淡江大學機構典藏:Item 987654321/124251
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    题名: Shifted Resonance of Railway Bridges Under Trains Passing by Each Other
    作者: Yao, Zhongda
    关键词: Added mass;high-speed railway bridge;resonance;shifted resonance;VBI
    日期: 2022-01-17
    上传时间: 2023-07-19 12:05:18 (UTC+8)
    出版者: World Scienti¯c Publishing Company
    摘要: Dynamic vehicle–bridge interaction (VBI) plays a crucial role in the train-induced vibrations of a railway bridge for its coupling effects may reduce the bridge response and down-shift the resonant speed. The commonly used nominal theoretical resonant speed (=fbD)
    of a typical railway bridge, however, is only related to the bridge frequency (fb)
    and car length (D)
    , but it neglects the VBI effects of the moving trains. Such a shifted resonance phenomenon would become significant for a bridge under two trains passing by each other. This study develops a method using an equivalent modal mass to be added onto the bridge to account for the frequency shift due to the presence of multiple train cars for estimation of the shifted resonant speed. The numerical study demonstrates that the proposed method can predict the shifted resonant speed and explain the shifted-resonance phenomenon of railway bridges under train passages.
    關聯: International Journal of Structural Stability and Dynamics 22(7),　2271001
    DOI: 10.1142/S0219455422710018
    显示于类别:[建築學系暨研究所] 期刊論文

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