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    Shear Transfer Mechanism of Concrete Strengthened with External CFRP Strips

    Source: Journal of Composites for Construction:;2017:;Volume ( 021 ):;issue: 002
    Author:
    Feng Lin
    ,
    Jiayao Hua
    ,
    Yu Dong
    DOI: 10.1061/(ASCE)CC.1943-5614.0000751
    Publisher: American Society of Civil Engineers
    Abstract: Concrete with reinforcing steel bars across a shear plane was strengthened using carbon fiber–reinforced polymer (CFRP) strips externally bonded to resist shear transfer. Specimens were designed and tested to give insight on shear transfer based on a component model. In this model, five components, i.e., the friction, aggregate interlock, adhesion, shear dilation, and dowel action, contributed to the overall shear resistance. Results indicated that the ultimate shear transfer capacities improved by 6 to 50% for specimens with steel reinforcement ratios varying from 0.46 to 1.20% and CFRP reinforcement ratios varying from 0.224 to 0.298%. The mechanism of shear resistance increase was due to the additional clamping force provided by CFRP strips, which led to a significant increase in the shear component of the adhesion. A best-fitting expression was presented to predict the ultimate shear transfer capacities of CFRP-strengthened concrete with satisfactory accuracy by comparing the calculated results with test data in this study and in literature. A general concept of equivalent reinforcement ratio was proposed to clarify the limitation of strengthening effect for shear transfer.
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      Shear Transfer Mechanism of Concrete Strengthened with External CFRP Strips

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4241645
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    contributor authorFeng Lin
    contributor authorJiayao Hua
    contributor authorYu Dong
    date accessioned2017-12-16T09:20:46Z
    date available2017-12-16T09:20:46Z
    date issued2017
    identifier other%28ASCE%29CC.1943-5614.0000751.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4241645
    description abstractConcrete with reinforcing steel bars across a shear plane was strengthened using carbon fiber–reinforced polymer (CFRP) strips externally bonded to resist shear transfer. Specimens were designed and tested to give insight on shear transfer based on a component model. In this model, five components, i.e., the friction, aggregate interlock, adhesion, shear dilation, and dowel action, contributed to the overall shear resistance. Results indicated that the ultimate shear transfer capacities improved by 6 to 50% for specimens with steel reinforcement ratios varying from 0.46 to 1.20% and CFRP reinforcement ratios varying from 0.224 to 0.298%. The mechanism of shear resistance increase was due to the additional clamping force provided by CFRP strips, which led to a significant increase in the shear component of the adhesion. A best-fitting expression was presented to predict the ultimate shear transfer capacities of CFRP-strengthened concrete with satisfactory accuracy by comparing the calculated results with test data in this study and in literature. A general concept of equivalent reinforcement ratio was proposed to clarify the limitation of strengthening effect for shear transfer.
    publisherAmerican Society of Civil Engineers
    titleShear Transfer Mechanism of Concrete Strengthened with External CFRP Strips
    typeJournal Paper
    journal volume21
    journal issue2
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0000751
    treeJournal of Composites for Construction:;2017:;Volume ( 021 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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