Civil Engineering Association

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Pacific Earthquake Engineering

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PEER 2008/103 - Experimental and Computational Evaluation of Current and Innovative In-Span Hinge Details in Reinforced Concrete Box-Girder Bridges
Matias A. Hube, Khalid M. Mosalam - Report (6.5 MB)
PEER 2008/102 - Modeling of Unreinforced Masonry Infill Walls Considering In-Plane and Out-of-Plane Interaction
Stephen Kadysiewski, Khalid M. Mosalam - Report (2.6 MB)
PEER 2008/101 - Seismic Performance Objectives for Tall Buildings
William T. Holmes, Charles Kircher, William Petak, Nabih Youssef - Report (5.3 MB)
PEER 2008/08 - Toward Earthquake-Resistant Design of Concentrically Braced Steel-Frame Structures
Patxi Uriz, Stephen A. Mahin - Report (17.36 MB)
PEER 2008/07 - Using OpenSees for Performance-Based Evaluation of Bridges on Liquefiable Soils
Steven L. Kramer, Pedro Arduino, HyungSuk Shin - Report (22.7 MB)

and more (1998-2008)...

The Earthquake Engineering - Strong Motion Group is a research group of the University of Southern California, Civil Engineering Department. Its research focuses on: (i) earthquake strong ground motion for engineering applications, and (ii) earthquake response of man made structures, aiming to improvement of the seismic design procedures and earthquake risks reduction. Its research is interdisciplinary, and covers a wide range of topics, such as: earthquake source mechanism, seismic wave propagation, site and propagation path effects on strong ground motion, prediction of strong ground motion for design (peak amplitudes, duration, and spectral characteristics…), probabilistic seismic hazard assessment, strong motion recording and data processing, soil-structure interaction, structural identification and health monitoring using ambient noise and forced vibrations, effects of various realistic representations of strong ground motion on structures. The group operates the Los Angeles and Vicinity Strong Motion Network, installed in 1979/80, which has contributed valuable data for numerous engineering and seismological studies The group also maintains and develops equipment and processing methods for ambient vibration testing of full-scale structures. The group was formed in 1976 when Prof. M.D. Trifunac joined the Civil Engineering faculty.

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Selected Publications:

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Earthquake Hazards Program

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Latest Earthquakes

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IRIS (Incorporated Research Institutions for Seismology)

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Founded in 1984 with support from the National Science Foundation, IRIS is a consortium of over 100 US universities dedicated to the operation of science facilities for the acquisition, management, and distribution of seismological data. IRIS programs contribute to scholarly research, education, earthquake hazard mitigation, and the verification of a Comprehensive Test Ban Treaty.

IRIS is a 501 © (3) nonprofit organization incorporated in the state of Delaware with its primary headquarters office located in Washington, DC.

Seismic Monitor allows you to monitor global earthquakes in near real-time, visit seismic stations around the world, and search the web for earthquake or region-related information

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TOPIC WAS "STICK".
very good topic, & useful for earthquake engineering.

thanks Elijah

NISEE University of California Berkeley

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Since 1972, NISEE has guided discovery of significant earthquake engineering information resources. NISEE is supported by the University of California, Berkeley and by personal memberships in The Earthquake Engineering Online Archive.

Civil Engineering Department Report Series
Strong Motion Group Contributions

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99 Reports from University of Southern California - USC (1.40 Gb)

M.D. Trifunac and B. Westermo (1976). Dependence of the Duration of Strong Earthquake Ground Motion on Magnitude, Epicentral Distance, Geologic Conditions at the Recording Stations and Frequency of Motion (4.4 Mb). Report No. 76-02, Dept. of Civil Engrg., Univ. of Southern California. pp. 64.

M.D. Trifunac and B. Westermo (1976). Correlations of Frequency Dependent Duration of Strong Earthquake Ground Motion with the Modified Mercalli Intensity and the Geologic Conditions at the Recording Stations (4.1 Mb). Report No. 76-03, Dept. of Civil Engrg., Univ. of Southern California. pp. 64.

F.E. Udwadia and M.D. Trifunac (1977). A Note on the Calculation of the Fourier Amplitude Transforms (1.9 Mb). Report No. 77-01, Dept. of Civil Engrg., Univ. of Southern California. pp. 30.

J.G. Anderson and M.D. Trifunac (1977). On Uniform Risk Functionals Which Describe Strong Earthquake Ground Motion: Definition, Numerical Estimation, and an Application to the Fourier Amplitude of Acceleration (7.2 Mb). Report No. 77-02, Dept. of Civil Engrg., Univ. of Southern California. pp. 100.

M.D. Trifuanc and J.G. Anderson (1977). Preliminary Empirical Models for Scaling Absolute Acceleration Spectra (9.1 Mb). Report No. 77-03, Dept. of Civil Engrg., Univ. of Southern California. pp. 141.

