Effect of aftershock intensity on seismic collapse fragilities

Document Type

Article

Publication Date

1-1-2014

Abstract

Copyright © 2014 Inderscience Enterprises Ltd. This paper presents a procedure to compute the sensitivity of a mainshock (MS)-damaged building's collapse probability to earthquake intensity as a function of magnitude or site-to-source distance. Specifically, the effect of earthquake magnitude and spatial distribution of aftershocks on collapse fragilities is investigated. Aftershock (AS) fragilities for different siteto-source distances are examined by performing incremental dynamic analysis (IDA) using a sequence of MS+AS ground motions. The effect of MS damage is to alter the fragilities which can be quantified for the building investigated. It is observed that the collapse fragilities have a reasonable variation in collapse probabilities with changing AS magnitude and/or site-to-source distance.

Publication Title

International Journal of Reliability and Safety

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