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    题名: Interaction response of train loads moving over a two-span continuous beam
    作者: Wang, Y. J.;Wei, Q. C.;Yau, Jong-dar
    贡献者: 淡江大學建築學系
    关键词: Moving vehicles;two-span continuous beam;resonance;sub-resonance;train
    日期: 2013-02
    上传时间: 2013-03-16 13:43:44 (UTC+8)
    出版者: Singapore: World Scientific Publishing Co. Pte. Ltd.
    摘要: The objective of this study is to investigate the resonance and sub-resonance acceleration response of a two-span continuous railway bridge under the passage of moving train loadings. The continuous bridge is modeled as a Bernoulli-Euler beam with uniform span length and the moving train is simulated as a series of equidistant two degrees-of-freedom (2-DOF) mass-spring-damper units. The modal superposition method is adopted to compute the interaction dynamics of the train-bridge system. The numerical analyses indicate that (1) the train-induced resonance of the two-span continuous beam may result in significant amplification of the dynamic response of the train/bridge system; (2) for a two-span continuous beam, the first two resonant speeds may fall in the range of operating speeds of high-speed trains, which can lead to highly amplified vehicle responses; (3) due to the presence of sub-resonant peaks, the maximum acceleration of the two-span continuous beam need not occur at the midpoint of the beam; (4) inclusion of damping of a beam is helpful for reducing the train-induced resonant response on the beam, but the first two resonant peaks of the coupling system remain unchanged.
    關聯: International Journal of Structural Stability & Dynamics 13(1), 1350002(18pages)
    DOI: 10.1142/S0219455413500028
    显示于类别:[建築學系暨研究所] 期刊論文


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