土工基础

›› 2012, Vol. 26 ›› Issue (1): 37-40.

• 工程实录 • 上一篇    下一篇

界面层厚度及其影响因素的离散元研究

李永松，周国庆   

  1. （中国矿业大学 深部岩土力学与地下工程国家重点实验室，江苏徐州 221008）
  • 收稿日期:2011-12-21 出版日期:2012-02-20 发布日期:2012-03-23
  • 作者简介:李永松,男，1988年生，硕士研究生，从事土与结构相互作用及数值模拟研究。
  • 基金资助:

    国家自然科学基金项目（50974117）

    国家青年科学基金项目（E090705）

DEM Research on Thickness and Influence Factor of Interface Layer

LI Yongsong, ZHOU Guoqing   

  1. (State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221008)
  • Received:2011-12-21 Online:2012-02-20 Published:2012-03-23

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。

关键词: 界面层, 直剪试验, 粗糙度, 数值模拟

Abstract: 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.

Key words: interface layer, direct shear test, roughness, numerical simulation