Thrust Area 3—Lifelines Component and Systems Hazards
Jack Moehle (UCB) & Yousef Bozorgnia (UCB)
Co-Thrust Leaders

Project Descriptions

Calibration of Basin Simulations—1A03
Thomas Henyey (USC/SCEC), Steven Day (SDSU/F), Douglas Dreger (UCB/F), Shawn Larsen (LLNL/O), Kim Olsen (UCSB/O), Arben Pitarka (URS Corp/I), Robert Graves (URS Corp/I), Jacobo Bielak (CMU/F), Antonio Fernandez (CMU/GS)

The project will foster the integration of 3D ground motion simulation methods and results into engineering applications.
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Next Generation Attenuation (NGA) Models, WUS Shallow Crustal Earthquake —1L01
Maurice Power (Geomatrix/I), Robert Youngs (Geomatrix/I), I.M. Idriss (UCD/F), Kenneth Cambell (ABS Consulting/I), Yousef Bozorgnia (ATS/I)

The overall goal of project 1L Series is to develop Next-Generation Ground Motion Attenuation (NGA) Models for shallow crustal earthquakes in the western United States.
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NGA Data Sets—1L02
Walter Silva (PE&A/I)

Configure the PEER Strong Motion Data Set for use in developing empirical attenuation relations.
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NGA: Site Condition Metadata from Geology—1L05
C. Wills (CDC-CGS/O), K. Clahan (CDC-CGS/O)

Provide geology-based estimates of shear-wave velocity at all strong-motion recording sites in the PEER-NGA database.
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Ground Motion Models for Fling Step—1L06
Robert Graves (URS Corp/I), Norman Abrahamson (PG&E/I), Nancy Collins (URS Corp/I)

The objective of this project is to develop a parametric description of the fling step behavior expected for dip-slip faulting using numerical simulations of scenario earthquakes.

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Statistical Methods for Attenuation Modeling—1L07a
Robert Youngs (Geomatrix/F)

This project is in support of PEER Lifelines project “Next Generation Attenuation Models (NGA)”. NGA is a comprehensive, multidisciplinary project to formulate the next generation of attenuation relations.
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1-D Rock Motion Simulations—1L08
Walter Silva (PE&A/I)

Provide finite fault simulations of strong ground motions to guide in developing empirical attenuation relations.
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Checking and Augmentation of NGA Database—1L09
Nancy Collins (URS Corporation/I), Paul Somerville (URS/I), Robert Graves (URS/I), Carla Willis (URS/I))

Review of the NGA database including earthquake source parameters, station distance and directivity parameters, orientation of recorded components, and station locations and other items as may be deemed pertinent.
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Supplemental USGS Work for NGA Project—1L10
Paul Spudich (USGS/O), Jack Boatright (USGS/O), Rufus Catchings (USGS/O), Walter Mooney (USGS/O), Christopher Stephens (USGS/O), Shane Detweiler (USGS/O), Clare Steedman (USGS/O), Mark Goldman (USGS/O), Luke Blair (USGS/O), Linda Seekins (USGS/O), Fabio Perosi (USGS/O)

  1. Development of improved functional forms for directivity, based on isochrones theory that can be used by NGA attenuation relation developers in their new attenuation models.
  2. Depths and uncertainties to 1.0 and 2.5 km/s S-wave velocities for all stations within the Bay Area and northern California that contribute strong motion recordings to the PEER/NGA database.
  3. Processed accelerograms for 56 USGS 3-component records.
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Supplemental SASW Work by USGS for NGA Project—1L10b
Robert Kayen (USGS/F), Eric Thompson (UNC/O), Diane Minasian (USGS/O), Brad Carkin (USGS/O)

Spectral analysis of surface waves (SASW) testing at strong motion recording (SMR) sites for the Next Generation Attenuation modeling (NGA) project.
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Workshop on Uncertainties in Nonlinear Soil Properties and Impact on Modeling Response—2B03
Michael Riemer (UCB/F), Ellen Rathje (U.Texas/F), Donald Anderson

