基于粘结裂缝模型的混凝土细观力学特性模拟  

Meso-mechanical Simulation of Concrete Based on Cohesive Crack Model

作　　者：柳波[1] 殷德胜[1,2] 陈博夫 刘思洋[1] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]三峡地区地质灾害与生态环境湖北省协同创新中心,湖北宜昌443002

出　　处：《水电能源科学》2015年第5期101-104,共4页Water Resources and Power

摘　　要：混凝土细观力学特性的数值模拟,很大程度上取决于骨料模型和混凝土裂缝模型的选择是否合理、有效。为此,首先利用块体切割法生成混凝土随机多边形骨料模型;然后对骨料模型划分网格,并通过粘结单元嵌入算法实现了砂浆之间、骨料与砂浆单元间零厚度粘结单元的插入;最后利用Abaqus软件进行了混凝土试件的单轴拉伸数值模拟。结果表明,模拟得到的混凝土抗拉强度值与试验值吻合较好,可见该方法能较好地研究混凝土的力学性能。The numerical simulation of concrete meso-mechanical analysis is mostly dependent on whether the con- crete aggregate model and the crack model are reasonable or not. In this paper, three steps are introduced for the numeri- cal simulation. Firstly, the block cutting method is used to generate the random aggregate model of concrete. Then the aggregate model is divided into mesh and an algorithm is used to insert the cohesive element into the inter{aces of mortar mortar and aggregate-mortar. Finally, numerical simulation of concrete uniaxial tensile is carried out by the software Abaqus. The results show that the numerical simulation of concrete tensile strength accords with the experimental re- sults. So, the proposed method can be applied to study the mechanical properties of the concrete.

关 键 词：随机骨料 粘结单元 细观力学 单轴拉伸 

分 类 号：TU528[建筑科学—建筑技术科学]