Abstract：Research purposes: China is vast in territory，with huge difference in temperature from the north to south. The bridge span and the climate condition in China are longer and more complicated than those in Japan and Germany. As a result，the difficulty in design of continuously welded rail track in China is unique. Although the calculation accuracy of continuously welded rail track on bridges is very high，but the calculation must be done for every bridge. So there are lots of the calculation works to be done in the decision一making phase of the project. In order to simplify the calculation works，this paper presents a approximate formula to calculate the strength of continuously welded rail track and gives out a guidance suggestion about the design of the bridge span temperature.
Research conclusions : Based on the calculation of the track stress of the symmetrical continuous beams in different temperature spans，this paper summarizes the maximum temperature span in the Qiqihar, Xi an and Chengdu regions where it is unnecessary to install the rail overlapping device.(1)For installing the regular resistance fastening，the maximum temperature span in straight line section is less than 120 m and in curve section it is less than 120 min Qiqihar, the maximum temperature span in straight line section is less than 130 m and in curve section it is less than 120 m in Xian and in Chengdu，the maximum temperature span in straight line section is less than 180 m and in curve section it is less than 150 m.(2)For installing the low resistance fastening，in Qiqihar, the maximum temperature span in straight line section is less than 160 m and in curve section it is less than 130 m，in Xi an，the maximum temperature span in straight line section is less than 220 m and in curve section it is less than 170 m and in Chengdu，the maximum temperature span in straight line section it is more than 220m and in curve section it is more than 220 m. (3) The conclusion obtained in this paper is available for the symmetrical continuous beam and the bridge pier with the longitudinal stiffness of about 3 000 kN/cm in the straight and curve sections.
刘建利. 对称连续梁桥上无缝线路最大温度跨度适应性研究[J]. 铁道工程学报, 2013, 30(10): 40-43.
LIU Jian-li. Research on Maximum Temperature Adaptability of Continuously Welded Rail Track on the Symmetrical Continuous Beam Bridge. Journal of Railway Engineering Society, 2013, 30(10): 40-43.
Zhu Bin. Settings of Stretch Adjusters on Bridges of Continuously Welded Rail Track across Stations on Passenger Railway [J] .Railway Standard Design, 2006 (S):86-88.
Qu Cun, Gao Liang, Qiao Shenlu. Analysis of Mechanical Properties of CRTS I Continuously Welded Rail Track on Large Bridges of High Speed Railway [J].Railway Standard Design , 2011(4) :12-15.
Li Yan. Research on Design Approaches of Continuously Welded Rail Track on Large and Multi-span Continuous Bridges [J].Journal of Railway Engineering Society, 2004 (12) : 81-83.
[5] 蒋金州.高速铁路混凝土高架桥无缝线路的研究[J].铁道建筑，2004(增刊):34-38.
Jiang Jinzhou. Research on Continuously Welded Rail Track on Concrete Viaducts of High Speed Railway [ J ]. Railway Engineering , 2004 ( S ) : 34-38.
2013, Vol. 30 
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