Vehicle/bridge interaction dynamics for high speed rail suspension bridges considering multiple support ex citations
學年 102
學期 2
發表日期 2014-07-20
作品名稱 Vehicle/bridge interaction dynamics for high speed rail suspension bridges considering multiple support ex citations
作品名稱（其他語言）
著者 Yau, J.D.; L. Fryba; S.R. Kuo
作品所屬單位 淡江大學建築學系
出版者
會議名稱 11th World Congress on Computational Mechanics (WCCM XI)
會議地點 Barcelona, Spain
摘要 In this study, a railway suspension bridge is modeled as a suspended beam and the train over it as a sequence of moving sprung masses. To investigate the bridge response subjected to simultaneous actions of moving load and earthquake-induced support motions, the total response of the suspended beam under ground motions can be decomposed into two parts: the pseudo-static response and the inertia-dynamic component, in which the pseudostatic displacement is analytically obtained by exerting the support movements on the suspended beam statically and the governing equations in terms of the inertia-dynamic component as well as moving oscillators are transformed into a set of nonlinearly coupled generalized equations by Galerkin’s method. When conducting the dynamic response analysis of a suspended beam subject to moving vehicles and multiple support excitations, one needs to deal with nonlinear coupling vibration problems with time-dependent boundary conditions. Instead of solving the coupled equations for the inertia-dynamic generalized system containing pseudo-static support excitations and moving oscillators, this study treats all the nonlinear coupled terms as pseudo forces, and then solves the decoupled equations using Newmark’s β method with an incremental-iterative approach that can take all the nonlinear coupling effects into account. Numerical investigations demonstrate that the present solution technique is available in conducting the dynamic interaction problem with support excitations. Moreover, non-uniform seismic inputs may amplify the both responses of the suspended beam and moving vehicles over it significantly. Such an effect is often neglected by the assumption of uniform seismic ground motions in conventional design of bridge structures.
關鍵字 High speed rail; Moving loads; Multiple support motions; Suspension bridge
語言 en
收錄於
會議性質 國際
校內研討會地點
研討會時間 20140720~20140725
通訊作者
國別 ESP
公開徵稿
出版型式
出處
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