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Danny Arroyo and Mario Ordaz
Inelastic-strength spectra in probabilistic seismic-hazard analysis
Bulletin of the Seismological Society of America (December 2007), 97(6):2171-2181
Abstract: Index Terms/Descriptors: GeoRef, Copyright 2008, American Geological Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
A comparison between two methods to compute uniform-hazard inelastic-strength spectra for single-degree-of-freedom systems subjected to earthquake ground motions is presented. In the first method the inelastic spectra are obtained by reducing uniform-hazard elastic pseudoacceleration (SA) spectra with deterministic strength-reduction factors, while in the second method inelastic-strength spectra are computed with a probabilistic seismic-hazard analysis that accounts for the variability in the strength-reduction factor. It is demonstrated that the first method yields similar results to the probabilistic analysis if the product of the slope of the hazard curve of SA and the standard deviation of the logarithm of the strength-reduction factor is small.
algorithms; aseismic design; buildings; earthquakes; elasticity; geologic hazards; ground motion; probability; risk assessment; seismic response; seismic risk; statistical analysis; strength