冻土中锥形桩-土大变形有限元数值分析  

A FEM Analysis of Cone-shaped Pile Coupling Large Deformation of Frozen Soil

作　　者：李栋伟[1] 汪仁和[1] 胡璞[2] 崔灏 

机构地区：[1]安徽理工大学土木工程系,安徽淮南232001 [2]安徽省建设厅,安徽合肥230001 [3]北京中煤矿山工程有限公司,北京100013

出　　处：《冰川冻土》2007年第4期640-644,共5页Journal of Glaciology and Geocryology

基　　金：安徽省高校青年教师基金项目(2007JQ1044);安徽理工大学青年教师基金资助项目(QN200607);安徽理工大学博士;硕士基金项目资助

摘　　要：应用冻土的粘弹塑本构力学模型,采用温度场与冻土大变形耦合作用的方法,编制了能够模拟寒区冻土大变形的本构有限元程序;并通过用户子程序嵌入到大型商业有限元软件ADINA中,对冻土中锥形桩室内模型试验进行了变形场和温度场耦合的有限元数值模拟.有限元计算结果和模型试验结果非常接近,并且两者的规律性也相同,验证了耦合温度自由度的粘弹塑本构力学模型的正确性和可靠性,表明应用有限元分析方法可为寒区冻土中锥形桩基工程设计提供参考.Based viscoelastic-plastic model of frozen soil, using the method in which the temperature field and the large deformation field are coupled, a plane FEM program which can simulate the frozen soil in cold regions is proposed. The viscoelasticplastic constitutive model for geo-materials is embedded into the commercial FEM software ADINA as a user＇s subroutine. The FEM numerical simulation result of the cone-shaped pile model is close to the model test result, with a similar regularity. This result verifies that viscoelastic-plastic constitutive model of couping temperature freedom-degree is correct and reliable, which can be taken as a reference for designing cone-shaped pile in frozen soil.

关 键 词：粘弹塑性本构模型 大变形 锥形桩 模型试验 

分 类 号：TU473[建筑科学—结构工程]