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    Characterization and Design of Multilayer PBO FRCM Composite Reinforcements for Concrete Structures

    Source: Journal of Composites for Construction:;2021:;Volume ( 025 ):;issue: 006::page 04021048-1
    Author:
    Tommaso D’Antino
    ,
    Carlo Poggi
    DOI: 10.1061/(ASCE)CC.1943-5614.0001155
    Publisher: ASCE
    Abstract: Fiber-reinforced cementitious matrix (FRCM) composites can be preferred to other techniques to strengthen reinforced concrete (RC) members. Due to the limited cross-sectional area of textiles in FRCM, multilayer composites are often needed to provide adequate strength increase. Although multilayer FRCM composites have been already employed, quite limited research is available regarding the bond behavior of multilayer FRCM–concrete joints. Direct shear tests of FRCM–concrete joints and bending tests of FRCM-strengthened RC beams showed that when one or two textile layers are employed, debonding at the matrix–fiber interface generally occurs. When more than two layers are employed, detachment of the FRCM strip was observed in FRCM-strengthened RC beams, while limited studies of corresponding FRCM bond behavior were performed. The bond behavior of a multilayer bidirectional polyparaphenylene benzobisoxazole (PBO) FRCM composite applied onto a concrete substrate is investigated in this paper. Single-lap direct shear tests of PBO FRCM–concrete joints comprising two or four textile layers are performed, along with tensile tests of bare textile strips and single-layer FRCM coupons. Tests were conducted in both textile directions. The results obtained provide fundamental information on the effect of the textile direction and number of layers to be considered when designing the reinforcing system.
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      Characterization and Design of Multilayer PBO FRCM Composite Reinforcements for Concrete Structures

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4271771
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    contributor authorTommaso D’Antino
    contributor authorCarlo Poggi
    date accessioned2022-02-01T21:39:04Z
    date available2022-02-01T21:39:04Z
    date issued12/1/2021
    identifier other%28ASCE%29CC.1943-5614.0001155.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4271771
    description abstractFiber-reinforced cementitious matrix (FRCM) composites can be preferred to other techniques to strengthen reinforced concrete (RC) members. Due to the limited cross-sectional area of textiles in FRCM, multilayer composites are often needed to provide adequate strength increase. Although multilayer FRCM composites have been already employed, quite limited research is available regarding the bond behavior of multilayer FRCM–concrete joints. Direct shear tests of FRCM–concrete joints and bending tests of FRCM-strengthened RC beams showed that when one or two textile layers are employed, debonding at the matrix–fiber interface generally occurs. When more than two layers are employed, detachment of the FRCM strip was observed in FRCM-strengthened RC beams, while limited studies of corresponding FRCM bond behavior were performed. The bond behavior of a multilayer bidirectional polyparaphenylene benzobisoxazole (PBO) FRCM composite applied onto a concrete substrate is investigated in this paper. Single-lap direct shear tests of PBO FRCM–concrete joints comprising two or four textile layers are performed, along with tensile tests of bare textile strips and single-layer FRCM coupons. Tests were conducted in both textile directions. The results obtained provide fundamental information on the effect of the textile direction and number of layers to be considered when designing the reinforcing system.
    publisherASCE
    titleCharacterization and Design of Multilayer PBO FRCM Composite Reinforcements for Concrete Structures
    typeJournal Paper
    journal volume25
    journal issue6
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0001155
    journal fristpage04021048-1
    journal lastpage04021048-13
    page13
    treeJournal of Composites for Construction:;2021:;Volume ( 025 ):;issue: 006
    contenttypeFulltext
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