PEER Reports

PEER Reports

Performance-Based Seismic Design Concepts and Implementation Proceedings of the International Workshop Bled, Slovenia, June 28 - July 1, 2004, PEER Report 2004-05

Peter Fajfar
Helmut Krawinkler
2004

The workshop on “Seismic Design Methodologies for the Next Generation of Codes,” held in Bled, Slovenia, in 1997, initiated considerable progress worldwide to establish basic concepts and methods for performance-based earthquake engineering. An increasing acceptance of PBEE concepts by practicing engineers, together with extensive research, has led to implementation in the design and upgrade of buildings, bridges, and other man-made structures.

Encouraged by the success of the 1997 workshop, we decided to organize an international forum aimed at continuing dialog on the...

Ground Motions for Earthquake Simulator Qualification of Electrical Substation Equipment, PEER Report 2004-07

Shakhzod M. Takhirov
Gregory L. Fenves
E. Fujisaki
Don Clyde
2004

The main objective of the study was to develop a set of strong motion time histories suitable for seismic qualification testing of electrical substation equipment in accordance with the IEEE 693- 1997 standard. Although the objective deals with sh ake table testing of a particular class of equipment, many of the issues investigated are equally relevant to the dynamic testing of other types of equipment and components. This study was motivated by a desire to introduce a standard set of input motions in three orthogonal directions and thus achieve more consistency in earthquake simulator...

Seismic Qualification and Fragility Testing of Line Break 550-kV Disconnect Switches, PEER Report 2004-08

Shakhzod M. Takhirov
Gregory L. Fenves
Eric Fujisaki
2004

The objective of the study was to conduct seismic qualification and fragility testing of a single pole of a 550-kV porcelain disconnect switch. Due to clearance limitations above the shake table, the switch with the main blade in the open position could not be tested in a typical field installation; therefore, several switch configurations were developed for testing. The 550-kV disconnect switch was tested in three configurations: mounted on typical 14-ft-tall supports, mounted on a short 4-in. spacer to simulate flexibility of the top plat es of the supports, and rigidly fixed to the...

Electrical Substation Equipment Interaction: Experimental Rigid Conductor Studies, PEER Report 2004-09

Christopher Stearns
André Filiatrault
2004

The main objective of the research described in this report was through quasi-static and shake table testing to experimentally investigate th e interaction between components of substation equipment connected by redesigned (or improved) rigid bus connectors. The purpose was to generate data that would provide guidance in the design of conductor assemblies with the improved connectors. Another objective was to provide experimental validation data for a current PEER-PG&E project in which analytical studies are being conducted at the University of California, Berkeley. Specific te sts...

Application of the PEER PBEE Methodology to the I-880 Viaduct, PEER Report 2006-10

Sashi K. Kunnath
2006

This report summarizes the efforts of several in vestigators involved in reviewing, assessing, and applying the PEER performance-based methodology (PBM) to an existing viaduct in California. The expected seismic performance of the 5th and 6 th Street viaduct, denoted in this report as the I-880 viaduct, is investigated
probabilistically within the context of the PEER framework. The PEER approach consists of four essential components: development of a site-specific hazard curve; estimation of seismic demands given a set of ground motions consistent with the site hazard; prediction of...

Probabilistic Seismic Demand Analysis Using Advanced Ground Motion Intensity Measures, Attenuation Relationships, and Near-Fault Effects, PEER Report 2006-11

Polsak Tothong
C. Allin Cornell
2006

In performance-based earthquake engineering (PBEE), evaluating the seismic performance (or seismic risk) of a structure at a designated site has gained major attention, especially in the past decade. One of the objectives in PBEE is to quantify the seismic reliability of a structure due to future random earthquakes at a site. For that purpose, probabilistic seismic demand analysis (PSDA) is utilized as a tool to estimate the mean annual frequency of exceeding a specified value of a structural demand parameter (e.g., interstory drift ratio).

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Societal Implications of Performance-Based Earthquake Engineering, PEER Report 2006-12

Peter J. May
2006

This report considers various aspects of the societal implications of performance-based approaches to earthquake engineering. The societal benefits can generally be characterized as the “value added” of performance information in enhancing seismic design and risk management. The realization of these benefits rests on widesp read adoption of perfor mance-based approaches in engineering practice. At present, this is somewhat limited. Several future scenarios are considered that may result from changes in code provisions or from changes in societal perspectives about seismic safety. The...

Boore-Atkinson NGA Ground Motion Relations for the Geometric Mean Horizontal Component of Peak and Spectral Ground Motion Parameters, PEER Report 2007-01

David M. Boore
Gail M. Atkinson
2007

This report contains ground motion prediction equations (GMPEs) for a particular measure of horizontal-component ground motions as a function of earthquake mechanism, distance from source to site, local average shear-wave velocity, and fault type. Our equations are for peak ground acceleration (PGA), peak ground velocity (PGV), and 5%-damped pseudo-absolute- acceleration spectra (PSA) at periods between 0.01 s and 10 s. The equations were derived by empirical regression of the PEER NGA strong-motion database. For periods of less than 1 s, the analysis used 1574 records from 58 mainshocks...

Campbell-Bozorgnia NGA Ground Motion Relations for the Geometric Mean Horizontal Component of Peak and Spectral Ground Motion Parameters, PEER Report 2007-02

Kenneth W. Campbell
Yousef Bozorgnia
2007

We present a new empirical ground motion model, commonly referred to as an attenuation relationship, which we developed as part of the PEER Next Generation Attenuation of Ground Motion (NGA) Project. Using a common database of worldwide strong motion recordings, we selected a subset of ground motion data and predictor variables that we believed were appropriate for use in developing our model. Consistent with the requirements of the PEER NGA Project, we developed both a median and aleatory uncertainty model for peak ground acceleration (PGA). peak ground velocity (PGV), peak ground...

Beam-Column Element Model Calibrated for Predicting Flexural Response Leading to Global Collapse of RC Frame Buildings, PEER Report 2007-03

Curt B. Haselton
Abbie B. Liel
Sarah Taylor Lange
Gregory G. Deierlein
2007

Performance-based earthquake engineering relies on the availability of analysis models that can be used to predict structural performance, including collapse. In this report, a lumped-plasticity element model developed by Ibarra et al. (2005) is used to model the behavior of reinforced concrete (RC) beam-columns. The backbone and its associated hysteretic rules provide for versatile modeling of cyclic behavior and, importantly, the model captures the negative stiffness of post-peak response, enabling modeling of the strain-softening behavior that is critical for simulating the collapse of...