Numerical Analysis of Combined Aggregate Concrete from the Meso-Scale Level

In the paper , the combined aggregate concrete is regarded as a three-phase composite material based on the meso-scale level, it consists of lightweight aggregate, ordinary aggregate and mortar. According to Fuller’s grading curve, the number of aggregate with different size could be obtained. And the randomly aggregates model is generated base on the Monte Carlo method. APDL program is developed to generate finite element model of combined aggregate concrete, On the basis, the stress characteristics of combined aggregate concrete is studied.