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.

Allowing Traffic Over Mainshock-Damaged Bridges / Franchin, Paolo; Pinto, Paolo Emilio. - In: JOURNAL OF EARTHQUAKE ENGINEERING. - ISSN 1363-2469. - STAMPA. - 13:5(2009), pp. 585-599. [10.1080/13632460802421326]

Allowing Traffic Over Mainshock-Damaged Bridges

FRANCHIN, Paolo;
2009

Abstract

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.
aftershock; progressive damage; time-varying collapse risk; transition fragility
01 Pubblicazione su rivista::01a Articolo in rivista
Allowing Traffic Over Mainshock-Damaged Bridges / Franchin, Paolo; Pinto, Paolo Emilio. - In: JOURNAL OF EARTHQUAKE ENGINEERING. - ISSN 1363-2469. - STAMPA. - 13:5(2009), pp. 585-599. [10.1080/13632460802421326]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/225981
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