中南大学学报（自然科学版）2011，Vol.42Issue(2)：463-469,7.
混凝土损伤断裂的三维细观数值模拟
3-D mesoscopic numerical simulation of concrete damage and fracture
摘要
Abstract
On the meso-level, a method for establishing 3-D numerical model with random distribution of aggregate location and mechanical parameters was put forward. Based on damage mechanics and computational mechanics, two groups of numerical models of wet-screened concrete cube specimens were established with ANSYS software, i.e., the first group of models was designed to simulate three kinds of aggregate random distribution with the same gradation, and the second group of models was designed to simulate the random distribution of main material parameters of phases that composed concrete. By the numerical axial compression simulation of the two groups of models, the gradual process of damage crack appearance and the growth of concrete were revealed. The results show that the cubic compressive strength of concrete by numerical simulation approximates to that by physical test. The random distributing of aggregate location has influence on the generating location and expanding paths of crack, yet it has slight influence on the carrying capacity of samples. The material parameters heterogeneity of phases, which can be characterized well by Weibull distribution,reduces the carrying capacity of specimens.关键词
混凝土/损伤断裂/随机骨料/随机力学参数/细观数值模型分类
建筑与水利引用本文复制引用
李朝红,王海龙,徐光兴..混凝土损伤断裂的三维细观数值模拟[J].中南大学学报（自然科学版）,2011,42(2):463-469,7.基金项目
国家科技支撑计划项目(2006BAJ15803-01) （2006BAJ15803-01）
石家庄铁道大学科研专项基金资助项目(2010Q18) （2010Q18）
