- Volume 63 Issue 6
DOI QR Code
Interaction analysis of Continuous Slab Track (CST) on long-span continuous high-speed rail bridges
- Dai, Gonglian (Department of Civil Engineering, Central South University) ;
- Ge, Hao (Department of Civil Engineering, Central South University) ;
- Liu, Wenshuo (Department of Civil Engineering, Central South University) ;
- Chen, Y. Frank (Department of Civil Engineering, Xijing University)
- Received : 2017.01.03
- Accepted : 2017.05.07
- Published : 2017.09.25
As a new type of ballastless track, longitudinal continuous slab track (CST) has been widely used in China. It can partly isolate the interaction between the ballastless track and the bridge and thus the rail expansion device would be unnecessary. Compared with the traditional track, CST is composed of multi layers of continuous structures and various connecting components. In order to investigate the performance of CST on a long-span bridge, the spatial finite element model considering each layer of the CST structure, connecting components, bridge, and subgrade is established and verified according to the theory of beam-rail interaction. The nonlinear resistance of materials between multilayer track structures is measured by experiments, while the temperature gradients of the bridge and CST are based on the long-term measured data. This study compares the force distribution rules of ballasted track and CST as respectively applied to a long span bridge. The effects of different damage conditions on CST structures are also discussed. The results show that the additional rail stress is small and the CST structure has a high safety factor under the measured temperature load. The rail expansion device can be cancelled when CST is adopted on the long span bridge. Beam end rotation caused by temperature gradient and vertical load will have a significant effect on the rail stress of CST. The additional flexure stress should be considered with the additional expansion stress simultaneously when the rail stress of CST requires to be checked. Both the maximum sliding friction coefficient of sliding layer and cracking condition of concrete plate should be considered to decide the arrangement of connecting components and the ultimate expansion span of the bridge when adopting CST.
Supported by : Natural Science Foundation of China, Central South University, China Postdoctoral Science Foundation
- Aleksandrova, N.N. (2016), "Effect of thermal gradients on stress/strain distributions in a thin circular symmetric plate", Struct. Eng. Mech., 58(4), 627-639. https://doi.org/10.12989/sem.2016.58.4.627
- Cai, X.P., Gao, L., Sun, H.W. and Qu, C. (2011) "Analysis on the mechanical properties of longitudinally connected ballastless track continuously welded rail on bridge", China Railw. Sci., 32(6), 28-33.
- Chen, X.P. (2012), "Analysis on influencing factors of additional expansion and contraction forces between CRTSII slab ballastless track and long-span continuous beam bridge", J. Fuzhou Univ., 40(3), 383-387.
- Dai, G.L. and Su, M. (2016), "Full-scale field experimental investigation on the interfacial shear capacity of continuous slab track structure", Arch. Civ. Mech. Eng., 16(3), 485-493. https://doi.org/10.1016/j.acme.2016.03.005
- Dai, G.L., Su, H.T. and Yan, b. (2015), "Experimental study on the vertical temperature gradient of longitudinally connected slab ballastless track on bridge in autumn", J. Hunan Univ., 42(3), 94-99.
- Fu, X.J. (2008), "Reasonable pier stiffness of CRTS II Ballastless track on bridge", Master Dissertation, Southwest Jiaotong University, Chengdu.
- Hu, S.T., Liu, W.B. and Jiang, Z.Q. (2008), Summary of Design Principle and Method of CRTS II Slab Ballastless Track in Beijing-Tianjin City Railway, China Academy of Railway Sciences, Beijing, China.
- International Union of Railways (UIC) (2001), Track/Bridge Interaction Recommendations for Calculations, Paris, France.
- Jia, M.X. (2010), "Influential factors analysis of longitudinal force in bridges with CRTSII-type slab ballastless track", Master. Dissertation, Southwest Jiaotong University, Chengdu.
- Li, D.S., Niu, B. and Hu, S.T. (2016), "Mechanical properties of CRTS II slab ballastless track on long temperature span concrete bridge", China Railw. Sci., 37(3), 22-28.
- Li, Y. (2012), "Study on variation rules of longitudinal force of continuous welded rails on long-span cable-stayed bridge", J. Railw. Eng Soc., 10(10), 42-46.
- Liu, X.Y., Zhao, P.C., Yang, R.S. and Wang, P. (2010), Theory and Method of Unballasted Track of Passenger Dedicated Line, Southwest Jiao Tong University Press, Chengdu, Sichuan, China.
- Ministry of Railways of China (2003), Interim Code for Design of Railway Continuously Welded Rail on The Newly Built Railway Bridge, China Railway Publishing House, Beijing, China.
- Ministry of Railways of China (2004), Interim Code for Design of Beijing-Shanghai High Speed Railway, China Railway Publishing House, Beijing, China.
- Nan, H., Dai, G.L., Bin, Y. and Ke, L. (2014), "Recent development of design and construction of medium and long span high-speed railway bridges in China", Eng. Struct., 74, 233-241. https://doi.org/10.1016/j.engstruct.2014.05.052
- Ren, J.J., Wang, P. and Liu, X.Y. (2011), "Influencing factors of temperature force and displacement of longitudinally coupled ballastless welded turnout on bridges of dedicated passenger lines", J. China Railw. Soc., 2(33), 79-85.
- Ruge, P. and Birk, C. (2007), "Longitudinal forces in continuously welded rails on bridge decks due to nonlinear track-bridge interaction", Comput. Struct., 85(7/8), 458-475. https://doi.org/10.1016/j.compstruc.2006.09.008
- Ruge, P., Widarda, D.R., Schmalzlin, G. and Bagayoko, L. (2009), "Longitudinal track-bridge interaction due to sudden change of coupling interface", Comput. Struct., 87, 47-58. https://doi.org/10.1016/j.compstruc.2008.08.012
- TB 10015-2012 (2012), Code for Design of Railway Continuously Welded Rail, China Railway Publishing House, Beijing, China.
- TB 10621-2009 (2009), Code for Design of High-speed Railway, China Railway Publishing House, Beijing, China.
- The Third Railway Survey and Design Institute Group Corporation (2009), Technical Specification for High Strength Plastic Plate of CRTS II Slab Ballastless Track of Passenger Dedicated Railway, China Academy of Railway Sciences, Beijing, China.
- Wei, X.K., Zhou, Y., Liu, H. and Wang, P. (2015), "Theoretical and experimental study on longitudinal interaction of CWR on railway cable-stayed bridge", Railw. Stand. Des., 59(8), 62-67.
- Ye, X.W., Ni, Y.Q. and Yin, J.H. (2013), "Safety monitoring of railway tunnel construction using FBG sensing technology", Adv. Struct. Eng., 16(8), 1401-1409. https://doi.org/10.1260/1369-43220.127.116.111
- Ye, X.W., Su, Y.H., Xi, P.S., Chen, B. and Han, J.P. (2016), "Statistical analysis and probabilistic modeling of WIM monitoring data of an instrumented arch bridge", Smart Struct. Syst., 17(6), 1087-1105. https://doi.org/10.12989/sss.2016.17.6.1087
- Zeng, Z.P., He, X.F., Zhao, Y.G., Yu, Z.W., Chen, L.K., Xu, W.T. and Lou, P. (2015), "Random vibration analysis of train-slab track-bridge coupling system under earthquakes", Struct. Eng. Mech., 54(5), 1017-1044. https://doi.org/10.12989/sem.2015.54.5.1017