M.D. Trifunac (1977). Uniformly Processed Strong Earthquake Ground Accelerations in the Western United States of America for the Period from 1933 to 1971: Pseudo Relative Velocity Spectra and Processing Noise. Report No. 77-04, Dept. of Civil Engrg., Univ. of Southern California. pp. 219.

And more...

Holmes Consulting Group - Structural and Civil Engineering[/url]

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Holmes Consulting Group is a world leader in the structural refurbishment of old buildings,
seismic base isolation and the non-linear analysis of a buildings reaction to an earthquake.

Design Guides

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Base Isolation Design Guidelines (2.8 Mb)

Design of base isolation systems for bridges and buildings. Includes chapters on the principles of base isolation; implementation issues for buildings and bridges; seismic input; performance and engineering properties of different types of seismic isolation systems; design of the isolators; connection design and structural design. Examples of isolation system design for buildings, bridges and industrial equipment plus a summary of actual earthquake performance of seismic isolated structures and bibliography. Lead rubber bearings, high damping rubber bearings, sliding bearings and the Friction Pendulum System©.

Damper Design Guidelines (1.6 Mb)

Design of in-structure dampers and energy dissipators for buildings. Includes chapters on the principles of in-structure damping; theoretical damper properties; damping decay; time history results; practical device properties; design procedures and bibliography. Hysteretic, friction, viscous and visco-elastic dampers.

Performance Based Analysis Guidelines (4.6 Mb)

A Users Manual for Performance Based Design concepts for the evaluation and rehabilitation of existing buildings. Based on NZNSEE and FEMA-273 / FEMA-356 requirements. Covers both the NSP (nonlinear pushover) and NDP (nonlinear time history) methods. Chapters include concepts of performance based design; earthquake input; modeling techniques; material and element models for degrading strength and degrading stiffness frame and wall elements; model preparation, nonlinear analysis and results processing using Holmes Consulting Group software; acceptance criteria; evaluation of response; project list and bibliography.

Papers Pushover Analysis and Performance-Based Earthquake Engineering

A modal pushover analysis procedure for estimating seismic demands for buildings - Anil K. Chopra & Rakesh K. Goel

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Capacity-Demand-Diagram Methods for Estimating Seismic Deformation of Inelastic Structures SDF Systems - Anil K. Chopra & Rakesh K. Goel

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Evaluation of Modal and FEMA Pushover Analyses SAC Buildings - Anil K. Chopra & Rakesh K. Goel

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A Review of Existing Pushover Methods for 2D Reinforeced Concrete Buildings - López Menjivar

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Performance Based Design of Concrete Shear Wall Structure with Deep Foundations - Miyamoto & Singh

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Nonlinear Pushover Analysis of Reinforced Concrete Structures - Enrico Spacone

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Structural Analysis for Performance-Based Earthquake Engineering - FEMA 451, Design Examples

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Edit reason: Dead links refreshed with direct ones. (G)

Papers Pushover Analysis and Performance-Based Earthquake Engineering

Thesis Evaluation of Pushover Anaysis Procedures for Frames Structures - Sermin Oguz (168 pages)

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Evaluation of Modal Pushover Analysis Procedure Using Vertically Regular and Irregular Generic Frames - Chatpan Chintanapakdee

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Guidelines for Seismic Vulnerability Reduction in the Urban Environment - Editor Andre Plumier (333 pages)

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Edit reason: 2 live (direct) links added. (G)

National Center for Research on Earthquake Engineering (NCREE) of Taiwan[/url]

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Located on one of the most active seismic regions in the world, Taiwan suffers from frequent earthquakes caused by the Circum Pacific Seismic Belt. In fact, about twenty significantly strong earthquakes have been recorded in the history of Taiwan. To compensate for this, earthquake hazard needs to be taken into account in all civil engineering constructions to ensure sufficient resistance against the shakes. With the joint effort from the Taiwan National Science Council (NSC) and the National Taiwan University (NTU), the National Center for Research on Earthquake Engineering (NCREE) is established in 1990. Since then, this institution has worked endlessly to upgrade seismic resistant design standards for all constructions and provides feedback to the engineering community through research and development.

