Papers by Author: Hai Feng Liu

Abstract: With the wide application of high-strength concrete and thin-wall steel tube in concrete-filled steel tube, it is essential to study the post-local buckling behavior of rectangle steel plates. Based on large deflection theory of plate, the post-local buckling behavior of steel plates in concrete-filled steel tube is analyzed in this paper. At the same time, the post-local stress of steel plates is obtained. The results indicate that the post-local buckling behavior of steel plates can be effectively utilized in large width-to-thickness ratios of steel plates.

Abstract: The dynamic compression experiments of reinforced concrete are carried out by one-stage light gas gun apparatus which subjects the reinforced concrete to deformation at strain rates of the order of 104/s with confining pressures of 1~1.5GPa. The stress-strain curves of reinforced concrete with different impact velocities are obtained using Lagrangian analysis method. Experimental results indicate that reinforced concrete is non-linear, rate-sensitive and pressure-dependent.