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Characterization of near-source ground motions with earthquake simulations

Aagaard, Brad T. and Hall, John F. and Heaton, Thomas H. (2001) Characterization of near-source ground motions with earthquake simulations. Earthquake Spectra, 17 (2). pp. 177-207. ISSN 8755-2930. https://resolver.caltech.edu/CaltechAUTHORS:AAGes01

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Abstract

We examine the characteristics of long-period near-source ground motions by conducting a sensitivity study with variations in six earthquake source parameters for both a strike-slip fault (M 7.0-7.1) and a thrust fault (M 6.6-7.0). The directivity of the ruptures creates large displacement and velocity pulses in the forward direction. The dynamic displacements close to the fault are comparable to the average slip. The ground motions exhibit the greatest sensitivity to the fault depth with moderate sensitivity to the rupture speed, peak slip rate, and average slip. For strike-slip faults and thrust faults with surface rupture, the maximum ground displacements and velocities occur in the region where the near-source factor from the 1997 Uniform Building Code is the largest. However, for a buried thrust fault the peak ground motions can occur up-dip from this region.


Item Type:Article
ORCID:
AuthorORCID
Heaton, Thomas H.0000-0003-3363-2197
Additional Information:© 2001 Earthquake Engineering Research Institute. This work was supported by a National Science Foundation fellowship, the Southern California Earthquake Center, and the California Institute of Technology. We would like to thank Steve Day and two anonymous reviewers for their helpful comments. Access to the 512 Node Intel Paragon computer, located at the California Institute of Technology, was provided by the Center for Advanced Computing Research.
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Southern California Earthquake Center (SCEC)UNSPECIFIED
CaltechUNSPECIFIED
Subject Keywords:Uniform Building Code (UBC); 1997 edition, United States; building codes
Issue or Number:2
Record Number:CaltechAUTHORS:AAGes01
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:AAGes01
Alternative URL:http://dx.doi.org/10.1193/1.1586171
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5027
Collection:CaltechAUTHORS
Deposited By: Lindsay Cleary
Deposited On:22 Sep 2006
Last Modified:02 Oct 2019 23:18

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