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    Tests on RC Beams Strengthened at the Span with Externally Bonded Polymers Reinforced with Carbon or Steel Fibers

    Source: Journal of Composites for Construction:;2012:;Volume ( 016 ):;issue: 005
    Author:
    George J. Mitolidis
    ,
    Thomas N. Salonikios
    ,
    Andreas J. Kappos
    DOI: 10.1061/(ASCE)CC.1943-5614.0000281
    Publisher: American Society of Civil Engineers
    Abstract: The main objective of the experimental work reported herein is the comparative evaluation of steel-reinforced polymers (SRPs) and carbon-reinforced polymers (CFRPs) used as externally-bonded reinforcement in strengthening of reinforced-concrete (RC) members. Tensile stress strain as well as bond constitutive laws for these materials were first derived from 16 tests and are summarized here. Results are then reported from four-point bending tests of five full-scale RC beams strengthened at their span using SRP and CFRP strips. The bond tests have shown that by providing a bond length greater than the effective one, neither the bond strength nor the deformation capacity are increased, whereas by increasing the width of the strip the bond strength is increased. From the bending tests of beams it was found that the use of both SRP and CFRP strips resulted in a significant increase in strength (up to 92%) with respect to the strength of the initial specimen. The experimentally measured strengths were estimated analytically using both the experimental measurements of the specimen deformations and the pertinent provisions of standards from the American Concrete Institute and the European Committee for Standardization.
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      Tests on RC Beams Strengthened at the Span with Externally Bonded Polymers Reinforced with Carbon or Steel Fibers

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    http://yetl.yabesh.ir/yetl1/handle/yetl/57415
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    contributor authorGeorge J. Mitolidis
    contributor authorThomas N. Salonikios
    contributor authorAndreas J. Kappos
    date accessioned2017-05-08T21:36:33Z
    date available2017-05-08T21:36:33Z
    date copyrightOctober 2012
    date issued2012
    identifier other%28asce%29cc%2E1943-5614%2E0000284.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/57415
    description abstractThe main objective of the experimental work reported herein is the comparative evaluation of steel-reinforced polymers (SRPs) and carbon-reinforced polymers (CFRPs) used as externally-bonded reinforcement in strengthening of reinforced-concrete (RC) members. Tensile stress strain as well as bond constitutive laws for these materials were first derived from 16 tests and are summarized here. Results are then reported from four-point bending tests of five full-scale RC beams strengthened at their span using SRP and CFRP strips. The bond tests have shown that by providing a bond length greater than the effective one, neither the bond strength nor the deformation capacity are increased, whereas by increasing the width of the strip the bond strength is increased. From the bending tests of beams it was found that the use of both SRP and CFRP strips resulted in a significant increase in strength (up to 92%) with respect to the strength of the initial specimen. The experimentally measured strengths were estimated analytically using both the experimental measurements of the specimen deformations and the pertinent provisions of standards from the American Concrete Institute and the European Committee for Standardization.
    publisherAmerican Society of Civil Engineers
    titleTests on RC Beams Strengthened at the Span with Externally Bonded Polymers Reinforced with Carbon or Steel Fibers
    typeJournal Paper
    journal volume16
    journal issue5
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0000281
    treeJournal of Composites for Construction:;2012:;Volume ( 016 ):;issue: 005
    contenttypeFulltext
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