Some Publications

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General Description

During past earthquakes, the ground motions on soft soil sites were found to be generally larger
than those of nearby rock outcrops, depending on local soil conditions (e.g., Seed and Idriss,
1968). These amplifications of soil site responses were simulated using several computer
programs that assume simplified soil deposit conditions such as horizontal soil layers of infinite
extent. One of the first computer programs developed for this purpose was SHAKE (Schnabel et
al., 1972). More than 25 years after its release, SHAKE is still commonly used and referenced
computer programs in geotechnical earthquake engineering. SHAKE computes the response in a
horizontally layered soil-rock system subjected to transient and vertical travelling shear waves.
SHAKE is based on the wave propagation solutions of Kanai (1951), Roesset and Whitman
(1969), and Tsai and Housner (1970). SHAKE assumes that the cyclic soil behavior can be
simulated using an equivalent linear model, which is extensively described in the geotechnical
earthquake engineering literature (e.g., Idriss and Seed, 1968; Seed and Idriss, 1970; and
Kramer, 1996). SHAKE was modified many times (e.g., frequency-dependent equivalent strain;
Sugito, 1995). SHAKE91 is one of the most recent versions of SHAKE (Idriss and Sun, 1992).
In 1998, the computer program EERA was developed in FORTRAN 90 starting from the same
basic concepts as SHAKE. EERA stands for Equivalent-linear Earthquake Response Analysis.
EERA is a modern implementation of the well-known concepts of equivalent linear earthquake
site response analysis. EERA's implementation takes full advantages of the dynamic array
dimensioning and matrix operations in FORTRAN 90. EERA's input and output are fully
integrated with the spreadsheet program Excel.
Following the introduction, the second section of this report reviews the theory of equivalent linear
soil model, and one-dimensional ground response analysis. The two appendices contain a
sample problem and comparison between EERA and SKAKE91 results.

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"...FREE SHARE FOR ALL..."

General Description

Seismic/Eruption: A program for the visualization of seismicity and volcanic activity in space and time.

The program, which runs under Windows 95/98/NT/2000/XP, has an extensive database of events. A number of pre-defined maps are included which illustrate the seismicity in various parts of the earth.
Click on the image at the right to see a screen-capture of the program. The buttons do not work for you but will work when the program is run on a PC.
An earlier DOS program was used by CBS News when reporting on large earthquakes. It was used at the time of the Parkfield alert in November 1993, the Northridge (Los Angeles) event of January 17, 1994, the Kobe event of January 17, 1995, and several others. You will know it if you see the caption across the top of the screen: "CBS News Seismic Monitor."
Union Pacific Railroad uses the program in their dispatch center in Omaha to inform them when they may have to stop trains and inspect the right-of-way.
This program and the Seismic Waves program (see below) are part of the new Janet Annenberg Hooker Hall of Geology, Gems, and Minerals at the National Museum of Natural History of the Smithsonian Institution in Washington, DC which opened September 20, 1997.
Seismic/Eruption has shaded terrain images which are saved-screen images. If you want to create your own images, you can do this by fetching the 5-minute world topographic file etopo5.zip. WARNING: It is very large: about 18 megabytes when unpacked and 11.4 meagbytes as a zip file. For higher resolution images of the continental United States, you can fetch topo30.zip. It is even larger: 43 megabytes when unpacked and 15.3 megabytes as a zip file.

Download Links:

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Seismic Waves: A program for the visualization of wave propagation

Seismic Waves is a Windows program which illustrates how wave propagate from an earthquake hypocenter to seismic stations throughout the earth. One sees waves propagating out from the epicenter on a three-dimensional view of the earth at the same time one sees waves propagating through a cross-sectional view of the earth. These two wave propagation views are synchronized with actual event waveforms so that as a particular phase arrives at a station, one sees the effect on the seismiogram.

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AmaSeis: A program to obtain seismographs from the AS-1 Amateur Seismometer

The AS-1 seismometer is modeled, somewhat, after the design featured in the April 1979 Amateur Scientist column in Scientific American. That design used analog components to amplify the signal whereas the present design is digital with the output going to the RS-232 (communications port) of a personal computer.

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Eqlocate: An interactive program to locate earthquakes using P-wave arrivals

The EqLocate program allows you to select P-wave arrivals of a number of seismograms for an earthquake and find its location.

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Selected Works of Rakesh K. Goel

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Education
University of California, Berkeley, Ph.D. in Structural Engineering, November 1990
University of California, Berkeley, M.S. in Structural Engineering, May 1985
Indian Institute of Technology, New Delhi, B.Tech. in Civil Engineering, June 1982

Role of Shear Keys in Seismic Behavior of Bridges Crossing Fault-Rupture Zones (with Anil K. Chopra), Journal of Bridge Engineering (2008)
This paper examines the role of shear keys at bridge abutments in the seismic behavior...

Statistics of Single-Degree-of-Freedom Estimate of Displacement for Pushover Analysis of Buildings (with Anil K. Chopra and Chatpan Chintanapakdee), Journal of Structural Engineering (2003)
Investigated is the basic premise that the roof displacement of a multistory building can be...

Evaluation of NSP to Estimate Seismic Deformation: SDF Systems (with Anil K. Chopra), Journal of Structural Engineering (2000)
Investigated in this paper is the approximation in the ATC-40 nonlinear static procedure (NSP) that...

Closure to Period Formulas for Concrete Shear Wall Buildings (with Anil K. Chopra), Journal of Structural Engineering (1999)

Period Formulas for Concrete Shear Wall Buildings (with Anil K. Chopra), Journal of Structural Engineering (1998)
Most seismic codes

and more...

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