黏土弹塑性变形的数值模拟方法研究  

Methodology of numerical computation for elastoplastic deformation of clay

作　　者：艾有刚[1] 张心平[2] 李艳洁[1] 徐泳[1] 

机构地区：[1]中国农业大学理学院,北京100083 [2]中国农业大学水利与土木工程学院,北京100083

出　　处：《中国农业大学学报》2007年第1期81-84,共4页Journal of China Agricultural University

基　　金：国家自然科学基金资助项目(10372113)

摘　　要：在对黏土土样进行典型土力学实验的基础上,根据岩土材料的弹塑性理论,选取适用于岩土类材料的Drucker-Prager准则和与之相关的流动法则,对土样单轴压缩实验采用有限元软件进行数值模拟。模拟与试验结果比较表明:预测得到的屈服面与试验所得破坏面的方位吻合很好,证明所选的土的弹塑性模型是正确的;笔者提出的从土样试验提取模型参数,并根据土样特征选取相应模型进行数值计算的研究方法是可行的,适用用于土工程屈服失效问题的数值计算。Based on typical soil mechanical tests of a soil specimen, the Drucker-Prager criterion and related yield criterion for rocky/soil materials were adopted to carry out a numerical simulation for the simple compression test of the soil specimen using the Finite Element Method. A comparison between the results from the simulation and the tests was done and the results demonstrated a good coincidence of failure surface position and direction, which proved the soil elastoplastic model a valid approach. The method was proposed for relevant soil engineering computations, such as determining model parameters, and suitable model from soil tests, simulation of the same problem as the simple soil test to validate the selected model etc. Then a real simulation job can be conducted for a practical geotechnique problem.

关 键 词：土力学 土壤力学 弹塑性 有限元法 数值模拟 

分 类 号：TU411.7[建筑科学—岩土工程]