in the site factors: the 2014 NGA-W2 GMPEs for California showed much stronger scaling with VS30 than the 2008 NGA GMPEs based on the global average. This change reflects the different geologies in these regions that have different correlations between the shallow shear-wave velocity (VS30) and the deep VS profile that controls site amplification. The NGA-W2 GMPEs considered the differences for broad regions, but there are systematic differences in the ground-motion scaling over a much small scale. Within California, the regional differences can be observed over distances of 15 to 30 km for the distance scaling and over even shorter distances for the site scaling, indicating that there can be significant changes in the hazard over short distances. The current efforts to include site-specific basin effects into the national hazard maps is one of the first steps in this move to site-specific GMPEs to capture regional differences over short distance within a broad tectonic region. As new GMPEs regionalized over shorter distance scales are applied, there can be significant changes in the estimated hazard at specific sites: some sites will have increased hazard and some sites will have reduced hazard. Example hazard calculations using non-ergodic GMPEs that include finely regionalized distance and site scaling effects will be shown. These examples show that there can be up to a factor of 2 increase or decrease in the ground motion for return periods of 1,000 to 10,000 years. Initially, hazard analyses based on non-ergodic GMPEs will be limited to site-specific studies, but non-ergodic terms, such as site-specific basin factors, are currently being considered for the national hazard maps. Regionalized path effects are the next step in this move to non-ergodic hazard. Dr. Abrahamson is an internationally known expert in seismic hazard and risk analyses with 30 years experience in the practical application of engineering seismology to the development of deterministic and probabilistic seismic criteria for engineering design and evaluations of seismic risk. He has been involved in developing or reviewing design ground motions for hundreds of projects around the world including dams, bridges, nuclear power plants, nuclear waste repositories, water and gas pipelines, rail lines, ports, landfills, hospitals, electric substations, and office buildings. The focus of his research has been the interface between the earth sciences and earthquake engineering. His work on ground-motion models includes the statistical methods for empirical ground-motion models such as the random-effects regression methodology and incorporation of hanging-wall effects, directivity effects, fling effects, and basin effects into empirical ground-motion models using constraints from numerical simulations. His work on seismic hazard has focused on the epistemic uncertainty in the hazard and how to reduce the uncertainty using constraints from fragile geologic features and using recordings of ground motions at the site of interest. Currently, he is working on partially and fully non-ergodic ground-motion models that transition from using global ground-motion models to using site-specific and source-specific ground-motion models. To read more about the speakers in this session, visit: https://11ncee.org/program/invited-speakers

Risk-targeted vs. uniform-hazard vs. deterministic ground motions for U.S. design codes (ID Theme01)
Nicolas Luco, USGS;
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Overview of Some Operational Earthquake Forecasting (OEF) Capabilities and Products (ID 904)
Edward Field, USGS, Golden; Kevin Milner, University of Southern California;
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DESCRIPTION: Thomas H. Jordan will also be presenting, "Cybershake Models of Seismic Hazards in Southern and Central California" (ID 1458) later in the day (1:30 - 3:00 PM).

DESCRIPTION: This 5-in-5 session will feature 12-14, five minute talks on topics in Structures and Site Response.

DESCRIPTION: Recent advances taking place in the areas of performance-based assessment, ground motion prediction, and information technology—such as data harvesting and analytics, as well as cloud computing—are enabling seismic risk assessment of interconnected infrastructure components and facilities as a whole. The nexus of these advances brings new opportunities to quantify the seismic resiliency of coupled infrastructure systems and to devise policy and urban planning decisions at multiple spatial and temporal scales. In this 11NCEE Special Session, we aim to bring together academic researchers and industry practitioners with policy makers and planners to identify key research needs as well as critical pathways that will enable the implementation of research outcomes into real-life applications. Several invited talks will be followed by panel discussion and audience participation. The planned topics include:(1) Performance-based approaches to seismic assessment of various key structure types, facilities, and lifelines (from hazard characterization to response prediction);(2) Overview of computational tools and facilities presently available for undertaking regional assessment efforts, and a discussion of future needs;(3) Planning and resilient design of new/future infrastructure elements;(4) Current and planned efforts for assessment and improvement of seismic resilience of urban regions and lifelines.

