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| Research on Temperature Effect on the Structure of Slab Ballastless Track SHI Xian-feng1，LI Jian-bin2 |
| SHI Xian-feng1，LI Jian-bin2 |
| 1. Shijiazhuang Railway Institute, Shijiazhuang, Hebei 050043，China; 2. Hebei Province Educational Examination Institute, Shijiazhuang, Hebei 050091，China |
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Abstract Research purposes: Based on the theory of heat transferring, with the finite-element analysis method and software ABAQUS, the simulation calculation of temperature effect on slab ballastlesa track is carried out and the analyses of the influences of the different supporting foundations and different width and thickness of slab on temperature effects to ballastless track are made for the purpose of providing the basis for the structure design of ballastless track.
Research conclusions: (1)The relation between the change of difference in temperature and the structural transmutation is not linear. The higher the temperature is , the larger the change range of structural transmutation becomes. ( 2 ) The stresses in slab caused by difference in temperature on the rigid foundation are much bigger than that on the elastic foundation, but the slab's maximal difference in vertical displacement on the rigid foundation is less than that on the elastic foundation. ( 3 ) On the assumed condition of same lapse rate, the deformations in slab increase with the increase of the thickness and width of slab.
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Received: 18 December 2007
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[3] 铁道科学研究院，秦沈客运专线第二次综合试验总报告， 铁道科学研究院,2002.
[4] 铁道科学研究院，遂渝线无砟轨道综合试验段无砟轨道 设计技术条件，铁道科学研究院，2004.
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2008, Vol. 25 
