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原文传递 Socio-Economic Effect of Seismic Retrofit Implemented on Bridges in Los Angeles Highway Network.

题名：	Socio-Economic Effect of Seismic Retrofit Implemented on Bridges in Los Angeles Highway Network.
作者：	shinozuka, m. zhou, y. kim, s. h. murachi, y. banerjee, s.
关键词：	california, ground motion, socioeconomic effects, earthquake engineering, damage assessment, fragility, monte carlo method, computerized simulation, cost benefit analysis, finite element method, traffic flow, risk assessment
摘要：	This research studied socio-economic effect of the seismic retrofit implemented on bridges in Los Angeles Area Freeway Network. Firstly, advanced FE (Finite Element) modeling and nonlinear time history analysis are carried out to evaluate the seismic performance in the form of fragility curve, of representative bridges before and after retrofit. This analysis resulted in the determination of retrofit effect in such a way that we can quantify, through the change in fragility parameters, the improvement of bridge seismic performance after retrofit. Secondly, an integrated traffic assignment model is introduced to consider change in the post-earthquake OD characteristics due to building damage, and is utilized to evaluate the post-earthquake network performance of the damaged freeway network in terms of daily travel delay (compared with the travel time associated with the freeway network not damaged) and attendant opportunity cost. Furthermore, the process of system restoration is simulated to estimate the total social cost based on bridge functionality restoration process. The benefit from the retrofit is defined as the combined social and bridge restoration cost avoided by comparing the total social and bridge restoration cost before and after bridge retrofit. The benefit resulting from combined social and bridge restoration cost avoided together with the bridge retrofit cost are used for a cost-benefit analysis. / NOTE:Final rept.
总页数：	u0704；332p
报告类型：	科技报告