混凝土立方体抗压数值模拟研究

Numerical Simulation Study of Concrete Cube Compression

为了探究混凝土在单轴压缩下的力学特性,对混凝土立方体受压破坏过程进行数值模拟研究,引入质量缩放技术和单元失效准则提高了数值模拟的精度,结合试验结果给出了适用于混凝土材料的HJC模型参数。结果表明,质量缩放系数和最大主应变参数的取值会对数值模拟的结果产生显著影响,在使用合理的质量缩放系数以及单元失效参数前提下,HJC模型可以较为准确地模拟出混凝土立方体抗压的破坏过程,得到的破坏形态以及应力-应变曲线与试验结果的吻合度较好。计算结果为混凝土材料的数值模拟研究提供了一定的参考依据。

In order to explore the mechanical properties of concrete under uniaxial compression,the compressive failure process of concrete cube was numerically simulated,the mass scaling technique and element failure criterion were introduced to improve the accuracy of the numerical simulation,and the concrete HJC model parameters were debugged.The results show that the values of the mass scaling coefficient and the maximum principal strain parameter will have a significant impact on the numerical simulation results,and under the premise of using reasonable mass scaling coefficient and unit failure parameters,the HJC model can accurately simulate the failure process of concrete cube compression,and the failure morphology and stress-strain curve are in good agreement with the test results.The research results provide a certain reference for the numerical simulation of concrete materials under complex stress conditions.