Experimental Study and Numerical Simulation for the Anti-explosion Performance of Steel Plate-Reinforced Concrete Composite Beam

In order to identify the anti-explosion performance of Steel Plate-Reinforced Concrete Composite (SPRCC) beam under contact explosion, the explosion experiments of simply supported SPRCC beams were conducted. Simulation of the experiments was also carried out. Based on the platform of the commercial hydrocode AUTODYN, a three-dimensional solid model was established containing the explosive, the air and the steel plate-RC beam consisting of the concrete, the reinforcement and the steel plate. To simulate the dynamic response of the SPRCC beam, appropriate contact model at the fluid-solid interface was used. The simulation results agreed well with the experiments. Damage mechanisms and damage modes of the SPRCC beam under different explosive charge were studied by the validated modelling. With the increase of the explosive charge, the damage mode of the SPRCC beam gradually changed from the local flexure failure to the failure coupling of local punching and flexure. As a result of this study, the SPRCC beams have good anti-explosion performance, due to the constraints of the steel plate.