Simplified PBEE to Estimate Economic Seismic Risk for Buildings
- Creators
- Porter, Keith A.
- Beck, James L.
- Others:
- Fajfar, Peter
- Krawinkler, Helmut
Abstract
A seismic risk assessment is often performed on behalf of a buyer of large commercial buildings in seismically active regions. One outcome of the assessment is that a probable maximum loss (PML) is computed. PML is of limited use to real-estate investors as it has no place in a standard financial analysis and reflects too long a planning period for what-if scenarios. We introduce an alternative to PML called probable frequent loss (PFL), defined as the mean loss resulting from an economic-basis earthquake such as shaking with 10% exceedance probability in 5 years. PFL is approximately related to expected annualized loss (EAL) through a site economic hazard coefficient (H) introduced here. PFL and EAL offer three advantages over PML: (1) meaningful planning period; (2) applicability in financial analysis (making seismic risk a potential market force); and (3) can be estimated by a rigorous but simplified PBEE method that relies on a single linear structural analysis. We illustrate using 15 example buildings, including a 7-story nonductile reinforced-concrete moment-frame building in Van Nuys, CA and 14 buildings from the CUREE-Caltech Woodframe Project.
Attached Files
Submitted - Porter-2004-Simplified-PBEE.pdf
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Additional details
- Eprint ID
- 33980
- Resolver ID
- CaltechAUTHORS:20120910-154417059
- Created
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2012-09-12Created from EPrint's datestamp field
- Updated
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2019-10-03Created from EPrint's last_modified field