土木工程与管理学报2011，Vol.28Issue(4)：24-29,6.
粗粒土三轴试验的细观模拟
Meso-mechanics Simulation Triaxial Test of Coarse-grained Soil
摘要
Abstract
Consolidated-drained triaxial test is conducted for coarse-grained soil, based on the values of this test and three dimension particle flow code theory, the numerical model of triaxial test for graded coarse-grained soil is obtained by programming PFC3D (particle flow code of three dimension)from the view of microscopic scale. Stress-strain relationship of particle flow model and triaxial test are compared under different confining pressure. The influence of micro-properties on coarse-grained soil strength is analysed. The numerical results show that the strength of PFC model is lower than that of test, the increasing of friction coefficient between particles and bonded strength in contact result in higher strength of model. The particle shape has significant effects on the shear strength of numerical model. The research found the effect on coarse-grained soil strength from the view of microscopic scale and the results overcome the limits of real lab tests.关键词
粗粒土/三轴试验/细观模拟/颗粒形状Key words
coarse-grained soil/ triaxial test/ meso-mechanics simulation/ particle shape分类
建筑与水利引用本文复制引用
耿丽,黄志强,苗雨..粗粒土三轴试验的细观模拟[J].土木工程与管理学报,2011,28(4):24-29,6.基金项目
国家自然科学基金(50808090) （50808090）
