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    Title: 高速列車引致之橋墩基礎與地盤振動反應分析
    Other Titles: Analysis for Vibrations of Bridge-Pier-Foundation and Ground Induced by High-Speed-Rail Trains
    Authors: 鄭世豪;梁尹齡;張德文
    Contributors: 淡江大學土木工程學系
    Keywords: 高速列車;橋墩基礎;地盤振動;波動方程分析;High-speed-rail train;Bridge-pier foundation;Ground vibration;Wave equation analysis
    Date: 2005-09
    Issue Date: 2010-01-11 10:44:40 (UTC+8)
    Publisher: 臺北市:中華民國大地工程學會
    Abstract: 高速列車所引致之噪音和振動問題甚為重要,其在軟弱地盤所造成的長週期波微動現象向為工程界所關注。本研究係以簡易有效之分析取代有限元素法,討論列車作用下橋墩基礎和鄰近土層之振動反應。橋墩和土壤-基礎將拆解成個別之子結構模擬,並考慮上部橋梁結構和下部基礎之傳遞力平衡性,以包括土壤結構互制下基礎之柔度影響;同時配合土層衰減率求取鄰近地盤之振動反應,並使用1/3八音階寬頻分析了解不同車速行經所造成之地表振動量。研究發現:較低之車速反會引發該軟弱地盤產生較大之振動量,同時,改善基礎構造及地質特性改良將能減低地盤引致的振動現象。
    Noises and vibrations induced by high-speed-rail trains are important engineering issues. The micro ground vibrations of the long-period waves have received major attentions. This study presents a simplified but effective analysis for the train-induced vibrations of a bridge-pier-foundation and the near-by ground. While the superstructure is decomposed into a three DOF system, the under-ground foundation is modeled by a number of discrete elements using the wave equation analysis. Compatibility condition of the transmitting force between the superstructure and the foundation is satisfied, which provides the foundation flexibility to the analysis. The attenuation law for waves propagating along the ground surface and 1/3 octave band spectrum are both adopted for the discussions. This study found that the train-induced ground vibrations would be more pronounced at relatively high speeds, modifying the under-ground structure and improving the geological characteristic of the soils could more effectively reduce the ground vibrations.
    Relation: 2005第十一屆大地工程學術研討會暨國科會成果發表會論文集,9頁
    Appears in Collections:[土木工程學系暨研究所] 會議論文

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