双标量损伤模型及其在Biot固结有限元中的应用  

Double scalar variables damage model and its application to Biot's consolidation FEM

作　　者：薛新华[1] 张我华[1] 

机构地区：[1]浙江大学软弱土与环境土工教育部重点实验室,杭州310027

出　　处：《岩土力学》2010年第1期20-26,共7页Rock and Soil Mechanics

基　　金：国家自然科学研究基金(No.50379046)资助

摘　　要：在前人工作的基础上,推广并发展了各向同性双标量损伤变量理论,推导出双标量损伤变量模型的损伤演化方程。然后,将其引入比奥固结有限元方程中,并据此编制相应的双标量损伤变量流-固耦合有限元程序。最后,对一个软土路基有限元简化模型进行分析计算,并以典型节点为例,绘制了模型沉降值、孔压值、损伤变量等的变化曲线。结果表明,利用双标量损伤变量模型描述土的本构关系比单标量损伤模型更加合理。The theory of isotropic double scalar damage variables was presented and developed based on the research work done by the predecessors firstly. Then, the elastic damage evolution equation described by the double scalar damage variables was deduced; and the finite element program for the coupled seepage and damage was written using the computer language Fortran90 based on the modified Bi＇ot＇s theory. Finally, a simple roadbed foundation model was analyzed using the computer program written personally; and the typical node＇s settlement, pore pressure, damage variables were analyzed and discussed. The results show that the double scalar damage variables model is more reasonable than the single scalar damage variable model in describing the constitutive relation of soils.

关 键 词：双标量损伤变量 比奥固结理论 弹性能函数 损伤演化方程 

分 类 号：TU432[建筑科学—岩土工程]