Abstract:In order to solve the construction problems such as the mutual interference between shape steel and reinforcement bars and the difficulty of concrete pouring, the steel cages in the steel reinforced concrete structure were all replaced with steel fibers to form the steel fiber reinforced concrete composite structure without reinforcement bars. 16 specimens were designed and tested by push out testing. The bonding properties and full process of interface damage between shape steel and steel fiber reinforced concrete were studied without steel reinforcement cage. The results show that: the loading end and the free end of the shape steel and steel fiber reinforced concrete are not synchronous, and the bonding force between the shape steel and steel fiber reinforced concrete is not balanced; the nominal bonding strength inereases with the increase of the thickness of protective layer of steel fiber reinforced concrete and decreases regularly with the increase of the bonding interface length; the larger the thickness of protective layer is, the longer the bonding interface length, and the slower the interface damage develops in the middle and late stages of the test.