Abstract
AbstractIn this paper, the bond slip between the composite reinforcement layer and concrete is studied by single shear test. The composite reinforcement layer contains the CFRP (Carbon Fiber Reinforced Polymer) grid embedded within ECC (Engineering cementitious composites) matrix. Considering the influence of bond length, matrix type and ECC strength, the failure mode of the interface and the effect of various factors are clarified through the discussion of the experimental phenomenon, load slip relationship and bond slip relationship. The result indicated that the effective bond length increases with the decrease of ECC matrix strength, when the effective bond length exceeds 550 mm or the ECC matrix strength is greater than E40, the failure load can be increased. In comparison with mortar composite layer, ECC composite layer tends to be relatively ductile. Finally, two of existing FRP-concrete interface models were selected to fit the experimental curve, and the fitting effect of existing FRP-concrete interface models is acceptable.KeywordsInterfaceECCFRPConcreteBond behaviorSingle shear test
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