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| Stochastic Temperature Field of Frozen Soil Roadbed Based on MonteCarlo Method |
| SUN Hong-1, NIU Fu-Jun-2, CHEN Zhe-1, GE Xiu-Run-1 |
| (1.School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2.State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China) |
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Abstract Because of uncertain thermal parameters, the stochastic temperature field of frozen soil roadbed can be correctly analyzed using the stochastic finite element method. Statistical characteristics of geotechnial thermal parameters were analyzed along the Qinghai-Tibet railway, and then random temperature fields of a typical frozen soil roadbed were calculated by the finite element method based on Monte-Carlo method. The results show that the distribution patterns of average temperature fields are similar to that of the standard deviation, and the bigger values are on the scope of top and slope surface of roadbed. The standard deviation, which is the biggest in the boundary, becomes smaller from the boundary to interior, and comes to more uniform at some depth. The standard deviations increase and its distribution scopes enlarge with the time.
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Received: 05 November 2010
Published: 30 May 2011
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