User Losses in Earthquake-Damaged Roadway Networks

by Chris Hendrickson, (A.M.ASCE), Asst. Prof. of Civ. Engrg.; Carnegie-Mellon Univ., Pittsburgh, Pa.,
Krishnaswami Siddharthan, Graduate Student; School of Urban and Public Affairs, Carnegie-Mellon Univ., Pittsburgh, Pa.,
Irving J. Oppenheim, (A.M.ASCE), Assoc. Prof. of Architecture & Civ. Engrg.; Carnegie-Mellon Univ., Pittsburgh, Pa.,

Serial Information: Journal of the Technical Councils of ASCE, 1980, Vol. 106, Issue 1, Pg. 117-127

Document Type: Journal Paper


Network analysis of an earthquake-damaged arterial system is performed using a highly efficient traffic assignment algorithm. The reduced trip volume and increased average trip time can be obtained for any simulated earthquake; the (hourly) loss in total net user benefit is obtained, and is labelled the user loss. The analysis is repeated for a set of discrete earthquakes which model the seismic hazard. The end result is the annual expected user loss; this is a direct measure of seismic risk. In one example the user loss increases more rapidly with intensity than does the repair-replacement costs.

Subject Headings: Seismic effects | Earthquakes | Highways and roads | Traffic analysis | Travel patterns | Seismic tests | Network analysis | Traffic assignment

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