Bond Behavior of Steel-Recycled Aggregate Concrete Interface After High Temperatures and Spraying Water Cooling

Using recycled aggregate concrete (RAC) in steel-reinforced structure is an effective way to eliminate the adverse effects of aggregate, which has excellent application prospect. Fire a great destructiveness (SRRAC) structure; hence, bond performance SRRAC after high temperature, as prerequisite for composite between steel and RAC, key problem structural safety corresponding assessment fire. In this article, residual behaviors steel-recycled interface different temperatures spraying water cooling were studied through push-out test. The failure modes load–slip curves examined. ultimate strength, elastic shear stiffness specimens temperature regime evaluated compared that natural air. A parametric analysis replacement percentage, studs was conducted. calculation approach strength developed based on sensitive gray system theory regression analysis. Results showed properties decreased exposure increased. more significant influence than with both flange web have highest temperature. all factors, number largest relational degree SRRAC. provided reliable prediction