基于均匀化理论的混凝土等效弹性模量的数值模拟  

Numerical Simulation of Equivalent Modulus of Concrete Based on Homogenization Theory

作　　者：闫晓鹏[1] 牛卫晶[1] 王志华[1] 马宏伟[2] 

机构地区：[1]太原理工大学应用力学研究所,太原030024 [2]暨南大学理工学院,广州510632

出　　处：《太原理工大学学报》2011年第2期212-214,共3页Journal of Taiyuan University of Technology

基　　金：太原理工大学科技发展基金项目(190-12901150)

摘　　要：在细观尺度上,混凝土可被视为由水泥砂浆基质、粗骨料和两者之间的黏结界面组成的三相复合材料。基于上述假设,根据均匀化理论,对胞元模型分别施加三种情况的边界条件和初始载荷,计算出了混凝土的等效弹性模量。结果表明,混凝土各相材料力学性能及体积分数的确定非常关键,尤其是界面相。由均匀化理论的有限元方法得到的数值计算结果与实验结果较为符合,能够准确地反映出周期性结构的宏观等效弹性性质。In the present paper, concrete is taken as a kind of three-phase composite material which is made up of sanded cement grout, coarse aggregate and the interface between them on the meso-scale. By applying three types of boundary condition and initial load to the cell structure, numerical simulation of equivalent elastic modulus of concrete based on homogenization theory is carried out. The results show the significance in determining the mechanical property of material in each phase and volume fraction, especially the interface phase. The numerical result is compared with experimental one and it is observed that both are in approximate agreement. The macro equivalent elastic property of periodic structure can be accurately exhibited by the equivalent elastic modulus of concrete obtained from the finite element method of homogenization.

关 键 词：混凝土 均匀化理论 有限元法 等效弹性模量 

分 类 号：O343.7[理学—固体力学]