关键词: EPS混凝土;随机分布;冲击荷载;细观动力学;损伤分析

Abstract: It simulated the dynamic responses of EPS concrete models in impact loading that resembled with diverse proportions of EPS beads by FEM software based on random distribution of weibull in foundation of dynamical shocking experiments.According to the aspects of proportion of EPS beads, interfaces between EPS particle and cement, degree of damage and fracture rate, the diversities of failure situation and the dynamic properties of EPS concrete with EPS beads proportions were demonstrated.The study results showed that the deformation's capacities were improved overall, which made the failure styles evolved from quasi-brittleness to ductility and extrusion flow damage; and the values of damage degree magnified while the ultimate values of strain could be enhanced by several times; and the time of summit value for fracture rates was decreased by half-times and the curve of fracture rates was like hump with the increases of EPS beads proportion and the summation of interfaces between EPS beads and cement.

Key words: EPS concrete;random distribution;shock loading;meso-dynamics;damage estimation