用于触探试验分析的粒状材料本构模型之展望  

Main features of future constitutive models for granular materials in penetration analysis

作　　者：蒋明镜[1] 

机构地区：[1]同济大学土木学院地下建筑与工程系岩土及地下工程教育部重点实验室,上海200092

出　　处：《岩土工程学报》2007年第9期1281-1288,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(50679057);上海市浦江人才计划(06PJ14088)

摘　　要：讨论了用于触探试验分析的粒状材料本构模型。利用二维离散元程序,对粒状材料触探试验进行数值模拟,研究了地基中的应力路径与应力场,然后基于土力学中的最新知识,分析总结出试验中粒状材料的主要力学特点。研究表明,在粒状材料的触探试验分析中,其本构模型应当包含4个主要特性:剪胀性、率相关性、颗粒破碎和非共轴性。The main features of future constitutive models for granular materials in penetration analysis were discussed. A two-dimensional discrete element method （DEM） was used to numerically simulate penetration tests on a granular ground. The stress paths and stress fields in the ground were studied and then compared with the advanced knowledge in soil mechanics in order to highlight the main features of granular materials for the penetration analysis. It was shown that the shear dilatancy, rate-dependency, particle crushing and non-coaxiality were the four main features that should be captured in future constitutive models for granular materials in the penetration analysis.

关 键 词：本构模型 触探试验 离散元法 粒状材料 

分 类 号：TU411[建筑科学—岩土工程]