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原文传递 Seismic Evaluation of the Tennessee River Bridges Along I-24 in Western Kentucky.

题名：	Seismic Evaluation of the Tennessee River Bridges Along I-24 in Western Kentucky.
作者：	zhao, t. ren, w. x. harik, i. e. hu, j. d.
关键词：	seismic effects, finite element method, earthquakes, field tests, dynamic structural analysis, dynamic response
摘要：	This report presents the seismic evaluation of the approaches and parallel bridges on I-24 crossing the Tennessee River between Marshall and Livingston counties in Western Kentucky. The main bridges are steel tied-arch bridges. The bridges are situated within the influence of the New Madrid Seismic Zone. The seismic evaluation program consisted of field testing, 3-dimensional finite element modeling and seismic response analysis. The dynamic properties of the main bridges are determined through field testing, and are used to calibrate the finite element models. The finite element model is then subjected to time histories of the 250-year and 500-year earthquake events. Stresses and displacements for these events are found to be within the acceptable limits. Analytical results indicate that the main bridge will withstand the 250-year and 500-year earthquakes without any significant damage and no loss-of-span. The supports with fixed bearings on the pier of the main bridge need to be retrofitted for the 500-year earthquake event. / NOTE:Research rept. (Final).
总页数：	u0707；126p
报告类型：	科技报告