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    Path-Dependent Stress–Strain Model for FRP-Confined Recycled Brick Aggregate Concrete

    Source: Journal of Composites for Construction:;2022:;Volume ( 026 ):;issue: 004::page 04022035
    Author:
    T. Jiang
    ,
    P. Chen
    ,
    P. Ji
    ,
    G. M. Chen
    DOI: 10.1061/(ASCE)CC.1943-5614.0001225
    Publisher: ASCE
    Abstract: Fiber-reinforced polymer (FRP) confinement has shown promise as an alternative method aimed at enabling the structural use of recycled brick aggregate concrete (RBAC) in columns. To facilitate practical applications, an existing stress–strain model for FRP-confined normal concrete is modified in this paper to extend its applicability to FRP-confined RBAC. The modification was based on a rigorous approach involving a direct examination of the path-independent assumption, which was made possible by conducting companion tests on actively confined and FRP-confined RBAC. Comparisons of the stress–strain and dilation responses obtained from the two confinement schemes showed that the axial strain of RBAC can be considered path-independent while the axial stress of RBAC tends to be path-dependent. The underlying cause is probably that the weak resistance of recycled brick aggregate (RBA) makes itself a medium for crack propagation. The effect of path dependence is accounted for in the modified model by purposefully weakening the stress–strain response of actively confined RBAC to correct the overestimate found in the axial stresses of FRP-confined RBAC, which originates from adopting the path-independent assumption.
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      Path-Dependent Stress–Strain Model for FRP-Confined Recycled Brick Aggregate Concrete

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4286921
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    contributor authorT. Jiang
    contributor authorP. Chen
    contributor authorP. Ji
    contributor authorG. M. Chen
    date accessioned2022-08-18T12:37:25Z
    date available2022-08-18T12:37:25Z
    date issued2022/05/27
    identifier other%28ASCE%29CC.1943-5614.0001225.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4286921
    description abstractFiber-reinforced polymer (FRP) confinement has shown promise as an alternative method aimed at enabling the structural use of recycled brick aggregate concrete (RBAC) in columns. To facilitate practical applications, an existing stress–strain model for FRP-confined normal concrete is modified in this paper to extend its applicability to FRP-confined RBAC. The modification was based on a rigorous approach involving a direct examination of the path-independent assumption, which was made possible by conducting companion tests on actively confined and FRP-confined RBAC. Comparisons of the stress–strain and dilation responses obtained from the two confinement schemes showed that the axial strain of RBAC can be considered path-independent while the axial stress of RBAC tends to be path-dependent. The underlying cause is probably that the weak resistance of recycled brick aggregate (RBA) makes itself a medium for crack propagation. The effect of path dependence is accounted for in the modified model by purposefully weakening the stress–strain response of actively confined RBAC to correct the overestimate found in the axial stresses of FRP-confined RBAC, which originates from adopting the path-independent assumption.
    publisherASCE
    titlePath-Dependent Stress–Strain Model for FRP-Confined Recycled Brick Aggregate Concrete
    typeJournal Article
    journal volume26
    journal issue4
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0001225
    journal fristpage04022035
    journal lastpage04022035-17
    page17
    treeJournal of Composites for Construction:;2022:;Volume ( 026 ):;issue: 004
    contenttypeFulltext
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