粘性土平面应变试验颗粒流模拟可行性研究

Feasibility study of the simulation of plane strain test by particle flow code on clay

对四组 PFC2 D的数值仿真结果和粘土试样室内平面应变试验的实测曲线进行了对比 ,研究表明利用颗流理论所建立起来的 PFC2 D数值仿真试验模型是能够通过改变计算模型中颗粒单元的性质颗粒集合体的级配特征等 ,针对颗粒流仿真试样的细观力学特征与物理试样宏观力学响应之间的关系进行了参数研究 。

Four sets of PFC 2D numerical simulation results have been compared with the lab plane strain test results of clay, it indicates the strong possibility of using PFC 2D model based on particle flow theory to numerically simulate the lab plane strain tested constitutive behavior of real geo materials by adjusting quality of particles and particle assembly in the model. The most prime meaning of this research lies in the fact that the numerical simulation test by PFC 2D model can break through the limits of real lab tests on soils caused by equipment capacity and experiment conditions, ultimately the model can predict some constitutive behaviors of soil and hence is valuable to the study of this aspect.Some laws,which will be referential to the study of the application of PFC to the geotechnical problems, are discovered.