摘要
采用可以模拟接触面粗糙度的PFC直剪模型,对不同接触面粗糙度和颗粒半径进行了数值模拟,通过追踪接触面附近每一个颗粒的位移变化,分析了界面层的厚度及其影响因素。结果表明:界面层厚度与接触面和颗粒本身的性质密切相关,表征接触面粗糙度的峰谷距和坡角越大,界面层的厚度越大,颗粒平均半径越小,剪切时的界面层厚度也越大。
A series of numerical soil-structure shear tests were performed by Particle Flow Code(PFC) in two dimensions,the effect of the roughness of the interface and the particle radius on the thickness of the interface layer were studied.It is shown that the roughness of interface and the particle radius affect the thickness of interface layer significantly;the thickness of interface layer increases with the decrease of the particle radius as well as the increase of the roughness of the interface.
出处
《土工基础》
2012年第1期37-40,共4页
Soil Engineering and Foundation
基金
国家自然科学基金项目(50974117)
国家青年科学基金项目(E090705)
关键词
界面层
直剪试验
粗糙度
数值模拟
interface layer
direct shear test
roughness
numerical simulation