Bridge Seismic Retrofit Prioritization

by Khossrow Babaei, Wiss, Janney, Elstner Associates, Inc., Seattle, United States,
Neil M. Hawkins, Wiss, Janney, Elstner Associates, Inc., Seattle, United States,

Document Type: Proceeding Paper

Part of: Lifeline Earthquake Engineering


This paper describes a mathematical model developed to produce an index by which bridges in a network can be prioritized systematically for seismic retrofitting. The model incorporates two principal factors. Those are a criticality and a seismic vulnerability factor. The criticality factor represents the importance of the bridge in meeting the communities' emergency needs following the earthquake as well as the risk to the commuting public's lives caused by the collapse of the bridge. The seismic vulnerability factor represents the vulnerability of the structure to failure in the event of a severe earthquake. This paper describes the interaction of the principal factors to determine the priority index. Methods of quantifying the principal factors, and consequently quantifying the piority index, are shown.

Subject Headings: Bridges | Seismic tests | Seismic effects | Rehabilitation | Load and resistance factor design | Bridge failures | Bridge design | Ground motion

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