砌体RVE均质过程的有限元分析

Finite Element Analysis of Masonry RVE Homogenization Procedure

均质化是以连续介质力学为基础的砌体结构数值分析中最重要的一步 ,形成可以等效砌体组成材料的砌体代表性体积单元 (RepresentativeVolumeElement,简称RVE)又是均质化过程中的关键步骤。RVE是通过分别考虑砌块和砂浆的材料特性和相互作用建立起来的力学模型 ,本文采用有限元分析程序ANSYS对RVE进行模拟 ,分析了它在几种不同的加载条件下的应力应变关系 ,计算了它的等效弹性模量和泊松比 。

Homogenization is one of the most important steps in the numerical analysis of masonry structure, where the continuum is used. A masonry representative volume element (RVE) is formed as the equivalent element of masonry components and it is the most important step in homogenization procedure. The RVE is molded with consideration of the material properties of mortar and brick as well as their interaction separately. In this paper the masonry RVE is simulated with the finite element software ANSYS. The stress-strain relationships of RVE subjected to different types of loading conditions are presented. The equivalent elastic modulus and Poisson's ratio are calculated and the feasibility of finite element method used in the procedure of masonry homogenization is demonstrated.