DEBONDING PREDICTION OF CARBON FIBER REINFORCED POLYMER BONDED STEEL BEAMS

The prediction of static debonding behavior and bond failure load of carbon fiber reinforced polymer (CFRP) bonded steel beams is presented in this paper. Full-scale experiments on CFRP bonded steel beams under four-point bending were first carried out. The effects of different strengthening parameters including laminate thickness, bond length and adhesive thickness on the bond strength were investigated experimentally. Finite element analyses (FEA) were then conducted on the CFRP bonded steel beams. By incorporating the proposed debonding model into the FEA, the debonding behavior of the composite beam was simulated. The validity of the debonding modeling was assessed by comparing the numerical debonding strengths against the experimental results. The advantages of this model were proven by comparing its results against those predicted by the maximum value based model.