摘要
利用离散元颗粒流程序PFC2D对砂土的直剪试验进行了模拟,试验中通过改变颗粒的孔隙比、接触刚度和粒间摩擦系数等微观参数的取值,来探究宏观参数如初始弹性模量和内摩擦角的变化。得到颗粒的平均配位数随孔隙比的变化曲线、不同围压下颗粒的法向重叠量随颗粒刚度的变化曲线和材料内摩擦角和颗粒摩擦系数间的关系曲线,有益于理解土体的本构模型。
The direct shear tests of sandy （PFC2D）. In the tests the void ratio particle soil are simulated by particle flow code in two stiffness and particle frictional coefficient are c dimension hanged to different values to investigate the variations of macro-parameters such as Young＇ s modulus and internal friction angle. The curve of average coordination number with void ratio, the curve of particle overlap with normal stiffness and the curve of relationship between internal friction angle and particle frictional coefficient are described, which are beneficial to develop the soil constitutive models.
出处
《低温建筑技术》
2013年第1期96-98,共3页
Low Temperature Architecture Technology
关键词
直剪试验
颗粒流
参数敏感性
direct shear test
particle flow code
parameter sensitivity
