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    Fatigue Behavior of Basalt Fiber-Reinforced Polymer Tendons for Prestressing Applications

    Source: Journal of Composites for Construction:;2016:;Volume ( 020 ):;issue: 003
    Author:
    Xin Wang
    ,
    Jianzhe Shi
    ,
    Zhishen Wu
    ,
    Zhongguo Zhu
    DOI: 10.1061/(ASCE)CC.1943-5614.0000649
    Publisher: American Society of Civil Engineers
    Abstract: This paper studies the fatigue behavior of high-strength basalt fiber-reinforced polymer (BFRP) tendons for potential applications in prestressed structures. An effective anchoring method of winding fiber sheets was first developed for fatigue testing of BFRP tendons to avoid premature failure at the anchorage. The fatigue stress ranges from 0.05 to 0.14fu (fu = ultimate tensile strength) and maximum stresses from 0.6 to 0.8fu were determined, whereas the elastic modulus of BFRP tendons during the fatigue tests was measured. The fatigue failure mechanism was analyzed and elaborated at both the macro- and microscopic levels. The appropriate fatigue stress range and maximum stress level were predicted from both experimental fitting and reliability analysis. The results show that the fatigue failure of a BFRP tendon is mainly induced by the debonding among fiber-matrix interfaces at the outer layer of the tendon. The fatigue stress range greatly affects the fatigue life of BFRP tendons. The BFRP tendons can sustain 2 million cyclic loadings under a stress range of 0.05fu (85 MPa) and maximum stress of 0.6fu (1,018 MPa). Furthermore, the elastic modulus of BFRP tendons before failure remains constant regardless of the number of cycles. Prediction of fatigue strength (limit of stress range and maximum stress to sustain 2 million cyclic loadings) based on experimental fitting shows a satisfactory consistency with the previously mentioned experimental results (0.05 and 0.6fu). A recommendation of a stress range of 0.04fu (68 MPa) and maximum stress of 0.53fu (899 MPa) are proposed with 95% reliability for BFRP tendons in prestressing applications.
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      Fatigue Behavior of Basalt Fiber-Reinforced Polymer Tendons for Prestressing Applications

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4241690
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    contributor authorXin Wang
    contributor authorJianzhe Shi
    contributor authorZhishen Wu
    contributor authorZhongguo Zhu
    date accessioned2017-12-16T09:21:06Z
    date available2017-12-16T09:21:06Z
    date issued2016
    identifier other%28ASCE%29CC.1943-5614.0000649.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4241690
    description abstractThis paper studies the fatigue behavior of high-strength basalt fiber-reinforced polymer (BFRP) tendons for potential applications in prestressed structures. An effective anchoring method of winding fiber sheets was first developed for fatigue testing of BFRP tendons to avoid premature failure at the anchorage. The fatigue stress ranges from 0.05 to 0.14fu (fu = ultimate tensile strength) and maximum stresses from 0.6 to 0.8fu were determined, whereas the elastic modulus of BFRP tendons during the fatigue tests was measured. The fatigue failure mechanism was analyzed and elaborated at both the macro- and microscopic levels. The appropriate fatigue stress range and maximum stress level were predicted from both experimental fitting and reliability analysis. The results show that the fatigue failure of a BFRP tendon is mainly induced by the debonding among fiber-matrix interfaces at the outer layer of the tendon. The fatigue stress range greatly affects the fatigue life of BFRP tendons. The BFRP tendons can sustain 2 million cyclic loadings under a stress range of 0.05fu (85 MPa) and maximum stress of 0.6fu (1,018 MPa). Furthermore, the elastic modulus of BFRP tendons before failure remains constant regardless of the number of cycles. Prediction of fatigue strength (limit of stress range and maximum stress to sustain 2 million cyclic loadings) based on experimental fitting shows a satisfactory consistency with the previously mentioned experimental results (0.05 and 0.6fu). A recommendation of a stress range of 0.04fu (68 MPa) and maximum stress of 0.53fu (899 MPa) are proposed with 95% reliability for BFRP tendons in prestressing applications.
    publisherAmerican Society of Civil Engineers
    titleFatigue Behavior of Basalt Fiber-Reinforced Polymer Tendons for Prestressing Applications
    typeJournal Paper
    journal volume20
    journal issue3
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0000649
    treeJournal of Composites for Construction:;2016:;Volume ( 020 ):;issue: 003
    contenttypeFulltext
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