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    Decomposition of the Shear Capacity of Steel Fiber–Reinforced Concrete Coupling Beams

    Source: Journal of Structural Engineering:;2021:;Volume ( 147 ):;issue: 011::page 04021176-1
    Author:
    Xiangling Gao
    ,
    Dong Xiang
    ,
    Jie Li
    ,
    Xiaodan Ren
    DOI: 10.1061/(ASCE)ST.1943-541X.0003160
    Publisher: ASCE
    Abstract: Steel fiber–reinforced concrete (SFRC) is extensively used in coupling beams due to its superior mechanical properties. In this study, the two-parameter kinematic theory is modified by introducing the consideration of the critical crack angle and longitudinal reinforcement strain. The modified method is validated by 64 sets of experimental coupling beams in the literatures, and the predicted shear capacities are found to have good agreement with the test results. Moreover, the decomposition of the shear capacity provided by steel fibers, stirrups, the critical loading zone, aggregate interlock, and the dowel action of the longitudinal reinforcement can be evaluated separately. Thus, the effects of the span-to-depth ratio, volume fractions of fibers, and stirrup ratios on the shear capacity are investigated. Additionally, the equivalent substitution relationship between stirrups and steel fibers is quantified, which provides a solution to the reduction of the density of stirrups in coupling beams and similar components.
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      Decomposition of the Shear Capacity of Steel Fiber–Reinforced Concrete Coupling Beams

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    contributor authorXiangling Gao
    contributor authorDong Xiang
    contributor authorJie Li
    contributor authorXiaodan Ren
    date accessioned2022-02-01T22:11:32Z
    date available2022-02-01T22:11:32Z
    date issued11/1/2021
    identifier other%28ASCE%29ST.1943-541X.0003160.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4272799
    description abstractSteel fiber–reinforced concrete (SFRC) is extensively used in coupling beams due to its superior mechanical properties. In this study, the two-parameter kinematic theory is modified by introducing the consideration of the critical crack angle and longitudinal reinforcement strain. The modified method is validated by 64 sets of experimental coupling beams in the literatures, and the predicted shear capacities are found to have good agreement with the test results. Moreover, the decomposition of the shear capacity provided by steel fibers, stirrups, the critical loading zone, aggregate interlock, and the dowel action of the longitudinal reinforcement can be evaluated separately. Thus, the effects of the span-to-depth ratio, volume fractions of fibers, and stirrup ratios on the shear capacity are investigated. Additionally, the equivalent substitution relationship between stirrups and steel fibers is quantified, which provides a solution to the reduction of the density of stirrups in coupling beams and similar components.
    publisherASCE
    titleDecomposition of the Shear Capacity of Steel Fiber–Reinforced Concrete Coupling Beams
    typeJournal Paper
    journal volume147
    journal issue11
    journal titleJournal of Structural Engineering
    identifier doi10.1061/(ASCE)ST.1943-541X.0003160
    journal fristpage04021176-1
    journal lastpage04021176-16
    page16
    treeJournal of Structural Engineering:;2021:;Volume ( 147 ):;issue: 011
    contenttypeFulltext
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