Seismic Loss Estimation of Residential Wood-Frame Buildings in Southwestern British Columbia Considering Mainshock-Aftershock Sequences
Publication: Journal of Performance of Constructed Facilities
Volume 28, Issue 6
Abstract
Earthquakes are rare natural catastrophes, causing severe impacts on society due to loss of lives, damage to built facilities, and business interruptions. After a large earthquake (mainshock), many induced events (aftershocks) may be triggered and cause additional damage or even collapse to mainshock-damaged buildings. To reduce seismic hazard and risk of aftershocks and extend the current performance-based earthquake engineering framework, the effects of aftershocks on the seismic performance of structures should be incorporated. Considering an extensive set of real and artificial mainshock-aftershocks sequences, the vulnerability of residential wood-frame houses in southwestern British Columbia, Canada, is examined analytically using incremental dynamic analysis. Subsequently, seismic loss estimation is conducted for four wood-frame house types with different seismic capacities. The analysis results indicate: (1) moderate effects of aftershocks (5–20%) on maximum structural response and damage extent, and (2) significant impact of structural seismic capacity on estimated seismic loss.
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Acknowledgments
The authors thank two anonymous reviewers for their constructive comments which improved the original manuscript. The financial support provided through the Philip Leverhulme Prize is gratefully acknowledged. Strong ground-motion data were obtained from the PEER-NGA database (http://peer.berkeley.edu/nga/), the K-NET at http://www.k-net.bosai.go.jp, and the KiK-net at http://www.kik.bosai.go.jp.
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Published In
Journal of Performance of Constructed Facilities
Volume 28 • Issue 6 • December 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 24, 2013
Accepted: Sep 17, 2013
Published online: Sep 20, 2013
Discussion open until: Nov 24, 2014
Published in print: Dec 1, 2014
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