Finite element analysis on deformation of highembankment in heavy-haul railway subjected to freeze-thaw cycles |
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| Authors: | ChengYi Yu Shuang Tian Liang Tang XianZhang Ling GuoQing Zhou |
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| Affiliation: | School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China;School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China;School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China;State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China |
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| Abstract: | Finiteelement simulations are increasingly providing a versatile environment for this topic. In this study, a two-dimensional finite element analysis is conducted to predict the deformation of highembankment in Bazhun heavy-haul railway, China. A recently developed nonlinear softening-type constitutive model is utilized to model the behavior of subgrade filling materials subjected to freeze-thaw cycles. For the convenience of practical application, the dynamic loading induced by a vehicle is treated as a quasi-static axle load. The deformation of this embankmentwith different moisture content under freeze-thaw cycles is compared. The results show that when subjected to the first freeze-thaw cycle, the embankmentexperienced significant deformation variations. Maximum deformation was usually achieved after the embankment with optimum moisture content experienced six freeze-thaw cycles, however, the embankment with moisture content of 8.0% and 9.5% deforms continuously even after experiencing almost ten freeze-thaw cycles. Overall, this study provides a simple nonlinear finite element approach for calculating the deformation of the embankmentinchanging climate conditions. |
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| Keywords: | deformation nonlinear finite element analysis freeze-thaw cycles embankment heavy-haul railway |
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