混凝土劈裂抗拉力学性能的细观数值研究  

Numerical Study on Mechanical Performance of Concrete Split-tension on Meso-level

作　　者：屈彦玲[1] 

机构地区：[1]石家庄铁路职业技术学院土木系,河北石家庄050041

出　　处：《水利与建筑工程学报》2007年第4期17-18,25,共3页Journal of Water Resources and Architectural Engineering

基　　金：水利部水利技术开发基金资助(SJ9701)

摘　　要：采用随机骨料模型模拟混凝土的细观结构,在细观层次上将混凝土看成是由硬化水泥砂浆体、粗骨料颗粒及二者间的黏结带构成的三相非均质复合材料。利用有限元方法数值模拟混凝土试件的细观损伤断裂和劈裂抗拉,并对其劈裂抗拉破坏进行了研究。结果表明:骨料与砂浆的界面是混凝土劈裂抗拉破坏的薄弱环节,所采用的数值模拟计算方法基本可行。　The random aggregate model is used to simulate the structure of concrete,which is taken as the three-phase composites consisting of the hardening cement mortar matrix,aggregate and the bond between the matrix and aggregate on meso-level.The extension of cracks and the mechanical properties of concrete in split-tension test are simulated by using the finite element method.The split-tension strength of the concrete is studied also.The result indicates that the contact surface of the aggregate and mortar is the weak place of the split-tension strengh of the concrete and the applied numerical simulation is feasible basically.

关 键 词：劈裂抗拉强度 混凝土 随机骨料模型 数值模拟 

分 类 号：TU528.01[建筑科学—建筑技术科学]