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    Full-Scale Tests of Seismic Cable Restrainer Retrofits for Simply Supported Bridges

    Source: Journal of Bridge Engineering:;2003:;Volume ( 008 ):;issue: 004
    Author:
    Reginald DesRoches
    ,
    Thomas Pfeifer
    ,
    Roberto T. Leon
    ,
    Tam Lam
    DOI: 10.1061/(ASCE)1084-0702(2003)8:4(191)
    Publisher: American Society of Civil Engineers
    Abstract: Many parts of the central and southeastern United States have recently begun initiating seismic retrofit programs for bridges on major interstate highways. One of the most common retrofit strategies is to provide cable restrainers at the intermediate hinges and abutments in order to reduce the likelihood of collapse due to unseating. To evaluate the force-displacement behavior of the cable restrainer retrofits, a full-scale bridge setup was constructed based on an existing multispan, simply supported steel girder bridge in Tennessee, that has been considered for seismic retrofit using cable restrainers. Seismic cable restrainers were connected to the bridge pier using steel bent plates, angles, and undercut anchors embedded in the concrete as specified by typical bridge retrofit plans. The full-scale bridge model was subjected to monotonic loading to test the capacity of the cable restrainer system and to determine the modes of failure. The results showed that the primary modes of failure are in the connection elements of the pier and girders, and they occur at force levels much lower than the strength of the cable. Modifications to the connection elements were designed and tested. The new connections resulted in a higher strength and deformation capacity of the cable restrainer assembly.
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      Full-Scale Tests of Seismic Cable Restrainer Retrofits for Simply Supported Bridges

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    http://yetl.yabesh.ir/yetl1/handle/yetl/50674
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    • Journal of Bridge Engineering

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    contributor authorReginald DesRoches
    contributor authorThomas Pfeifer
    contributor authorRoberto T. Leon
    contributor authorTam Lam
    date accessioned2017-05-08T21:25:06Z
    date available2017-05-08T21:25:06Z
    date copyrightJuly 2003
    date issued2003
    identifier other%28asce%291084-0702%282003%298%3A4%28191%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/50674
    description abstractMany parts of the central and southeastern United States have recently begun initiating seismic retrofit programs for bridges on major interstate highways. One of the most common retrofit strategies is to provide cable restrainers at the intermediate hinges and abutments in order to reduce the likelihood of collapse due to unseating. To evaluate the force-displacement behavior of the cable restrainer retrofits, a full-scale bridge setup was constructed based on an existing multispan, simply supported steel girder bridge in Tennessee, that has been considered for seismic retrofit using cable restrainers. Seismic cable restrainers were connected to the bridge pier using steel bent plates, angles, and undercut anchors embedded in the concrete as specified by typical bridge retrofit plans. The full-scale bridge model was subjected to monotonic loading to test the capacity of the cable restrainer system and to determine the modes of failure. The results showed that the primary modes of failure are in the connection elements of the pier and girders, and they occur at force levels much lower than the strength of the cable. Modifications to the connection elements were designed and tested. The new connections resulted in a higher strength and deformation capacity of the cable restrainer assembly.
    publisherAmerican Society of Civil Engineers
    titleFull-Scale Tests of Seismic Cable Restrainer Retrofits for Simply Supported Bridges
    typeJournal Paper
    journal volume8
    journal issue4
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/(ASCE)1084-0702(2003)8:4(191)
    treeJournal of Bridge Engineering:;2003:;Volume ( 008 ):;issue: 004
    contenttypeFulltext
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