Generalization of the interface law for different FRP processing techniques in FRP-to-concrete bonded interfaces

Recent trends in the application of advanced processing techniques, such as vacuum assisted resin infusion (VARI) or heated vacuum bag only (HVBO), compel generalization of the bond-slip laws for prediction of the interface behaviour in adhesively bonded joints. In this research, a new analytical approach is presented to determine the interface behaviour. Since the model is developed solely based on boundary conditions, it can be applied to any types of the FRP processing technique. With this method, the interface characteristics can be obtained from the applied load at each stage and the properties of the materials. Comparisons between experimental and analytical results of strain, shear stress and slip profiles indicate that the proposed analytical model is capable of predicting the interfacial behaviour between FRP-to-concrete bonded joints manufactured with different the FRP processing techniques (FPTs).