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    Effect of GFRP Shear Stirrups on Strength of Two-Way GFRP RC Edge Slabs: Experimental and Finite-Element Investigations

    Source: Journal of Structural Engineering:;2020:;Volume ( 146 ):;issue: 005
    Author:
    Ahmed E. Salama
    ,
    Mohamed Hassan
    ,
    Brahim Benmokrane
    DOI: 10.1061/(ASCE)ST.1943-541X.0002593
    Publisher: ASCE
    Abstract: Glass-fiber-reinforced-polymer (GFRP) reinforcing bars have recently gained wide acceptance as a viable construction material for sustainable new constructions. Yet current codes and guidelines have not addressed the design of GFRP-reinforced-concrete edge-slab–column connections with FRP stirrups as shear reinforcement. This paper summarizes the experimental results for full-sized edge-slab–column connections reinforced with GFRP bars and stirrups. The effectiveness of the GFRP stirrups and their extension from the column face on the performance of the tested connections are examined. In addition, a nonlinear three-dimensional (3D) finite-element analysis (FEA) is used to perform an in-depth investigation. Then, a comprehensive parametric investigation is presented on edge connections with different stirrup sizes, extensions located at different distances from the column, and different spacings. The test results reveal that the presence of GFRP stirrups as a shear reinforcement in the slab around the column perimeter improved the punching-shear response. In addition, the FEA results are in good agreement with the experimental results in terms of ultimate load, cracking patterns, strains in the reinforcement and concrete, and load-deflection relationships, thereby confirming the accuracy of the finite-element model. The results confirm that the punching-shear resistance decreased with increasing stirrup spacing and increased with increasing stirrup size and extension from the column. Based on the numerical-simulation results, a simple design approach to predicate the ultimate capacity of the tested connections is proposed. The model yielded good yet conservative predictions with respect to the experimental results as well as the available results in the literature.
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      Effect of GFRP Shear Stirrups on Strength of Two-Way GFRP RC Edge Slabs: Experimental and Finite-Element Investigations

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    contributor authorAhmed E. Salama
    contributor authorMohamed Hassan
    contributor authorBrahim Benmokrane
    date accessioned2022-01-30T20:10:21Z
    date available2022-01-30T20:10:21Z
    date issued2020
    identifier other%28ASCE%29ST.1943-541X.0002593.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4266630
    description abstractGlass-fiber-reinforced-polymer (GFRP) reinforcing bars have recently gained wide acceptance as a viable construction material for sustainable new constructions. Yet current codes and guidelines have not addressed the design of GFRP-reinforced-concrete edge-slab–column connections with FRP stirrups as shear reinforcement. This paper summarizes the experimental results for full-sized edge-slab–column connections reinforced with GFRP bars and stirrups. The effectiveness of the GFRP stirrups and their extension from the column face on the performance of the tested connections are examined. In addition, a nonlinear three-dimensional (3D) finite-element analysis (FEA) is used to perform an in-depth investigation. Then, a comprehensive parametric investigation is presented on edge connections with different stirrup sizes, extensions located at different distances from the column, and different spacings. The test results reveal that the presence of GFRP stirrups as a shear reinforcement in the slab around the column perimeter improved the punching-shear response. In addition, the FEA results are in good agreement with the experimental results in terms of ultimate load, cracking patterns, strains in the reinforcement and concrete, and load-deflection relationships, thereby confirming the accuracy of the finite-element model. The results confirm that the punching-shear resistance decreased with increasing stirrup spacing and increased with increasing stirrup size and extension from the column. Based on the numerical-simulation results, a simple design approach to predicate the ultimate capacity of the tested connections is proposed. The model yielded good yet conservative predictions with respect to the experimental results as well as the available results in the literature.
    publisherASCE
    titleEffect of GFRP Shear Stirrups on Strength of Two-Way GFRP RC Edge Slabs: Experimental and Finite-Element Investigations
    typeJournal Paper
    journal volume146
    journal issue5
    journal titleJournal of Structural Engineering
    identifier doi10.1061/(ASCE)ST.1943-541X.0002593
    page04020056
    treeJournal of Structural Engineering:;2020:;Volume ( 146 ):;issue: 005
    contenttypeFulltext
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