Analysis of Influencing Factors of Welded Turnout Slab with Convex Block of Ballastless Track on Bridge

Abstract:

To figure out the structure and influencing factors of welded welded turnout slab convex block of ballastless track on bridge, according to the characteristics of force and displacement of welded turnout on bridge, the turnout-bridge-platform integration computation model was established by finite element method. Taking the ballastless turnout on a continuous beam bridge as the example, the longitudinal force and displacement of the bridge and parts of the turnout was obtained by the means of changing the numbers of slab, the stiffness of convex block support and the temperature range of slabs. The calculation results indicate: using three slabs is reasonable for the ballastless turnout on bridge; The stiffness of convex block supports on slabs should be set between 250kN/mm and 300kN/mm; Since the change of longitudinal force is very large, while the other parameters change little, with the change of the temperature range of slabs, slabs in turnout should be strengthen.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 1664-1668
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.1664
• Online since: July 2011
• Authors: Yuan Xing Hao, Feng Dai, Rong Shan Yang
• Keywords: Ballastless Track, Bridge, Convex Block, Slab, Welded Turnout

References

[1] Rong Chen, Optimization of Dynamic Design for Ballastless Turnout on Bridges in High Speed Railways, ICCTP: Integr. Transp. Syst. - Green, Intelligent, Reliab. - Proc. Int. Conf. Chin. Transp. Prof, 2010: 3305-3312.

DOI: 10.1061/41127(382)356

[2] Shuguo Wang, Analysis on the Temperature Stress and Deformation of Large-size Continuously Welded Turnout by Finite Element Program, China Railway Science, 2005: 68-72.

[3] Juanjuan Ren, Force Characteristics of Longitudinally Coupled Slab Track Turnout on Bridges Under Temperature Action, Transportation Research Record, 2010(2159): 85-90.

DOI: 10.3141/2159-11

[4] Zhiping Zeng, Analysis of Influence factor of Temperature force and displacement of welded turnout on continuous beam bridge, China Railway Science, 2006, 6(1): 35-38.

[5] Rongshan Yang, Analysis of Factors Influencing Longitudinal Force of Welded Turnout on Simply Supported Beam Bridge, Journal of Southwest Jiaotong University, 2010(5): 669-675.