Approach to generation of random convex polyhedral aggregate model and plotting for concrete meso-mechanics

Abstract

The mechanical behavior of concrete is directly related to its gradation and aggregate content.An appropriate random aggregate model is the basis for successfully simulating the meso-mechanical behaviors of concrete.A method for simulating full-graded aggregate concrete with high aggregate content,which can efficiently pack the spherical aggregates,is proposed.Based on this model,a 3-D random convex polyhedron aggregate model considering the actual aggregate content,gradation and shape of aggregate is established.Furthermore,the method for identifying the properties of the meso-elements is investigated and the meshing codes are designed to automatically generate the meso-scale structured grids of concrete.