MONTE CARLO SIMULATIONS ON MESO-SCALE HETEROGENEITY OF CONCRETE BY A DAMAGE MODEL

Abstract

Monte Calro simulations are carried out to numerically investigate the heterogeneity of concrete in meso-scale. The concrete is regarded as three-phase composite materials composed of mortar, coarse-aggregates, and the interface. A damage model that allows a kind of mesh-free nite element analysis for heterogeneous materials is applied for modeling cohesive crack growth. After presenting the formulation of the damage model, the numerical results are compared with experimental results to verify the applicability of the damage model to the simulation of cohesive crack growth in concrete. Monte Calro simulations are then performed to investigate the inuence of the heterogeneity with respect to the grain size of coarse aggregates in concrete's meso-scale on the fracture properties.