Heterogeneous model for concrete under blast loading

摘要

A heterogeneous strength model for concrete material under blast loading has been developed in the present study. In the strength model, the concrete material is assumed consisting of two phases, that is, high strength coarse aggregate and lower strength cement paste, randomly distributed in the structure components. For both aggregate and cement paste, stochastic strength are considered. With the suggested strength criterion a dynamic damage model for concrete is developed. As a numerical example, the dynamic damage process of a concrete slab under blast loads is analyzed.