Abstract
The shear behavior of the single-shear specimen with CFRP plate-ECC-concrete (CEC) composite interface was investigated using the finite element (FE) and theoretical calculation methods. The proposed FE model was established to simulate the entire loading process of the single-shear specimen under actual experimental conditions, and the newly developed CFRP-ECC interface model was incorporated. The FE model was calibrated and verified by comparing it with the experimental results. The results showed good agreement between the simulated and measured values for debonding load, shear stress, and interface damage. The proposed FE model was further adopted to perform parameter analyses of ECC thickness, CFRP bonding length, and CFRP plate width. This paper also proposed a calculation model for the debonding load of CEC composite interface considering the high tensile strength and the thickness of ECC. The results show that the proposed model shows a high accuracy for the prediction of debonding load.
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