[[alternative]]高鐵連續橋於列車通過之共振現象

[[abstract]]本文旨在探討高鐵連續橋受到高速列車通過之振動反應行為，文中將以具有等跨的均勻連續橋作為探討對象。藉由以梁構件對橋樑的模擬，及將列車載重則視為一序列的移動力量，我們便可透過解析及有限元素法的方式，來計算連續橋受列車作用的共振速度及衝擊反應。從本研究果顯示，當連續梁的跨數愈多時，其頻率分佈將愈為密集，於是橋梁被激發出來的主共振尖峰數目也將愈多；然而卻也因為橋梁鄰跨對振動能量的傳遞效應，使得愈多跨數的連續橋，其衝擊反應卻反而相對地下降。 In this paper, the vibration of continuous bridges subjected to the passage of high-speed trains is studied. Only the bridges with uniform spans are considered and the train moving over a bridge is modeled as a series of moving loads. According to the resonant formula of simple beams to moving loads, the effect of multiple resonant peaks for continuous bridges subjected to high-speed trains can be determined by analogy method. Based on the finite element method, the effect of the number of spans on the impact response of the continuous beams is presented. The results show that the more the number of spans of the continuous beam, the smaller the impact response is for the displacement.[[notice]]補正完畢[[journaltype]]國內[[booktype]]紙本[[countrycodes]]TW