This project supplements funding for an NSF Workshop focusing on identifying the key sources of uncertainty surrounding the non-linear dynamic properties of soils, and evaluating the role of this uncertainty in the context of other factors in performing Site Response Analysis (SRA).
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Archiving & Web Dissemination of Geotechnical Data—2L02
J. Carl Stepp (COSMOS/O), Jennifer Swift (USC/F), Charles Real (CGS/I), Diane Vaughn (CGS/I), Jean Benoit (UNH/F), Daniel Ponti (USGS/I), Mindy Squibb (UCSB/I), Joe Futrelle (UI NCSA/GS), Joseph Sun (PG&E/I), John Bobbitt (POSC/I), Loren Turner (Caltrans/I), Cliff Roblee (Caltrans/I), Paul Grimes (COSMOS/O), Alexei Peters (Caltrans-Farallon Graphics/O), Shahzad Tiwana (USC/GS), Dennis Wuthrich (Caltrans-Farallon Graphics/O), Jianping Hu (USC/GS), Sam Mansukhani (FHWA/I), Thomas Lefchik (FHWA/I)

Develop a Pilot System for web-based dissemination of linked geotechnical database archives, develop and implementation plan, and plan and conduct a workshop to review and obtain input and consensus of the geotechnical community.
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Examining Site Response issues for NGA—2M01
Z. L. Wang (Geomatrix/I), C.C. Chin (Geomatrix/I), Maury Power (Geomatrix/I)

This project will support the NGA project (lifeline) in resolving the modeling issues that will be used to develop the site amplification functions needed by NGA attenuation relationship developers in their regression analyses of empirical ground motion data.
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CPT Testing of Deposits in Imperial Valley—3D04
Jonathan Stewart (UCLA/F)

This project consisted of retesting of liquefaction and non-liquefaction field case histories in the Imperial Valley with the cone penetration test (CPT).
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Foundation Loads due to Spreading Ground—3F02
Ahmed Elgamal (UCSD/F), Liangcai He (UCSD/GS)

To participate in conducting large-scale shake-table experiments in NIED Japan on lateral-spreading liquefaction effects on piles and pile-groups.
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Inertial & Kinematic Load Combinations on Pile Foundations in Liquefying & Laterally Spreading Ground—3F03
Ross Boulanger (UCD/F), D. Chang (UCD/GS)

The objective of this project is to establish guidelines for inertial and kinematic load combinations to be used in simplified pushover analyses of pile foundations in liquefied and laterally spreading ground.
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Improved Assessment of Liquefaction-Induced Lateral Spreading Hazard—3G02
Raymond Seed (UCB/F), Allison Faris (UCB/GS)

The goal of this research effort is to use the field case history database developed in previous year’s efforts regarding liquefaction-induced lateral spreading, as well as new relationships developed by PEER-supported laboratory testing programs to better define post-liquefaction strain and displacement behaviors, to develop improved engineering methods for estimation/prediction of lateral spreading deformations.
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Analytical Models for Electrical Equipment Connected by Rigid Buses—401b
Armen Der Kiureghian (UCB/F)

This project extends previous work on analytical modeling of the interaction effect between electrical substation equipment connected by rigid buses.
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Seismic Qualification Requirements for Transformer Bushings—406
Ahmed Elgamal (UCSD/F), Howard Matt (UCSD/GS)

The purpose of this research project is to improve the qualification requirements for transformer bushings.
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Evaluation and Application of Concrete Tilt-up Assessment Methodologies—509
James Malley (Degenkolb/I), Tim Graf (Degenkolb/I), Jack Hseuh (Degenkolb/I)

Task 1
The goal of Task 1 is to provide input to existing codes (e.g. International Building Code) and guidelines (e.g. FEMA 356) that will improve the seismic assessment methodologies of concrete tilt-up and other low-rise, rigid-wall, flexible diaphragm buildings.
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Working Group for Validation of Probabilistic Seismic Hazard Computer Programs—607
Ivan Wong (URS/I), Patricia Thomas (URS/I)

Probabilistic seismic hazard analysis (PSHA) is a commonly used approach for assessing earthquake ground shaking hazard.
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