模拟冻-融过程的热-水-应力耦合模型及数值分析  

COUPLED THERMO-HYDRO-MECHANICAL MODEL AND NUMERICAL ANALYSIS FOR SIMULATION OF FREEZING-THAWING PROCESS

作　　者：张玉军[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《固体力学学报》2009年第4期409-415,共7页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金项目(50578171)资助

摘　　要：考虑低温条件下出现水-冰相变并有潜热产生的特点,将所开发的热-水-应力耦合模型及其二维有限元程序作了改进,使之可用于岩土体冻融问题的分析.并以Neaupane等的岩石室内冻-融试验为对象进行了数值模拟,将计算、试验和Neaupane的计算中所得的岩石试样上特定点的温度-时间曲线、温度-径向应变曲线作了对比,看到三者的接近程度较好,同时考察了本计算所得的一个岩石试样中不同时刻的温度、位移及应力分布,得出了若干结论.Considering the phase change and latent heat production under the condition of low temperature,the coupled thermo-hydro-mechanical model and 2D FEM code developed by the author are improved in this study for the purpose that they can be used for analysis of the freezing-thawing problem in soil and rock. To validate this model, numerical simulations on the freezing-thawing experiment by Neaupane et al are carried out here. Comparing the curves of temperature-time and temperature-radial strain at special points of the specimens obtained computationally by the author and experimentally by Neaupane et al,satisfactory agreement is found. At the same time, the distributions of temperature, displacement and stress in the specimen are investigated, with some valuable conclusions obtained.

关 键 词：冻-融过程 热-水-应力耦合 数值模型 有限元分析 

分 类 号：TU458[建筑科学—岩土工程] TH49[建筑科学—土工工程]