Abstract：An innovative method is proposed to replace the steel reinforcement cage by steel fiber to form a shape steel and steel fiber reinforced concrete to solve the construction problems of steel reinforced concrete structure, such as position conflict between shape steel and steel bars, or difficulty of concrete placement. The bond behavior between the shape steel and steel fiber reinforced concrete is the foundation to ensure the cooperation of two materials. 8 circular specimens and 8 square specimens were designed and experimented by push-out testing to investigate the bonding properties between shape steel and steel fiber reinforced concrete without steel reinforcement cage. Some important performance indexes, including load-slip curve, bond strength and interfacial energy were obtained. The load-slip curves of the loading end and the free end show obvious differences, which are most obvious when the load reaches the peak load-bearing capacity. In addition, circular specimens show better interfacial bonding effect than the square specimens. The maximum nominal bonding strength of the circular specimen reaches 1.913MPa and the maximum residual bond strength is 0.707MPa, while the corresponding values for the square specimen are 1.496MPa and 0.609MPa respectively. The larger the thickness of concrete protective layer and bond length, the more viscoelastic deformation energy can be stored at the interface during the stress process.
