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| Numerical analysis for random temperature fields of embankment in cold regions | |
| 作者姓名： | LIU ZhiQiang LAI YuanMing ZHANG MingYi & ZHANG XueFu State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental and Engineering Research Institute Chi- nese Academy of Sciences Lanzhou China School of Civil Engineering Lanzhou Jiao Tong University Lanzhou China Chongqing Jiao Tong University Chongqing China |
| 作者单位： | LIU ZhiQiang1，2，LAI YuanMing1，ZHANG MingYi1 & ZHANG XueFu3 1 State Key Laboratory of Frozen Soil Engineering，Cold and Arid Regions Environmental and Engineering Research Institute，Chi- nese Academy of Sciences，Lanzhou 730000，China; 2 School of Civil Engineering，Lanzhou Jiao Tong University，Lanzhou 730070，China; 3 Chongqing Jiao Tong University，Chongqing 400074，China |
| 基金项目： | 国家杰出青年学者自然科学基金;中国科学院知识创新工程项目;the CAS Special Fund for the National Excellent PhD Dissertation Author (to Dr．Lai，Y.M.);中国科学院知识创新工程项目;国家自然科学基金 |
| 摘 要： | The stochastic finite element equations for random temperature are obtained using the first-order per-turbation technique taking into account the random thermal properties and boundary condition, based on heat transfer variational principle. The local average method for 2-D is used to discretize random fields. Then, the random temperature fields of embankment in cold regions are investigated on condi-tion that the thermal properties and boundary condition are taken as random fields, respectively, by using the program, which is written by the methods. The expected value of temperature field and the standard deviation of the temperature field of embankment in cold regions are obtained and analyzed. |
| 收稿时间： | 10 June 2005 |
| 修稿时间： | 30 August 2005 |
Numerical analysis for random temperature fields of embankment in cold regions |
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| LIU ZhiQiang,,LAI YuanMing,ZHANG MingYi & ZHANG XueFu State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,Chi- nese Academy of Sciences,Lanzhou ,China, School of Civil Engineering,Lanzhou Jiao Tong University,Lanzhou ,China, Chongqing Jiao Tong University,Chongqing ,China.Numerical analysis for random temperature fields of embankment in cold regions[J].Science in China(Earth Sciences),2007,50(3):404-410. | |
| Authors: | Liu ZhiQiang Lai YuanMing Zhang MingYi Zhang XueFu |
| Institution: | 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;School of Civil Engineering, Lanzhou Jiao Tong University, Lanzhou 730070, China 2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China 3. Chongqing Jiao Tong University, Chongqing 400074, China |
| Abstract: | The stochastic finite element equations for random temperature are obtained using the first-order per- turbation technique taking into account the random thermal properties and boundary condition, based on heat transfer variational principle. The local average method for 2-D is used to discretize random fields. Then, the random temperature fields of embankment in cold regions are investigated on condi- tion that the thermal properties and boundary condition are taken as random fields, respectively, by using the program, which is written by the methods. The expected value of temperature field and the standard deviation of the temperature field of embankment in cold regions are obtained and analyzed. |
| Keywords: | frozen soil embankment Qinghai-Tibet railway random temperature field numerical analysis stochastic finite element method |
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