Validation of Fault Rupture-Response Spectrum Analysis Method for Curved Bridges Crossing Strike-Slip Fault Rupture Zones
Publication: Journal of Bridge Engineering
Volume 19, Issue 5
Abstract
In response to the bridge damages observed in past earthquakes and the absence of practical analysis methods, a simplified analysis procedure named the fault rupture-response spectrum analysis (FR-RSA) method was developed in this research as an alternative to the onerous nonlinear response history analysis (RHA) method for bridges crossing strike-slip earthquake fault rupture zones. For validation of the FR-RSA method, this research investigated seismic responses of two representative curved bridges in California, including one three-span bridge and one four-span bridge. The selected bridges were analyzed using both the FR-RSA method and the nonlinear RHA method. Ground motion, earthquake fault rupture location, and fault orientation were varied in the analyses to expand the validation work under a broad range of the parameters. Result comparisons show that the FR-RSA method provides estimates of peak bridge displacement response that are close enough to the exact nonlinear RHA results in all considered cases; therefore, it is recommended for future practical application.
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Acknowledgments
The research presented in this paper was supported by CALTRANS under Contract No. 65A0379 with Dr. Allaoua Kartoum as the project manager. This support is gratefully acknowledged.
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Published In
Journal of Bridge Engineering
Volume 19 • Issue 5 • May 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 15, 2013
Accepted: Jan 6, 2014
Published online: Jan 29, 2014
Published in print: May 1, 2014
Discussion open until: Jun 29, 2014
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