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    Creep-Effect on Mechanical Behavior of Concrete Confined by FRP under Axial Compression

    Source: Journal of Engineering Mechanics:;2009:;Volume ( 135 ):;issue: 011
    Author:
    Yuanfeng Wang
    ,
    Dianjie Zhang
    DOI: 10.1061/(ASCE)0733-9399(2009)135:11(1315)
    Publisher: American Society of Civil Engineers
    Abstract: Despite many successes in concrete creep studies, its effect on the mechanical behavior of concrete members is far from a thorough case-specific understanding. For the members that have been subjected to a long-term load, the classical stress-strain models describing the short-term behavior of either confined or unconfined concrete are unsuitable. In order to investigate this creep-effect, an experiment on eight concrete cylindrical columns confined by fiber-reinforced polymer (FRP) is carried out. Based on the theory of plasticity for concrete, a constitutive model that takes into account the effect of creep on mechanical behavior of concrete confined by FRP is presented. In the model, the creep law inspired in the microprestress-solidification theory is generalized to triaxial stress condition for the calculation of the creep of the concrete columns confined by FRP. The predictions of the model agree well with the experimental results. The present study indicates that the creep increases the elastic modulus, slightly decreases the compressive strength, and degrades the deformation capability of the concrete confined by FRP.
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      Creep-Effect on Mechanical Behavior of Concrete Confined by FRP under Axial Compression

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    contributor authorYuanfeng Wang
    contributor authorDianjie Zhang
    date accessioned2017-05-08T22:19:19Z
    date available2017-05-08T22:19:19Z
    date copyrightNovember 2009
    date issued2009
    identifier other40961020.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/77580
    description abstractDespite many successes in concrete creep studies, its effect on the mechanical behavior of concrete members is far from a thorough case-specific understanding. For the members that have been subjected to a long-term load, the classical stress-strain models describing the short-term behavior of either confined or unconfined concrete are unsuitable. In order to investigate this creep-effect, an experiment on eight concrete cylindrical columns confined by fiber-reinforced polymer (FRP) is carried out. Based on the theory of plasticity for concrete, a constitutive model that takes into account the effect of creep on mechanical behavior of concrete confined by FRP is presented. In the model, the creep law inspired in the microprestress-solidification theory is generalized to triaxial stress condition for the calculation of the creep of the concrete columns confined by FRP. The predictions of the model agree well with the experimental results. The present study indicates that the creep increases the elastic modulus, slightly decreases the compressive strength, and degrades the deformation capability of the concrete confined by FRP.
    publisherAmerican Society of Civil Engineers
    titleCreep-Effect on Mechanical Behavior of Concrete Confined by FRP under Axial Compression
    typeJournal Paper
    journal volume135
    journal issue11
    journal titleJournal of Engineering Mechanics
    identifier doi10.1061/(ASCE)0733-9399(2009)135:11(1315)
    treeJournal of Engineering Mechanics:;2009:;Volume ( 135 ):;issue: 011
    contenttypeFulltext
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