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    Upgrading of Braced Frames for Potential Local Failures

    Source: Journal of Structural Engineering:;1996:;Volume ( 122 ):;issue: 005
    Author:
    Hae In Kim
    ,
    Subhash C. Goel
    DOI: 10.1061/(ASCE)0733-9445(1996)122:5(470)
    Publisher: American Society of Civil Engineers
    Abstract: This study concerns a type of local failure that was observed during the 1989 Loma Prieta earthquake: a brace-to-beam connection in concentric braced frame structures due to lack of adequate lateral support to both flanges of the beam. Experimental and analytical studies were carried out to investigate the failure. Field observed local failure of the brace-to-beam connection was reproduced in the laboratory test specimen. The hysteretic loops of the locally failed specimen showed excessive “pinching” when compared to those of bracing members with adequate lateral support. Local failure was confirmed by a finite element analysis. Several upgrading schemes were evaluated by the finite element analyses. The analyses showed that the specimen with a diagonal stiffener in the beam web along the centerline of the brace member axis performed best. The effectiveness of diagonal web stiffeners was verified experimentally.
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      Upgrading of Braced Frames for Potential Local Failures

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    http://yetl.yabesh.ir/yetl1/handle/yetl/32456
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    • Journal of Structural Engineering

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    contributor authorHae In Kim
    contributor authorSubhash C. Goel
    date accessioned2017-05-08T20:56:16Z
    date available2017-05-08T20:56:16Z
    date copyrightMay 1996
    date issued1996
    identifier other%28asce%290733-9445%281996%29122%3A5%28470%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/32456
    description abstractThis study concerns a type of local failure that was observed during the 1989 Loma Prieta earthquake: a brace-to-beam connection in concentric braced frame structures due to lack of adequate lateral support to both flanges of the beam. Experimental and analytical studies were carried out to investigate the failure. Field observed local failure of the brace-to-beam connection was reproduced in the laboratory test specimen. The hysteretic loops of the locally failed specimen showed excessive “pinching” when compared to those of bracing members with adequate lateral support. Local failure was confirmed by a finite element analysis. Several upgrading schemes were evaluated by the finite element analyses. The analyses showed that the specimen with a diagonal stiffener in the beam web along the centerline of the brace member axis performed best. The effectiveness of diagonal web stiffeners was verified experimentally.
    publisherAmerican Society of Civil Engineers
    titleUpgrading of Braced Frames for Potential Local Failures
    typeJournal Paper
    journal volume122
    journal issue5
    journal titleJournal of Structural Engineering
    identifier doi10.1061/(ASCE)0733-9445(1996)122:5(470)
    treeJournal of Structural Engineering:;1996:;Volume ( 122 ):;issue: 005
    contenttypeFulltext
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