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Generation of Uniform-Hazard Earthquake Ground Motions

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Abstract

This paper presents statistical models for the generation of bi-axial earthquake ground motion time histories with spectra that match those from samples of ground motion records. The model parameters define near-field characteristics such as pulse velocity and pulse period, far-fault characteristics such as velocity amplitude and power spectral density, and envelope characteristics. The samples of ground motions used in this study were previously selected and scaled to be representative of particular hazard levels in particular geographical regions. A companion paper presents the fitting of the model to samples of ground motion waveforms. In this paper, the new concept of a parameter-response correlation spectrum establishes the period-dependence of the correlation between the response spectrum and ground motion parameters. Parameters that correlate to variability of the response spectra are retained as random variables and are then fit to mean and mean-plus-standard deviation of bi-axial response-spectra of the samples of historical records. Parameter statistics also include correlations between velocity amplitudes and pulse periods.

Sponsoredby

National Science Foundation

This material is based upon work supported by the the Civilian Research and Development Foundation for the Independent States of the Former Soviet Union (CRDF) under Award No. MG1-2319-CH-02 and by the National Science Foundation under Grant No. NSF-CMMI-0704959 (NEES Research), and Grant No. NSF-CMS-0402490 (NEES Operations). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

Publications

Gavin, Henri P., and Dickinson, Bryce W., "Generation of Uniform-Hazard Earthquake Ground Motions," Journal of Structural Engineering, 

Submitted 30 June 2008; accepted 24 September 2010; posted ahead of print 21 October 2010

Cite this work

Researchers should cite this work as follows:

  • Gavin, Henri P., and Dickinson, Bryce W., "Generation of Uniform-Hazard Earthquake Ground Motions," Journal of Structural Engineering, 

    Submitted 30 June 2008; accepted 24 September 2010; posted ahead of print 21 October 2010

    http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000331

  • Henri Gavin; Bryce Dickinson (2010), "Generation of Uniform-Hazard Earthquake Ground Motions," http://nees.org/resources/1502.

    BibTex | EndNote

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