Mechanical Behavior of Concrete Under Dynamic Loadings

To research the mechanical belavior of concret under dynamic loadings, the mechanical behavior and the failure modes of concrete under quasi-static or dynamic compressive loadings were investigated by a two-dimensional finite element model which was established by a self-developed program. Random distribution of coarse aggregate in concrete was obtained by using this program. In the developed program, concrete was regarded as a two-phase composite material of cement mortar and coarse aggregate. The effectiveness of established finite element model was verified by comparing of numerical predictions with experimental results. Then, the effects of coarse aggregate size distribution and coarse aggregate volume fraction on the mechanical behavior and failure modes of concrete under dynamic loadings were analyzed. The results of this research could provide a basis for the structural optimization and design of concrete.