A methodology for post-mainshock probabilistic assessment of building collapse risk
By: N. Luco, M.C. Gerstenberger, S.R. Uma, H. Ryu, A.B. Liel, and M. Raghunandan
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Abstract
This paper presents a methodology for post-earthquake probabilistic risk (of damage) assessment that we propose in order to develop a computational tool for automatic or semi-automatic assessment. The methodology utilizes the same so-called risk integral which can be used for pre-earthquake probabilistic assessment. The risk integral couples (i) ground motion hazard information for the location of a structure of interest with (ii) knowledge of the fragility of the structure with respect to potential ground motion intensities. In the proposed post-mainshock methodology, the ground motion hazard component of the risk integral is adapted to account for aftershocks which are deliberately excluded from typical pre-earthquake hazard assessments and which decrease in frequency with the time elapsed since the mainshock. Correspondingly, the structural fragility component is adapted to account for any damage caused by the mainshock, as well as any uncertainty in the extent of this damage. The result of the adapted risk integral is a fully-probabilistic quantification of post-mainshock seismic risk that can inform emergency response mobilization, inspection prioritization, and re-occupancy decisions.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | A methodology for post-mainshock probabilistic assessment of building collapse risk |
| ISBN | 9780908960583 |
| Year Published | 2011 |
| Language | English |
| Publisher | New Zealand Society for Earthquake Engineering |
| Publisher location | Wellington, New Zealand |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 8 p.; Paper Number 210 |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | Proceedings of the Ninth Pacific Conference on Earthquake Engineering: Building an earthquake resilient society |
| Conference Title | 2011 Pacific Conference on Earthquake Engineering |
| Conference Location | Aukland, New Zealand |
| Conference Date | April 14-16, 2011 |
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