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    Experimental Study on Wedge Anchorage Performance of Prestressed BFRP Laminates for Flexural Strengthening of Reinforced Concrete Components

    Source: Journal of Composites for Construction:;2023:;Volume ( 027 ):;issue: 005::page 04023043-1
    Author:
    Changyuan Liu
    ,
    Xin Wang
    ,
    Xinquan Chang
    ,
    Zhishen Wu
    ,
    Zhongguo Zhu
    ,
    Haitao Wang
    ,
    Zhining Bian
    DOI: 10.1061/JCCOF2.CCENG-4247
    Publisher: ASCE
    Abstract: This study investigated the anchoring effect of wedge anchorages on prestressed basalt fiber–reinforced polymer (BFRP) laminates. Compared with traditional carbon fiber–reinforced polymer (CFRP) laminates, BFRP laminates have a larger ultimate fracture strain, lower elastic modulus, and smaller prestress loss, making them cost-effective prestressed materials. Fifteen fiber-reinforced polymer (FRP) laminate–anchorage assemblies were prepared to investigate the effects of FRP type, anchorage type, mat type, and presetting load level on the static tensile behavior of FRP laminate–anchorage assemblies. The differences in the failure modes, load versus displacement (L–D) curves, and strain development of the FRP laminates were analyzed. The results demonstrated that, first, the anchorage efficiency of the CFRP laminate–anchorage assembly was higher than that of BFRP. Since the elastic modulus and transverse shear strength of the BFRP laminates were much lower than those of the CFRP laminates, the application of the traditional CFRP anchorage easily damaged the BFRP laminates. Therefore, a specific design and optimization are required for BFRP laminate anchorages. Second, an anchorage with a retracted stressing end wedge was prone to obtain higher normal stress and thus achieve a higher anchoring capacity. Third, the sandpaper mat improved the friction between the FRP laminate and wedges and alleviated the stress concentration phenomenon of the FRP laminate at the stressing end of the anchorage. Finally, an increased presetting load on the wedges could slightly improve the assemblies’ ultimate bearing capacity and stiffness; however, the enhanced presetting load aggravated the stress concentration phenomenon at the stressing end of the anchorage.
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      Experimental Study on Wedge Anchorage Performance of Prestressed BFRP Laminates for Flexural Strengthening of Reinforced Concrete Components

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4293398
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    contributor authorChangyuan Liu
    contributor authorXin Wang
    contributor authorXinquan Chang
    contributor authorZhishen Wu
    contributor authorZhongguo Zhu
    contributor authorHaitao Wang
    contributor authorZhining Bian
    date accessioned2023-11-27T23:13:53Z
    date available2023-11-27T23:13:53Z
    date issued10/1/2023 12:00:00 AM
    date issued2023-10-01
    identifier otherJCCOF2.CCENG-4247.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4293398
    description abstractThis study investigated the anchoring effect of wedge anchorages on prestressed basalt fiber–reinforced polymer (BFRP) laminates. Compared with traditional carbon fiber–reinforced polymer (CFRP) laminates, BFRP laminates have a larger ultimate fracture strain, lower elastic modulus, and smaller prestress loss, making them cost-effective prestressed materials. Fifteen fiber-reinforced polymer (FRP) laminate–anchorage assemblies were prepared to investigate the effects of FRP type, anchorage type, mat type, and presetting load level on the static tensile behavior of FRP laminate–anchorage assemblies. The differences in the failure modes, load versus displacement (L–D) curves, and strain development of the FRP laminates were analyzed. The results demonstrated that, first, the anchorage efficiency of the CFRP laminate–anchorage assembly was higher than that of BFRP. Since the elastic modulus and transverse shear strength of the BFRP laminates were much lower than those of the CFRP laminates, the application of the traditional CFRP anchorage easily damaged the BFRP laminates. Therefore, a specific design and optimization are required for BFRP laminate anchorages. Second, an anchorage with a retracted stressing end wedge was prone to obtain higher normal stress and thus achieve a higher anchoring capacity. Third, the sandpaper mat improved the friction between the FRP laminate and wedges and alleviated the stress concentration phenomenon of the FRP laminate at the stressing end of the anchorage. Finally, an increased presetting load on the wedges could slightly improve the assemblies’ ultimate bearing capacity and stiffness; however, the enhanced presetting load aggravated the stress concentration phenomenon at the stressing end of the anchorage.
    publisherASCE
    titleExperimental Study on Wedge Anchorage Performance of Prestressed BFRP Laminates for Flexural Strengthening of Reinforced Concrete Components
    typeJournal Article
    journal volume27
    journal issue5
    journal titleJournal of Composites for Construction
    identifier doi10.1061/JCCOF2.CCENG-4247
    journal fristpage04023043-1
    journal lastpage04023043-16
    page16
    treeJournal of Composites for Construction:;2023:;Volume ( 027 ):;issue: 005
    contenttypeFulltext
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