混凝土材料组成非均匀性复合体的弹性模量数值预测

In this paper we consider concrete as a three-phase composite material consisting of aggregates, cement matrix and ITZ. Thus the macroscopic properties of concrete are depend on the area fractions, mechanical and physical properties, and interaction of the three phases in large part. Therefore, the study of the structural characteristics of ITZ and their effects on the elastic modulus of concrete is of theoretical and practical significance for further understanding the macroscopic behavior of concrete. Based on the basic theory of 4-node isoparametric element of finite element and combining homogenization theory, the elastic modulus is predicted through considering circular and polygonal aggregate which is compared with experimental results. An affirmative conclusion is that it’s closer to actual situation for polygonal aggregates than circular those.