Journal
JOURNAL OF EARTHQUAKE ENGINEERING
Volume 13, Issue 5, Pages 585-599Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13632460802421326
Keywords
Aftershock; Progressive Damage; Transition Fragility; Time-Varying Collapse Risk
Funding
- LESSLOSS Project-Subproject [9]
- European Commission [GOCE-CT-2003-505488]
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A criterion is proposed for deciding whether, after a damaging mainshock, a bridge can still be open for either emergency or ordinary traffic. The criterion is based on the comparison between the collapse risk of the mainshock-damaged structure and the pre-mainshock risk of the intact structure. The approach requires fragilities for multiple damage states for the intact structure, and transition probabilities from these states to collapse for the damaged structure. The aftershock risk decreases with time, hence a decision for reopening might have to wait until the risk level goes down to an acceptable value. A realistic application demonstrates the approach.
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