DESCRIPTION: There is a growing interest among the bridge community in adopting performance-based earthquake engineering (PBEE). Accurate modeling and rigorous nonlinear time history analysis (NLTHA) are central to fragility curves development, and in turn, indispensable for PBEE. Most of the current bridge codes such as AASHTO or Caltrans Seismic Design Criteria use classical force-based design or adopt displacement-based seismic design. NLTHA is usually limited to special cases for analysis of important bridges. However, with the recent advances in software and analysis methods, NLTHA is expected to extend to wider classes and more common bridge types to complement and/or replace current code methods, and ultimately contribute to a full PBEE framework. This is also reflected by the numerous recent or ongoing research studies that focus on providing robust modeling and analysis guidelines to capture nonlinear behavior of different bridge components and overall system behavior. This proposed session will have presentations of research focusing on advances in modeling and analysis towards performance-based design of bridges and bridge components. Some examples of the topics suitable for this session are: (1) modeling of damping and implications of damping assumptions including the damping model type (e.g. Rayleigh damping or modal damping), damping ratio, number of modes, and stiffness type; (2) soil-structure interaction at bridge abutments and pile foundations; (3) efficient computational methods (e.g. proper integration methods) for optimizing analysis time and achieving convergence for NLTHA; (4) ground motion selection and different methods for selecting or developing suite of earthquake records for NLTHA.

DESCRIPTION: SPONSORED BY IMAGECAT. Earthquake reconnaissance has evolved from collecting key observational data augmented with film photographs to a highly digital process. Mass data collection in-field not only provides an opportunity for subject-matter experts to make key observations on building and lifeline failures, but reconnaissance teams are recently discovering that it allows for detailed digital reconstruction of a wide variety of systems as well. Examples include ground-based lidar to capture landslides, UAV video providing 3D reconstruction of building damage, satellite imagery to track reconstruction and provide regional context, crowd-sourcing social and economic impacts before deployment, and hand-held devices allowing for the collection of field data on buildings, lifelines, and human subjects. These reconnaissance technologies are increasingly informing resilience modeling efforts beyond the structural environment- allowing researchers to understand why and how communities recover. This session will present several examples of new methods to monitor resilience.

DESCRIPTION: The seismic response of buildings is sensitive to damping. The level of damping in the structure affects not only the peak amplitude but also the duration of response. As recommended in ASCE 7, a damping ratio of 5% is typically used for all buildings when doing seismic loading. When doing response history analyses, a Rayleigh damping is typically used. The best way to learn about the damping in buildings is by recording the response of buildings when they are subjected to dynamic loads and then inferring the damping by using the recorded response. While there has been a relatively large number of studies on damping in buildings subjected to wind loading, the number of studies on damping of buildings subjected to seismic loading is significantly smaller. Typically, only a reduced number of buildings has been studied and their results have been added to databases that mix results from different types of dynamic load, and results inferred using different techniques. The purpose of this special session is to present and discuss results from recent investigations on damping ratios inferred from instrumented buildings subjected to earthquake ground motions. Several recent studies have been conducted on system identification of damping on hundreds of buildings in California many of which have been subjected to various earthquakes offering a unique opportunity to study the variation of damping ratios with variables such as height, primary structural material, lateral resisting system, etc. Another important aspect is the level of damping associated with higher modes. Until recently there were very few studies on the damping ratios of higher modes which offer the opportunity to evaluate the validity of Rayleigh damping which is perhaps the most common method to model damping in structures. The session will also discuss the role of soil-structure interaction on the damping in buildings.

DESCRIPTION: Column base connections are arguably the most important connections transferring forces from the entire structure into the foundation. Since the publication of the American Institute of Steel Construction’s Steel Design Guide One on Base Plates (in 2006), significant research has accumulated on the topic of column base connections (especially in the context of their seismic response and design). This research, when integrated, has the potential to entirely transform the design and simulation practice for column base connections themselves, as well as the systems that they are a part of. However, the translation of this research into professional practice requires serious coordination on the part of researchers and industry leaders that are invested in these connections. The purpose of this special session is to generate this coordination, focused around the following themes: (1) reviewing recent findings on column bases – including bending and shear transfer mechanisms, strength and stiffness models, best-practices for simulation, and impact on building performance, (2) examining opportunities to transfer these research and technologies to practice, given the economic tradeoffs of structural performance, construction, design and manufacturing, and (3) strategies to facilitate these technology transfers, e.g., development of design documents, codes, or examples. The participants will include a mix of academics, structural designers, fabricators, and manufacturers representing the entire cross-section of stakeholders in the context of these connections. This will (possibly for the first time) provide a common venue for discussion dedicated solely to these important connections. It is expected that significant, actionable outcomes will arise from this session.

DESCRIPTION: Design, numerical and experimental investigation of damping devices

DESCRIPTION: Seismic Retrofit of Steel Structures - Recent Research and Applications

DESCRIPTION: Identification of properties and modeling of soil behavior under seismic excitation for soils and layered sites.

