Authors / CoAuthors
Ryu, H. | Luco, N. | Uma, S.R. | Liel, A.B.
Abstract
We present a methodology for developing fragilities for mainshock-damaged structures, "aftershock fragility", by performing incremental dynamic analysis (IDA) with a sequence of mainshock-aftershock ground motions. The aftershock fragility herein is distinguished from a conventional fragility for an intact structure. We estimate seismic response of a mainshock-damaged building by performing nonlinear time history analysis with a sequence of mainshock and aftershock ground motions (so-called "back-to-back" dynamic analysis). We perform the back-to-back dynamic analyses for a number of levels of mainshock response/damage, and a number of sequences of mainshock and aftershock ground motions. With estimated seismic responses from the back-to-back dynamic analyses, we compute various damage state transition probabilities, the probability of exceeding a higher damage state from an aftershock given a damage state due to a mainshock. For an illustration of the methodology, we develop an aftershock fragility for a typical New Zealand 5-storey reinforced concrete moment frame building. The building is modeled using a single-degree-of-freedom (SDOF) damped nonlinear oscillator with force-deformation behavior represented by a multi-linear capacity/pushover curve with moderate pinching hysteresis and medium cyclic deterioration.
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document
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144241
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Keywords
- theme.ANZRC Fields of Research.rdf
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- Earthquake EngineeringEARTH SCIENCES
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- fragility
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- mainshock
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- dynamic analysis
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- Published_External
Publication Date
2020-08-24T03:46:43
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Peer reviewed paper, presented at the 9th Pacific Conference on Earthquake Engineering 2011 (PCEE), at The University of Auckland, 14 to 16 April 2011.
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Peer reviewed paper, presented at the 9th Pacific Conference on Earthquake Engineering 2011 (PCEE), at The University of Auckland, 14 to 16 April 2011.
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