摘要
砂卵石土颗粒受生成环境的影响,呈现出不同形态、尺寸变化大等特点。不同粒度的颗粒介质对其力学性能有很大的影响,针对砂卵石土的颗粒组成,采用Clump Logic生成超级颗粒单元体,用ARRAY命令生成不同级配颗粒介质进行直剪试验的离散元数值模拟计算,并讨论了不同级配的平均摩擦系数对剪切强度的影响。结果表明:数值模拟的抗剪强度特性与试验结果较吻合,不同级配的砂卵石土颗粒对直剪过程中平均摩擦系数有一定的影响,且轴压越小表征得越明显。
The particles of sandy pebble soil are affected by environment,showing different shapes and dimension change. Particles of different sizes have a great influence on the mechanical properties,for it,super body particles generated by Clump Logic and different levels of particulate media produced by the ARRAY command are used to discuss the average coefficient of friction with different levels of shear strength. The results show that the shear strength characteristics of numerical simulation agree well with the experiment,particles of sandy pebble soil with different gradations have an influence on average friction coefficient in the process of direct shear,and the smaller the axial compression,the more obvious.
出处
《四川建筑科学研究》
北大核心
2015年第5期51-54,共4页
Sichuan Building Science
基金
国家自然科学基金委员会和中国工程物理研究院联合基金资助项目(11076023)
西南科技大学研究生创新基金资助项目(14ycx097)
关键词
砂卵石土
颗粒组成
直剪试验
离散元法
sandy pebble soil
particle composition
direct shear test
discrete element method
