Project Objectives:  The PEER Lifelines program is sponsoring a series of integrated research projects to calibrate and further develop existing nonlinear geotechnical models for ground response analysis. The global project objectives are:

(1)   To identify the intensity measures and shaking conditions for which the inclusion of ground response calculations of any type in hazard analyses is beneficial,

(2)  To identify conditions where nonlinear analyses provide a tangible benefit relative to equivalent linear analyses, and

(3)  To provide specific recommendations for the implementation of nonlinear models in design practice.

This web site contains data for “calibration sites” that will be used in these projects. Included for each site is the following information: (1) geotechnical data such as stratigraphy, soil types, and small-strain shear wave velocity profiles; (2) strong motion recordings from the site; (3) a reference set of carefully chosen control motions for use as input in ground response analyses; and (4) Modulus reduction and damping curves used in SHAKE analysis for each site.

¹Engineering model means our interpretation of modulus reduction and damping curves and shear wave velocities used in the analyses.

  List of modulus reduction and damping curves

²Input motions given were scaled and baseline corrected and the time step was 0.02 seconds.

³All spectra are calculated for 5% damping and geometric mean of two horizontal components unless otherwise indicated.

References:

Dickenson, S.E. (1994). “The dynamic response of soft and deep cohesive soils during the Loma Prieta earthquake of October 17, 1989,” Ph.D. Dissertation, Univ. of California, Berkeley.

EPRI, Electrical Power Research Institute (1993). "Guidelines for determining design basis ground motions. Volume 1 : Method and guidelines for estimating earthquake ground motion in eastern North America," Rpt. No. EPRI TR-102293, Palo Alto, CA.

Frankel, A., and Vidale, J. (1992). " A three-dimensional simulation of seismic waves in the Santa Clara Valley, California, from a Loma Prieta Aftershock," Bull. Seism. Soc. Am., 82 (5), 2045-2074.

Fumal, T.E. (1991). "A compilation of the geology and measured and estimated shear-wave velocity profiles at strong-motion stations that recorded the Loma Prieta, California, earthquake," OFR 91-311, U.S. Geological Survey, Menlo Park, CA.

Gibbs, J.F., and Fumal, T.E. (1994). "Seismic velocities and geologic logs at seven strong-motion stations that recorded the 1989 Loma Prieta, California, earthquake, Part IV," OFR 94-552, U.S. Geological Survey, Menlo Park, CA.

Gibbs, J.F., Fumal, T.E., Boore, D.M., and Powers, T.J. (1992). “Seismic velocities and geologic logs from borehole measurements at seven strong motion stations that recorded the 1989 Loma Prieta, California, earthquake,” OFR 92-287, U.S. Geological Survey, Menlo Park, CA.

Gibbs, J.F., Fumal, T.E., and Powers, T.J. (1993). "Seismic velocities and geologic logs from borehole measurements at eight strong motion stations that recorded the 1989 Loma Prieta, California, earthquake," OFR 93-376, U.S. Geological Survey, Menlo Park, CA.

Gibbs, J.F., Fumal, T.E., and Powers, T.J. (1994). "Seismic velocities and geologic logs from borehole measurements at eight strong motion stations that recorded the 1989 Loma Prieta, California, earthquake,” OFR 94-222, U.S. Geological Survey, Menlo Park, CA.

Gibbs, J.F., Tinsley, J.C., Boore, D.M., and Joyner, W.B. (1999). "Seismic velocities and geological conditions at twelve sites subjected to strong ground motion in the 1994 Northridge, California, earthquake: A revision of OFR 96-740" OFR 99-446, U.S. Geological Survey, Menlo Park, CA.

Gibbs, J.F., Tinsley, J.C., Boore, D.M., and Joyner, W.B. (2000). "Borehole velocity measurements and geological conditions at thirteen sites in the Los Angeles, California region," OFR 00-470, U.S. Geological Survey, Menlo Park, CA.

Gibbs, J.F., Tinsley, J.C., and Joyner, W.B. (1996). "Seismic velocities and geologic conditions at twelve sites subjected to strong ground motion in the 1994 Northridge, California, earthquake," OFR 96-740, U.S. Geological Survey, Menlo Park, CA.

Guha, S., Bray, J.D. and Drnevich, V.P. (1993). "Characteristics of the deep old bay clay deposits in the east San Francisco bay area," Rpt. No. UCB/GT/93-09, Univ. of California, Berkeley.

Iwasaki, Y., and M. Tai (1996). Strong motion records at Kobe Port Island, Soils and Foundations (special issue), 29-40

KAJIMA Corporation (2000), NFE project report, Nuclear Power Department, Construction Group, Kajima Corporation

Nigbor, R.L. and Steller, R.A. (1993). “Borehole geophysical measurements at 24 rock and soil sites,” Report to EPRI, Rep#9225-6427 Agbabian Assoc., March.

Porcella, R.L. (1984). "Geotechnical investigations at strong-motion stations in the Imperial Valley, California," OFR 84-562, U.S. Geological Survey, Menlo Park, CA.

Powers, T.J. and Fumal, T.E. (1993). “Geologic logs from 25 boreholes near strong motion accelerographs that recorded the 1989 Loma Prieta, California, earthquake,” OFR 93-502, U.S. Geological Survey, Menlo Park, CA.

ROSRINE, Resolution Of Site Response Issues from the Northridge Earthquake, http://geoinfo.usc.edu/rosrine/

Shannon & Wilson/Agbabian Associates, SW/AA (1980). "Geotechnical data from accelerograph stations investigated during the period 1975-1979, summary report," Report to U.S. Nuclear Regulatory Commission, Washington, D.C.

Stewart, J.P. and Stewart, A.F. (1997). " Analysis of soil-structure interaction effects on building response from earthquake strong motion recordings at 58 sites," Rpt. No. UCB/EERC-97/01, Earthquake Engineering Research Center, Univ. of California, Berkeley.

Thiel, C.C. and Schneider, J.F. (1993). "Investigations of thirty-three Loma Prieta earthquake strong motion recording sites," Report to Building Contractors Society of Japan and Electrical Power Research Institute, California Universities for Research in Earthquake Engineering, Standford, CA.