EXPERIMENTAL STUDY OF BOND-SLIP PERFORMANCE BETWEEN STEEL AND CONCRETE IN SRC STRUCTURES

Based on the experimental study of the bond-slip behavior between steel and concrete in SRC structures, the bond-slip mechanism between steel and concrete is analyzed and several important parameters are discussed. The distribution mode of bond stress and slip along the embedment length of steel and concrete interface, as well as the bond-slip relationship between the bond force and slip are also studied, and their equations are provided. The calculating method of bond strength, slip value and bond failure load are presented. Good agreement with the experimental results is reached. According to the punching failure principle of concrete slab, a determining method for critical thickness of concrete cover is proposed. The present results are believed to be useful for further study of bond-slip relationship and bond failure criterion between steel and concrete as well as the improvement of calculating theory of strength, stiffness, deformation, crack width and finite element analysis of SRC structures.