论文部分内容阅读
以冻土与扩大台基作为一个整体结构，将各向弹性模量及泊松比随温度、水分、应力变化的冻土视为正交各向异性的非线性材料；将冻土冻胀系数作为负线膨胀系数，按结构温度应力的计算方法，应用结构非线性分析的有限元法，对冻土与扩大台基之间的相互作用进行了数值计算，获得其应力场、位移场及冻土与扩大台基之间的各种作用力；理论分析结果与模型试验吻合，并提出了一种求解冻土与基础相互作用的通用数值分析方法。
With permafrost and enlarged subgrade as a whole structure, the permafrost modulus and Poisson’s ratio with temperature, moisture, and stress changes in the frozen soil are regarded as orthotropic non-linear materials; the frozen soil frost heaving coefficient As a negative coefficient of linear expansion, according to the calculation method of the structural temperature stress, the finite element method of structural nonlinear analysis was used to perform numerical calculations on the interaction between the frozen soil and the expanded subgrade, and its stress field, displacement field and freezing were obtained. The various forces between the soil and the enlarged platform; the theoretical analysis results are in good agreement with the model test, and a general numerical analysis method for solving the interaction between the frozen soil and the foundation is proposed.