Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (11): 1664-1668.DOI: 10.12068/j.issn.1005-3026.2017.11.029

• Resources & Civil Engineering • Previous Articles     Next Articles

Thermal Stress Analysis of CRTSII Track-Slab of High-Speed Railway Under a Uniform Cooling Condition

ZHAO Lei1, SUN Lu2,3, SUN Wei2, ZHAO Guo-tang4   

  1. 1. School of Transportation, Southeast University, Nanjing 210096, China; 2. Beijing General Municipal Engineering Design & Research Institute Co., Ltd., Beijing 100082, China; 3. Department of Civil Engineering, Catholic University of America, Washington D C 20064, USA; 4. China Railway Corporation, Beijing 100844. China.
  • Received:2016-03-08 Revised:2016-03-08 Online:2017-11-15 Published:2017-11-13
  • Contact: ZHAO Lei
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Abstract: A new calculation model of track-slab of high speed railway about temperature stress was established based on rail—track-slab—steel bar linear slip constitutive equations, and the analytic expression were derived using Laplace transform method.The influence of the parameters including reinforcement ratio, fastener buckle pressure and plate friction on the crack spacing and the changing characteristics of internal force and displacement of the track-slab under uniform cooling were studied with analytic expression. Finally, taking the CRTSII track plate under 30℃ cooling conditions with the respect to the Beijing—Shanghai high-speed railway as an example, the stress and displacement distribution of slab with the crack length and reinforcement ratio were calculated. It can be concluded that temperature stress of CRTSII track-slab can be analyzed effectively using the method and provides theoretical basis of design for ballastless track structure.

Key words: high speed railway, track structure, linear slip constitutive equations, calculation model for temperature stress, Laplace transform

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