计算力学学报2016，Vol.33Issue(5)：753-759,790,8.DOI:10.7511/jslx201605015
块石形状对土石混合体力学行为影响的颗粒流模拟
Particle flow simulation for effects of rock block shape on mechanical behavior of soil-rock mixture
摘要
Abstract
In order to explore the meso-mechanisms of effects of rock block shape on mechanical behavior of soil-rock mixture (SRM),spherical,cubic and cuboid-shaped rock blocks are taken into consideration. SRM with cubic rock blocks are compared with that of spherical rock blocks to explore the effects of block angularity.SRM with cuboid-shaped rock blocks are compared with that of cubic rock blocks to explore the effects of block sphericity.Firstly,a 3D DEM refined modeling method for specific rock block shape was developed.Then,particle flow numerical models of SRM with 30% and 80% rock block proportion (RBP)were established,whose block shape is spherical,cubic and cuboid-shaped respec-tively.Then,particle flow simulation for large scale triaxial tests of SRM was conducted to obtain strength and deformation characteristics of SRM with different rock block shape and RBP.Finally, meso-mechanisms of effects of rock block shape on mechanical behavior of SRM were intensively analyzed.The results show that rock block shape affect the mechanical behavior of SRM and the degree of influence are closely related to RBP.The evolution of coordination number,mean rotation of rock blocks and frictional work can well reflect the meso-mechanisms of effects of rock block shape.关键词
土石混合体/颗粒流/块石形状/含石量/细观机理Key words
soil-rock mixture/particle flow code/rock block shape/rock block proportion/meso-mechanisms分类
建筑与水利引用本文复制引用
金磊,曾亚武..块石形状对土石混合体力学行为影响的颗粒流模拟[J].计算力学学报,2016,33(5):753-759,790,8.基金项目
国家自然科学基金项目(41272342)资助项目 （41272342）
