教師資料查詢 | 類別: 會議論文 | 教師: 姚忠達 Jong-dar Yau (瀏覽個人網頁)

標題:Vehicle/bridge interaction dynamics for high speed rail suspension bridges considering multiple support excitations
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 excitations
作品名稱(其他語言)
著者Yau, JD; Fryba, L.
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 (WCCM2014)
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 pseudo-static 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 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
語言英文
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
國別西班牙
公開徵稿Y
出版型式電子版
出處11th World Congress on Computational Mechanics (WCCM2014)
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