Near-Fault and Far-Field Strong Ground-Motion Simulation for Earthquake Engineering Applications Using the Specific Barrier Model
Publication: Journal of Structural Engineering
Volume 137, Issue 3
Abstract
Codes for aseismic design may require use of recorded ground motions as input in dynamic analysis. When records are not available, motions must be simulated. The specific barrier model (SBM) is particularly useful in this context because (1) it provides the most complete, yet parsimonious, self-consistent description of the earthquake faulting processes that are responsible for the generation of high-frequency radiation; (2) it has been calibrated to earthquakes of three different tectonic regions; and (3) its key parameter, the barrier interval, is related to the duration of the near-fault pulses (NFP), the most damaging feature of near-fault motions. We carry out “blind” (i.e., using the minimum amount of a priori source information) simulations of strong motions of well-recorded earthquakes of magnitudes between 6.2–7.6. We assess the quality of fit of the simulated time histories to the recorded motions and show that the simulations exhibit close to zero bias over frequencies of 0.1–20 Hz for the data set used. This exercise illustrates that the method will provide earthquake motions that can be used with confidence in aseismic design.
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Acknowledgments
This work was supported by the Earthquake Engineering Research Centers Program of the National Science Foundation under Award Number NSFEEC-9701471 to the Multidisciplinary Center for Earthquake Engineering Research (Contract Numbers MCEER 00-0102, 01-0102, 02-0102, 03/0.1, and 04-0001). The first author would like to acknowledge additional support from the Icelandic Centre for Research (RANNIS) Project Grant No. UNSPECIFIED090049021.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 3 • March 2011
Pages: 433 - 444
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 7, 2008
Accepted: Jul 22, 2009
Published online: Mar 22, 2010
Published in print: Mar 1, 2011
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