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    Vibration Studies of Tsing Ma Suspension Bridge

    Source: Journal of Bridge Engineering:;1997:;Volume ( 002 ):;issue: 004
    Author:
    Y. L. Xu
    ,
    J. M. Ko
    ,
    W. S. Zhang
    DOI: 10.1061/(ASCE)1084-0702(1997)2:4(149)
    Publisher: American Society of Civil Engineers
    Abstract: A three-dimensional dynamic finite element model is established for the Tsing Ma long suspension Bridge in Hong Kong. The two bridge towers made up of reinforced concrete are modeled by three-dimensional Timoshenko beam elements with rigid arms at the connections between columns and beams. The cables and suspenders are modeled by cable elements accounting for geometric nonlinearity due to cable tension. The hybrid steel deck is represented by a single beam with equivalent cross-sectional properties determined by detailed finite element analyses of sectional models. The modal analysis is then performed to determine natural frequencies and mode shapes of lateral, vertical, torsional, longitudinal, and coupled vibrations of the bridge. The results show that the natural frequencies of the bridge are very closely spaced; the first 40 natural frequencies range from 0.068 to 0.616 Hz only. The computed normal modes indicate interactions between the main span and side span, and between the deck, cables, and towers. Significant coupling between torsional and lateral modes is also observed. The numerical results are in excellent agreement with the measured first 18 natural frequencies and mode shapes. The established dynamic model and computed dynamic characteristics can serve further studies on a long-term monitoring system and aerodynamic analysis of the bridge.
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      Vibration Studies of Tsing Ma Suspension Bridge

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    http://yetl.yabesh.ir/yetl1/handle/yetl/71032
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    contributor authorY. L. Xu
    contributor authorJ. M. Ko
    contributor authorW. S. Zhang
    date accessioned2017-05-08T22:05:24Z
    date available2017-05-08T22:05:24Z
    date copyrightNovember 1997
    date issued1997
    identifier other22089790.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/71032
    description abstractA three-dimensional dynamic finite element model is established for the Tsing Ma long suspension Bridge in Hong Kong. The two bridge towers made up of reinforced concrete are modeled by three-dimensional Timoshenko beam elements with rigid arms at the connections between columns and beams. The cables and suspenders are modeled by cable elements accounting for geometric nonlinearity due to cable tension. The hybrid steel deck is represented by a single beam with equivalent cross-sectional properties determined by detailed finite element analyses of sectional models. The modal analysis is then performed to determine natural frequencies and mode shapes of lateral, vertical, torsional, longitudinal, and coupled vibrations of the bridge. The results show that the natural frequencies of the bridge are very closely spaced; the first 40 natural frequencies range from 0.068 to 0.616 Hz only. The computed normal modes indicate interactions between the main span and side span, and between the deck, cables, and towers. Significant coupling between torsional and lateral modes is also observed. The numerical results are in excellent agreement with the measured first 18 natural frequencies and mode shapes. The established dynamic model and computed dynamic characteristics can serve further studies on a long-term monitoring system and aerodynamic analysis of the bridge.
    publisherAmerican Society of Civil Engineers
    titleVibration Studies of Tsing Ma Suspension Bridge
    typeJournal Paper
    journal volume2
    journal issue4
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/(ASCE)1084-0702(1997)2:4(149)
    treeJournal of Bridge Engineering:;1997:;Volume ( 002 ):;issue: 004
    contenttypeFulltext
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