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工程力学  2014 

混凝土单轴抗压强度三维细观数值仿真

DOI: 10.6052/j.issn.1000-4750.2012.10.0768, PP. 39-44

Keywords: 混凝土,初始缺陷,界面弹簧元模型,单轴抗压强度,数值仿真

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Abstract:

该文在细观层面上将混凝土看作粗骨料、砂浆、界面、初始缺陷组成的四相复合材料,给出了三维随机缺陷界面弹簧元模型模拟混凝土单轴抗压强度的数值方法。讨论了初始缺陷含量及其分布的确定方法以及界面细观计算参数的取值范围。数值模拟结果表明:混凝土的抗压强度随着初始缺陷含量的增加有大幅度降低;当界面初始缺陷含量为30%时,混凝土抗压强度的计算值与试验值吻合较好。

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