PEER Reports

PEER Reports

Probabilistic Seismic Hazard Analysis and Selecting and Scaling of Ground-Motion Records (PEER-CEA Project), Peer Report 2020-14

Silvia Mazzoni
Nicholas Gregor
Linda Al Atik
Yousef Bozorgnia
David P. Welch
Gregory G. Deierlein
2020

This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER) and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER–CEA Project.”

The overall objective of the PEER–CEA Project is to provide scientifically based information (e.g., testing, analysis,...

Development of Index Buildings, (PEER-CEA Project), PEER Report 2020-13

Evan Reis
2020

This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER–CEA Project.”

The overall objective of the PEER–CEA Project is to provide scientifically based information (e.g., testing, analysis, and...

Project Technical Summary (PEER-CEA Project), Peer Report 2020-12

Evan Reis
Yousef Bozorgnia
Henry Burton
Kelly Cobeen
Gregory G. Deierlein
Tara Hutchinson
Grace S. Kang
Bret Lizundia
Silvia Mazzoni
Sharyl Rabonivici
Brandon Schiller
David P. Welch
Farzin Zareian
2020

This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER) and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER-CEA Project.”

The overall objective of the PEER–CEA project is to provide scientifically based information (e.g., testing, analysis,...

Hyperbolic Hydro-mechanical Model for Seismic Compression Prediction of Unsaturated Soils in the Funicular Regime, PEER Report 2022-05

Dellena Kinikles
John S. McCartney
2022

A semi-empirical elasto-plastic constitutive model with a hyperbolic stress-strain curve was developed with the goal of predicting the seismic compression of unsaturated sands in the funicular regime of the soil-water retention curve (SWRC) during undrained cyclic shearing. Using a flow rule derived from energy considerations, the evolution in plastic volumetric strain (seismic compression) was predicted from the plastic shear strains of the hysteretic hyperbolic stress-strain curve. The plastic volumetric strains are used to predict the changes in degree of saturation from phase...

Low Seismic Damage Columns for Accelerated Bridge Construction, PEER Report 2020-10

Arpit Nema
Jose Restrepo
2020

This report describes the design, construction, and shaking table response and computation simulation of a Low Seismic-Damage Bridge Bent built using Accelerated Bridge Construction methods. The proposed bent combines precast post-tensioned columns with precast foundation and bent cap to simplify off- and on-site construction burdens and minimize earthquake-induced damage and associated repair costs. Each column consists of reinforced concrete cast inside a cylindrical steel shell, which acts as the formwork, and the confining and shear reinforcement. The column steel shell is engineered...

Blind Prediction of Shaking Table Tests of a New Bridge Bent Design, PEER Report 2020-09

Selim Gunay
Fan Hu
Khalid M. Mosalam
Arpit Nema
Jose Restrepo
Adam Zsarnoczay
Jack Baker
2020

Considering the importance of the transportation network and bridge structures, the associated seismic design philosophy is shifting from the basic collapse prevention objective to maintaining functionality on the community scale in the aftermath of moderate to strong earthquakes (i.e., resiliency). In addition to performance, the associated construction philosophy is also being modernized, with the utilization of accelerated bridge construction (ABC) techniques to reduce impacts of construction work on traffic, society, economy, and on-site safety during construction.

Recent years...

PEER Activities 2018—2020, PEER Report 2020-08

Khalid Mosalam
Amarnath Kasalanati
2020

The Pacific Earthquake Engineering Research Center (PEER) is a multi-institutional research and education center with headquarters at the University of California, Berkeley. PEER’s mission is to (1) develop, validate, and disseminate performance-based engineering (PBE) technologies for buildings and infrastructure networks subjected to earthquakes and other natural hazards, with the goal of achieving community resilience; and (2) equip the earthquake engineering and other extreme-event communities with new tools. This report presents the activities of the Center over the period of July 1,...

Comparison of NGA-Sub Ground-Motion Models, PEER Report 2020-07

Nicholas Gregor
Kofi Addo
Linda Al Atik
Gail M. Atkinson
David M. Boore
Yousef Bozorgnia
Kenneth W. Campbell
Brian S.-J. Chiou
Zeynep Gülerce
Behzad Hassani
Tadahiro Kishida
Nico Kuehn
Saburoh Midorikawa
Silvia Mazzoni
Grace A. Parker
Hongjun Si
Jonathan P. Stewart
Robert R. Youngs
2020

Ground-motion models (GMMs) for subduction earthquakes recently developed as part of the NGA-Subduction (NGA-Sub) project are compared in this report. The three models presented in this comparison report are documented in their respective PEER reports. Two of the models are developed for a global version and as well regionalized models. The third model is developed based on earthquakes contain in the NGA-Sub dataset only from Japan and as such is applicable for Japan. As part of the comparisons presented in this report, deterministic calculations are provided for the global and regional...

Development of NGA-Sub Ground-Motion Model of 5%-Damped Pseudo-Spectral Acceleration Based on Database for Subduction Earthquakes in Japan, PEER Report 2020-06

Hongjun Si
Saburoh Midorikawa
Tadahiro Kishida
2020

Presented within is an empirical ground-motion model (GMM) for subduction-zone earthquakesin Japan. The model is based on the extensive and comprehensive subduction database of Japanese earthquakes by the Pacific Engineering Research Center (PEER). It considers RotD50 horizontal components of peak ground acceleration (PGA), peak ground velocity (PGV), and 5%-damped elastic pseudo-absolute acceleration response spectral ordinates (PSA) at the selected periods ranging from 0.01 to 10 sec. The model includes terms and predictor variables considering tectonic setting (i.e., interplate and...

Conditional Ground-Motion Model for Peak Ground Velocity for Active Crustal Regions, PEER Report 2020-05

Norman A. Abrahamson
Sarabjot Bhasin
2020

Conditional models for the horizontal and vertical peak ground velocity (PGV), given the pseudospectral acceleration [PSA(T)] values, are developed for active crustal regions. The period of the PSA(T) used in the conditional model, TPGV , is magnitude dependent, which captures the effect of the magnitude dependence of the earthquake source corner frequency on the PGV. Conditional models can be used to estimate the PGV given a design spectrum and are applicable for magnitudes between 3.0 and 8.5, and for distances up to 200 km. The...