土的室内平面应变试验的颗粒流模拟  

Simulating Plane Strain Test of Soils by Particle Flow Code

作　　者：周健[1] 廖雄华[1] 池永[1] 徐建平 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]武汉轨道交通有限公司总工程师办公室,湖北武汉430017

出　　处：《同济大学学报（自然科学版）》2002年第9期1044-1050,共7页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金资助项目 (5 0 1780 5 4);上海市科学技术发展基金资助项目 (0 0 5 1110 5 6);教育部高等学校博士学科点专项科研基金资助项目 (2 0 0 0 0 2 472 4)

摘　　要：作为颗粒流理论实际应用的前期可行性研究 ,针对具有凝聚力和无凝聚力的两类典型的内摩擦地质材料粘性土与砂土进行了材料试样室内平面应变试验结果的颗粒流PFC2D仿真 .对比研究表明利用颗粒流理论所建立起来的PFC2D数值仿真试验模型是能够通过改变计算模型中颗粒单元的性质 ,以及颗粒集合体的级配特征等给出与真实材料土工试验类似的本构行为的 .这种可行性最根本的意义在于基于颗粒流理论的数值仿真试验能够突破常规土工试验在仪器设备能力及试验条件上的局限性 ,对实际土样的本构行为作出理论方面的某种预测 .此外针对颗粒流仿真试样的细观力学特征与物理试样宏观力学响应之间的关系进行了参数研究 ,并揭示了一些规律 .这些工作对颗粒流理论在岩土工程实际应用方面的研究和开发有一定的参考价值 .It is essential to simulate plane strain test of geo-materials by particle flow code as the prophase research on the application feasibility of particle flow theory to practical engineering problems research.Some PFC 2D simulation results have been compared with the lab results of sand and clay.It indicates the strong possibility of using PFC 2D model to simulate the lab plane strain tested constitutive behavior of real geomaterials by adjusting quality of particles and particle assembly in the model.The most prime meaning of this research lies in the fact that PFC 2D model can break through the limits of real lab tests caused by equipment capacity and experiment conditions,ultimately be able to predict some constitutive behaviors of soil and hence be valuable to the study of this aspect.In addition,the research was also performed on the aspect of the relationship between the micro-parameters of PFC 2D sample and the mechanical response of physical sample.Some laws are discovered,which will be referential to the study of the application of PFC and to the geotechnical problems.

关 键 词：室内平面应变试验 颗粒流模拟 颗粒流理论 粘土 砂土 应力-应变关系 内腐擦材料 

分 类 号：TU411.3[建筑科学—岩土工程]