NUMERICAL SIMULATION OF FRACTURING BEHAVIORS OF FRP-STRENGTHENED CONCRETE MEMBERS

Material Failure Process Analysis (MFPA) code is used to simulate the different types of debonding propagation along FRP-concrete interface and crack distribution in the concrete. It is found that the interfacial debonding may propagate either within the adhesive layer or through concrete layer in the vicinity of the bond interface. The simulation results agree well with the experiment observations. Properties of concrete and interfacial adhesive layer are considered to influence significantly the debonding propagation types and crack distribution. The authors mainly focus on the effects of concrete tensile strength and adhesive layer bond strength on the failure mode and structural load-carrying capacity of the concrete members.