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Indexed by:会议论文

Date of Publication:2016-06-29

Included Journals:EI

Volume:2224

Page Number:1038-1043

Abstract:Fiber reinforced polymer (FRP) has been widely employed in retrofitting concrete structures. Debonding of FRP from concrete is a typical failure mode in this technique. Fracture energy of interface is a key parameter governing the debonding behavior. Cohesive zone model (CZM) of fracture energy-based criteria is therefore an appropriate numerical approach to characterize the debonding behavior. This paper presents a simple but robust finite-element (FE) model with CZM for simulating the debonding procedure of CFRP from concrete induced by intermediate concrete(IC) crack. Parameters in CZM are determined by the related theories of concrete fracture mechanics and corresponding experiments. Based on the proposed FE model, the relationship of load to concrete crack mouth open displacements (CMOD), variations of stress in CFRP and concrete, as well as interfacial shear stress and slip in the case of different CMOD are identified, respectively. The peak points of load and debonding performance predicted by the presented FE model are well agreeable with the experimental results, which has verified the feasibility and precision of the proposed model for simulating interfacial debonding induced by IC crack of concrete beam.