松砂直剪试验中的经典与非经典场量数值分析  

Classical and Non-classical Variables Analysis of Loose Sand in Direct Shear Test by Discrete Element Method Analysis

作　　者：蒋明镜[1,2] 王富周[1,2] 朱合华[1,2] 肖俞[1,2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《同济大学学报（自然科学版）》2011年第7期960-965,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(10972158);国家杰出青年基金(51025932);高等学校博士学科点专项科研基金(20100072110048)

摘　　要：采用改进的离散元软件,模拟分析了松散砂土直剪试验中的经典与非经典场量.经典场量包括应力、应变、速度场以及应力路径;非经典场量包括转动场、组构和配位数等.分析了剪切过程中经典与非经典场量的变化规律,探讨了两种场量之间的联系.研究结果表明,非经典变量是经典变量的微观本质体现.In order to analyze variables of loose sand in the classical and non-classical direct shear test, numerical Investigation were carried out by DEM. Classical variables include stress, strain, velocity fields, and stress-path. Non- classical variables include averaged pure rotation rate（APR）, fabric and coordination number. In the study, the changes of variables and the relationships among them were analyzed. The results show that the non-classical variables are microscopically essence of classical variables.

关 键 词：离散元 剪应变 应力路径 平均纯转动率 组构 

分 类 号：TU41[建筑科学—岩土工程]