不同损伤模型下的混凝土拉伸力学性能分析

Analysis on tensile mechanical property of concrete under various damage models

采用双折线模型、Mazars模型和Lemaitre模型三种损伤模型来计算二级配混凝土的拉伸强度,研究混凝土立方体的力学性能以及混凝土立方体的破坏过程,同时利用计算出的应力应变数据绘制应力～应变曲线,从而得出单轴荷载作用下混凝土试件的破坏规律,分析结果表明,采用前两个损伤模型来研究混凝土的力学性能是可行的。

The tensile strength of the two-graded concrete is calculated with tile double-broken line model, Mazars model and Lemaitre model for studying the mechanical properties of concrete cube and its failure process, meanwhile, the relevant stress strain curve is plotted with the calculated data of stress-strain, and then the failure law of the concrete specimen under uniaxial loading is obtained. The analysis demonstrates that it is feasible to study the mechanical properties of concrete with the first two damage model mentioned above.