岩土力学2013，Vol.34Issue(3)：863-873,11.
不同重力场下静力触探试验离散元数值分析
Numerical analysis of cone penetration tests under different gravity fields by distinct element method
摘要
Abstract
The cone penetration tests under seven different gravity fields were studied by a commercial distinct element method (DEM) code PFC2D (particle flow code) in order to investigate the relationship between cone penetration tests under high and low gravity fields. The numerical results show that cone penetration has an apparent effect on the upper zone of the ground under low gravity fields, while it has a significant effect on the lower zone of the ground under high gravity fields. The maximum (steady) values of the normalized cone tip resistance and the maximum values of normalized mean stress and deviatoric stress increase linearly with the reciprocal of gravity accelerations. The soil around the penetrometer undergoes apparently loading and unloading process during the penetration process, with the smaller gravity field corresponding to the more apparent loading and unloading phenomenon, while the upper zone of the ground undergoes the loading and unloading process more apparently than the lower zone under the same gravity field.关键词
不同重力场/静力触探试验/离散单元法Key words
different gravity fields/ cone penetration test/ distinct element method分类
数理科学引用本文复制引用
蒋明镜,王新新..不同重力场下静力触探试验离散元数值分析[J].岩土力学,2013,34(3):863-873,11.基金项目
国家杰出青年科学基金项目(No.51025931) （No.51025931）
国家自然科学基金项目(No.51179128) （No.51179128）
上海市优秀学术带头人计划项目(No.11XD1405200). （No.11XD1405200）
