混凝土圆柱体试件劈拉性能数值模拟

Numerical Simulation of Split-tension Performance of Concrete Cylinder Specimens

为从细观层次上研究混凝土的劈拉力学性能,运用不同的三维随机骨料模型模拟混凝土中粗骨料,利用非线性有限元方法对混凝土劈拉细观损伤断裂进行数值模拟。结果表明:裂纹最先起裂于界面,随后扩展至砂浆直至整个试件断裂破坏,数值分析结果与试验结果基本吻合,所采用的数值分析方法在模拟混凝土劈拉力学性能时具有较高的可靠性。

In meso-level,this paper studied on splitting tensile mechanical properties of concrete and simulated concrete coarse aggregate by different three dimensional random aggregate model.Meso-damage of concrete splitting tensile fracture was simulated by nonlinear finite element method.The results showed that t he first crack appeared in the interface,and then it extended to the mortar until the whole specimen fracture failure.The analysis results were consistent with the experiment.The numerical analysis method that they used was valid and reliable.