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    Experimental Investigation on Bond Behavior of Cement-Matrix–Based Composites for Strengthening of Masonry Structures

    Source: Journal of Composites for Construction:;2016:;Volume ( 020 ):;issue: 001
    Author:
    Valerio Alecci
    ,
    Mario De Stefano
    ,
    Raimondo Luciano
    ,
    Luisa Rovero
    ,
    Gianfranco Stipo
    DOI: 10.1061/(ASCE)CC.1943-5614.0000598
    Publisher: American Society of Civil Engineers
    Abstract: Fabric-reinforced cementitious matrices have raised a great interest for the external strengthening of historical masonries, representing a valid alternative to fiber-reinforced polymers. As the effectiveness of an external reinforcement firstly depends on the bond performance, this paper presents an experimental investigation, through double-shear tests, on the bond behavior of cement-matrix-based composites reinforced with three different textiles, namely, carbon, polybenzoxazole (PBO), and glass. Textiles and matrix specimens were experimentally tested to correlate mechanical properties of the constituent materials with the global response of the composites. The results of bond tests highlighted that PBO-fiber- and glass-fiber-based composites better exploit the mechanical properties of the textile. Observation of the failure mechanisms highlighted that debonding phenomena occur at the fiber–matrix interface. Furthermore, the effective anchorage lengths were estimated. The values of fracture energy were determined by a fracture-mechanics approach, using the experimental values of debonding loads. Finally, the values of fracture energy were correlated with the mechanical characteristics of the constituent materials.
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      Experimental Investigation on Bond Behavior of Cement-Matrix–Based Composites for Strengthening of Masonry Structures

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    http://yetl.yabesh.ir/yetl1/handle/yetl/81270
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    contributor authorValerio Alecci
    contributor authorMario De Stefano
    contributor authorRaimondo Luciano
    contributor authorLuisa Rovero
    contributor authorGianfranco Stipo
    date accessioned2017-05-08T22:28:41Z
    date available2017-05-08T22:28:41Z
    date copyrightFebruary 2016
    date issued2016
    identifier other46303648.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/81270
    description abstractFabric-reinforced cementitious matrices have raised a great interest for the external strengthening of historical masonries, representing a valid alternative to fiber-reinforced polymers. As the effectiveness of an external reinforcement firstly depends on the bond performance, this paper presents an experimental investigation, through double-shear tests, on the bond behavior of cement-matrix-based composites reinforced with three different textiles, namely, carbon, polybenzoxazole (PBO), and glass. Textiles and matrix specimens were experimentally tested to correlate mechanical properties of the constituent materials with the global response of the composites. The results of bond tests highlighted that PBO-fiber- and glass-fiber-based composites better exploit the mechanical properties of the textile. Observation of the failure mechanisms highlighted that debonding phenomena occur at the fiber–matrix interface. Furthermore, the effective anchorage lengths were estimated. The values of fracture energy were determined by a fracture-mechanics approach, using the experimental values of debonding loads. Finally, the values of fracture energy were correlated with the mechanical characteristics of the constituent materials.
    publisherAmerican Society of Civil Engineers
    titleExperimental Investigation on Bond Behavior of Cement-Matrix–Based Composites for Strengthening of Masonry Structures
    typeJournal Paper
    journal volume20
    journal issue1
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0000598
    treeJournal of Composites for Construction:;2016:;Volume ( 020 ):;issue: 001
    contenttypeFulltext
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