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    Importance of Cable Vibration in Dynamics of Cable‐Stayed Bridges

    Source: Journal of Engineering Mechanics:;1991:;Volume ( 117 ):;issue: 011
    Author:
    Ahmed M. Abdel‐Ghaffar
    ,
    Magdi A. Khalifa
    DOI: 10.1061/(ASCE)0733-9399(1991)117:11(2571)
    Publisher: American Society of Civil Engineers
    Abstract: The present study deals with the dynamic behavior of cable‐stayed bridges when the vibration characteristics of the stay cables are taken into consideration. Such complex vibrations are strongly coupled with the bridge deck and tower motions and were either overlooked or treated independently in previous dynamic analyses. By discretizing each stay cable into small elements, there results new and numerous very complex pure cable vibration modes, as well as new deck‐tower bridge modes. It would be impossible to predict such motions by using, analytically, the linearized natural frequency expressions for the individual inclined cables. The multiple‐element cable system also provides coupled deck‐cable motions involving lateral bending and torsional motions of the deck as well as vertical and swinging cable motions; such motions cannot be predicted using a one‐element cable discretization system. The effect of these modes on the participation factors of any earthquake‐response calculation is significant.
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      Importance of Cable Vibration in Dynamics of Cable‐Stayed Bridges

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    contributor authorAhmed M. Abdel‐Ghaffar
    contributor authorMagdi A. Khalifa
    date accessioned2017-05-08T22:36:06Z
    date available2017-05-08T22:36:06Z
    date copyrightNovember 1991
    date issued1991
    identifier other%28asce%290733-9399%281991%29117%3A11%282571%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/83398
    description abstractThe present study deals with the dynamic behavior of cable‐stayed bridges when the vibration characteristics of the stay cables are taken into consideration. Such complex vibrations are strongly coupled with the bridge deck and tower motions and were either overlooked or treated independently in previous dynamic analyses. By discretizing each stay cable into small elements, there results new and numerous very complex pure cable vibration modes, as well as new deck‐tower bridge modes. It would be impossible to predict such motions by using, analytically, the linearized natural frequency expressions for the individual inclined cables. The multiple‐element cable system also provides coupled deck‐cable motions involving lateral bending and torsional motions of the deck as well as vertical and swinging cable motions; such motions cannot be predicted using a one‐element cable discretization system. The effect of these modes on the participation factors of any earthquake‐response calculation is significant.
    publisherAmerican Society of Civil Engineers
    titleImportance of Cable Vibration in Dynamics of Cable‐Stayed Bridges
    typeJournal Paper
    journal volume117
    journal issue11
    journal titleJournal of Engineering Mechanics
    identifier doi10.1061/(ASCE)0733-9399(1991)117:11(2571)
    treeJournal of Engineering Mechanics:;1991:;Volume ( 117 ):;issue: 011
    contenttypeFulltext
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