Numerical Simulation Of Concrete Fracture On Mesolevel

In the paper, concrete is taken as three phases composites consisting of aggregate matrix and bond between matrix and aggregate on meso-level. Using Monte-Carlo method, the positions of the aggregate structures are generated. Mesh is projected on them, different material properties are assigned to the respective elements according to element location in individual phase.Whereas block element of Interface Element Method (IEM) could be arbitrary shape , the interfaces between block could describe the phenomenons of slip and crack, analysis of mesomechanics of concrete applying IEM is appropriate.The model and arithmetic of IEM is introduced in the paper. The strength and process of crack propagation for tensile compression and three-point-bend are simulated by numerical analysis.The purpose of the paper is to research the relation between meso-level structure and macromechanics characteristics of concrete and to popularize IEM, and to build a bridge between them.