基于渐变网格剖分方法的混凝土细观数值模拟  

Micro-numerical Simulation of Concrete Based on Gradually Mesh Generation Method

作　　者：肖建强[1,2] 夏晓舟[2,3] 

机构地区：[1]南京工程学院建筑工程学院,江苏南京211167 [2]河海大学工程力学系,江苏南京210098 [3]广东工业大学建筑与城市规划学院,广东广州510006

出　　处：《南京工程学院学报（自然科学版）》2009年第2期29-33,共5页Journal of Nanjing Institute of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助资助项目(50679022);南京工程学院科研基金项目(KXJ07018)

摘　　要：在细观层次上,把混凝土看作是由水泥砂浆、骨料及二者之间的界面组成的复合材料,通过渐变网格剖分的方法先后对随机投放的骨料、界面和水泥砂浆进行网格剖分,删除多余节点,重新排列节点顺序,建成三维随机骨料分布的细观有限元数值模型.用细观有限元模型分别进行混凝土的单轴拉伸和不同围压下的假三轴数值试验,分析不同加载形式对混凝土试件破坏形式以及承载能力的影响.From micro perspective, concrete is viewed as a composite consisting of mortar matrix, aggregates and interface layer between matrix and aggregate. By using gradually mesh generation method, the random distributed aggregates, interfaces and matrix were meshed and redundant nodes were deleted and then renumbered, for the purpose of establishing a three-dimension meso-numerical model with random distribution of aggregates. The new model was then employed to test the uniaxial tensile of concrete and to carry out numerical experiments of pseudo triaxial under different confining pressures. The effects of different loading forms on concrete specimen failures and on carrying capacity were examined as well.

关 键 词：随机骨料分布 渐变网格剖分 三维细观数值模型 数值试验 

分 类 号：TU528.1[建筑科学—建筑技术科学]