DESCRIPTION: SPONSORED BY HASELTON BAKER RISK GROUP LLC. Models for quantifying earthquake risk from a financial and socio-economic standpoint continue to improve. This session will speak to those improvements with a focus on insurance applications and financial loss assessment, with some emphasis on reducing uncertainty, identifying better predictor variables, and connecting financial impacts to mitigative behavior.

DESCRIPTION: Ground Motion Simulations for Engineering Applications: Ground motion simulation methods, sensitivity to source and seismic velocity model, and use in seismic hazard.

DESCRIPTION: SPONSORED BY CGS. This session will feature research which discusses tsunami hazard assessment, design, and recovery.

DESCRIPTION: Lunch will be served at noon, followed by the Joyner Lecture, given by University of Texas at Austin professor, Dr. Ellen M. Rathje (M.EERI,1996), the 2018 recipient of the William B. Joyner Lecture Award. The topic of her talk will be as follows: Earthquake-induced landslides represent a significant seismic hazard, as evidenced by recent earthquakes in Kaikoura, New Zealand and Gorkha, Nepal, and proper planning/mitigation requires accurate evaluation of the potential for seismic landslides. Engineers often tackle this problem through a detailed evaluation of individual slopes and more recently have introduced performance-based engineering (PBE) concepts into the analysis. Recognizing the compounding effects of multiple landslides across an area, earth scientists often evaluate seismic landslides at a regional scale. This approach sacrifices details, but provides a broader assessment of the impacts of earthquake induced landslides. This presentation will describe the integration of performance-based engineering concepts into regional-scale seismic landslide assessments. The basic PBE framework for seismic landslides will be introduced along with the modifications required to apply it at a regional scale. The application of the approach for a seismic landslide hazard map will be presented. The use of seismic landslide inventories to validate regional landslide assessments will be discussed, along with advancements in developing seismic landslide inventories using remote sensing techniques. Finally, research needs required to further advance regional seismic landslide assessments will be presented. For more information on this speaker, please visit: https://11ncee.org/program/invited-speakers

Use of Airborne SAR Imagery to Extract Earthquake Damage in Urban Areas [Poster Location 114] (ID 110)
Fumio Yamazaki, Chiba University; Shoichiro Kojima, National Institute of Information and Communications Technology; Wen Liu, Chiba University;
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DESCRIPTION: This session will feature research from the following topic areas:(1)Buildings, Structural Systems; (2)Lessons Learned from Recent Earthquakes; (3) Post-Earthquake Assessment and Response

DESCRIPTION: Recent advances taking place in the areas of performance-based assessment, ground motion prediction, and information technology such as data harvesting and analytics, as well as cloud computing are enabling seismic risk assessment of interconnected infrastructure components and facilities as a whole. The nexus of these advances brings new opportunities to quantify the seismic resiliency of coupled infrastructure systems and to devise policy and urban planning decisions at multiple spatial and temporal scales. In this 11NCEE Special Session, we aim to bring together academic researchers and industry practitioners with policy makers and planners to identify key research needs as well as critical pathways that will enable the implementation of research outcomes into real-life applications. Several invited talks will be followed by panel discussion and audience participation. The planned topics include:(1) Performance-based approaches to seismic assessment of various key structure types, facilities, and lifelines (from hazard characterization to response prediction);(2)Overview of computational tools and facilities presently available for undertaking regional assessment efforts, and a discussion of future needs;(3) Planning and resilient design of new/future infrastructure elements;(4) Current and planned efforts for assessment and improvement of seismic resilience of urban regions and lifelines

DESCRIPTION: The LFE Travel Study Program is an initiative of the Earthquake Engineering Research Institute (EERI) to conduct field study trips to earthquake affected regions around the world. The first program was held in Chile in January 2017. Using tools and approaches developed by EERI to study resilience in previous earthquakes, participants studied resilience of housing, schools, healthcare facilities, and businesses in Chile. This session presents the observations on recovery and resilience in Chile as well as lessons from this approach to learning from earthquakes.

DESCRIPTION: This session showcases recent developments of bridge designs and practice

DESCRIPTION: Design, numerical and experimental investigation of energy dissipation and control systems.

DESCRIPTION: Retrofit of Concrete Structures - Recent Research and Applications

DESCRIPTION: Response analysis, modeling, and design of structures and foundations for seismic soil-strucutre interaction effects.

DESCRIPTION: SPONSORED BY HASELTON BAKER RISK GROUP LLC. Methods for evaluating structural vulnerability and expected performance have continued to improve over time. This session presents a variety of studies aimed at improving various aspects of the existing methods, from considerations for ground motion to fragility functions.