| 土冻结过程中的水热力三场耦合数值分析 |
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| 引用本文： | 许强,彭功生,李南生,刘卓.土冻结过程中的水热力三场耦合数值分析[J].同济大学学报(自然科学版),2005,33(10):1281-1285. |
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| 作者姓名： | 许强 彭功生 李南生 刘卓 |
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| 作者单位： | 同济大学,建筑工程系,上海,200092 |
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| 基金项目： | 中国科学院知识创新工程重大资助项目（KZCX1-SW-043）. |
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| 摘 要： | 冻土在冻结、融化的过程中，未冻区和正冻区发生的物理过程均涉及温度场、水分场、应力场三场的耦合作用问题。尤其在土体的冻胀变形和分凝冰的形成过程中，冻胀应力对冻土地区结构物具有不容忽视的影响。为此，提出了“三场”耦合分析的一般数学格式，采用有限元思想导出相应的时空离散化方程，并给出了非线性数值求解的迭代计算步骤。另外，还给出具体的数值算例，以验证方法的可靠性、有效性和计算精度。
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| 关 键 词： | 冻土 水热力耦合 有限元分析 |
| 文章编号： | 0253-374X（2005）10-1281-05 |
| 收稿时间： | 11 10 2004 12:00AM |
| 修稿时间： | 2004-11-10 |
Numerical Method of Phase-Change Field of Temperature Coupled with Moisture, Stress in Frozen Soil |
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| XU Qiang,PENG Gong-sheng,LI Nan-sheng,LIU Zhuo.Numerical Method of Phase-Change Field of Temperature Coupled with Moisture, Stress in Frozen Soil[J].Journal of Tongji University(Natural Science),2005,33(10):1281-1285. |
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| Authors: | XU Qiang PENG Gong-sheng LI Nan-sheng LIU Zhuo |
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| Institution: | Department of Building Engineering, Torsi University, Shanghai 200092, China |
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| Abstract: | The correlation between temperature,moisture and stress must be concerned in frozen soil no matter it is in the process of melting or freezing. Especially in the processes of frost heave and formation of ice, the function of stress is greatly important. In this paper, an analysis model is given concerning moisture, temperature and stress simultaneously. By the use of finite element method, the detailed deduction of the computational equations is given as well the iterative calculation process. In ad- dition, an example is presented to testifv the validity and precision of the model. |
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| Keywords: | frozen soil coupling equation between moisture temperature and stress finite element method |
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