Numerical Analysis of RC Beams Strengthened by Steel Plate-MPC Composite Technique

This paper proposes a technical solution for the reinforcement of reinforced concrete beam bridges with steel plate-MPC (modified polymer concrete) composite. MPC composite is a polyurethane-based high-strength lightweight material with good adhesion to concrete and steel, and has high tensile strength. Steel plates not only work together with MPC as the reinforcing material, but also serve as the molds of MPC pouring. The combined reinforcement of both can achieve the effect of rapid construction and improvement of bending bearing capacity. The finite element software ABAQUS is used to analyze the reinforced concrete rectangle beam strengthened by the steel plate-MPC composite strengthening. The parameters of steel plate thickness and MPC material usage are analyzed. The improvement of the bearing capacity and the failure mode of the main beam are analyzed. The research results can provide a new method for bridge reinforcement.