基于细观物理机制的混凝土损伤数值仿真  

Meso-mechanism Based Simulation of Concrete Damage Process

作　　者：邬翔[1] 李杰[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《建筑材料学报》2009年第3期259-265,共7页Journal of Building Materials

基　　金：国家自然科学基金委创新研究群体资助项目(50321803)

摘　　要：首先利用数字图像处理技术生成能反映混凝土真实结构的数值试件,然后从细观角度将混凝土分为三相:骨料、硬化水泥浆体及其界面.根据界面区的细/亚细观物理结构,提出了一类界面过渡区简化模型.对其余两相材料,分别建立了不同的细观单元本构关系及损伤破坏准则.由此,建立了基于细观物理机制的混凝土损伤数值仿真模型.数值仿真结果与真实试验结果比较表明,该方法可以成为一种较可靠的细观损伤数值仿真途径.At first, a numerical model using digital image process technique was built. Then, the concrete was divided into three phases： aggregate, hardened mortar and ITZ（interfacial transition zone）. According to three kinds of meso/sub-meso physical structures, different meso-constitutive relations have been proposed. Finally, by comparing numerical and real test results, it is easily found that this method can build a more reliably meso damage numerical model than ever.

关 键 词：细观损伤 数值模型 混凝土 仿真 

分 类 号：TU528.01[建筑科学—建筑技术科学]