DOI QR코드

DOI QR Code

A mechanical model of vehicle-slab track coupled system with differential subgrade settlement

  • Guo, Yu (Train and Track Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University) ;
  • Zhai, Wanming (Train and Track Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University) ;
  • Sun, Yu (Train and Track Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University)
  • 투고 : 2017.04.12
  • 심사 : 2018.01.23
  • 발행 : 2018.04.10

초록

Post-construction subgrade settlement especially differential settlement, has become a key issue in construction and operation of non-ballasted track on high-speed railway soil subgrade, which may also affect the dynamic performance of passing trains. To estimate the effect of differential subgrade settlement on the mechanical behaviors of the vehicle-slab track system, a detailed model considering nonlinear subgrade support and initial track state due to track self-weight is developed. Accordingly, analysis aiming at a typical high-speed vehicle coupled with a deteriorated slab track owing to differential subgrade settlement is carried out, in terms of two aspects: (i) determination of an initial mapping relationship between subgrade settlement and track deflections as well as contact state between track and subgrade based on a semi-analytical method; (ii) simulation of dynamic performance of the coupled system by employing a time integration approach. The investigation indicates that subgrade settlement results in additional track irregularity, and locally, the contact between the concrete track and the soil subgrade is prone to failure. Moreover, wheel-rail interaction is significantly exacerbated by the track degradation and abnormal responses occur as a result of the unsupported areas. Distributions of interlaminar contact forces in track system vary dramatically due to the combined effect of track deterioration and dynamic load. These may not only intensify the dynamic responses of the coupled system, but also have impacts on the long-term behavior of the track components.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China (NSFC)

참고문헌

  1. Chen, R., Chen, J., Zhao, X., Bian, X. and Chen, Y. (2014), "Cumulative settlement of track subgrade in high-speed railway under varying water levels", Int. J. Rail Trans., 2(4), 205-220. https://doi.org/10.1080/23248378.2014.959083
  2. Chen, Z., Zhai, W., Cai, C. and Sun, Y. (2015), "Safety threshold of high-speed railway pier settlement based on train-trackbridge dynamic interaction", Sci. Chin. Technol. Sc., 58(2), 202-210. https://doi.org/10.1007/s11431-014-5692-0
  3. Dahlberg, T. (2003), Railway Track Settlements-A Literature Review, Report for the EU Project SUPERTRACK, Division of Solid Mechanics, IKP, Linkoping University, Linkoping, Sweden.
  4. Han, Y.T. and Yao, L. (2007), "Analysis of the dynamic performance for slab track settlement on embankment", J. Railw. Eng. Soc., 10, 28-31.
  5. Kouroussis, G., Connolly, D.P., Alexandrou, G. and Vogiatzis, K. (2015a), "The effect of railway local irregularities on ground vibration", Transp. Res. D-Tr E, 39, 17-30. https://doi.org/10.1016/j.trd.2015.06.001
  6. Kouroussis, G., Connolly, D.P., Alexandrou, G. and Vogiatzis, K. (2015b), "Railway ground vibrations induced by wheel and rail singular defects", Vehic. Syst. Dyn., 53(10), 1500-1519. https://doi.org/10.1080/00423114.2015.1062116
  7. Li, G.H., Xu, Z.L., Sun, S.L. and Jing, Z.D. (2007), "The influence of surface subsidence on construction of high-speed railway in north China plain and its countermeasures", J. Railw. Eng. Soc., 24(8), 7-12.
  8. Li, X., Nielsen, J.C. and Palsson, B.A. (2014), "Simulation of track settlement in railway turnouts", Vehic. Syst. Dyn., 52(sup1), 421-439. https://doi.org/10.1080/00423114.2014.904905
  9. Olivier, B., Connolly, D.P., Costa, P.A. and Kouroussis, G. (2016), "The effect of embankment on high speed rail ground vibrations", Int. J. Rail Transp., 4(4), 229-246. https://doi.org/10.1080/23248378.2016.1220844
  10. Paixao, A., Fortunato, E. and Calcada, R. (2015), "The effect of differential settlements on the dynamic response of the traintrack system: A numerical study", Eng. Struct., 88, 216-224. https://doi.org/10.1016/j.engstruct.2015.01.044
  11. Sadeghi, K. and Nouban, F. (2017), "Behavior modeling and damage quantification of confined concrete under cyclic loading", Struct. Eng. Mech., 61(5), 625-635. https://doi.org/10.12989/sem.2017.61.5.625
  12. Shabana, A.A. and Sany, J.R. (2001), "Asurvey of rail vehicle track simulations and flexible multibody dynamics", Nonlin. Dyn., 26(2), 179-210. https://doi.org/10.1023/A:1012976302105
  13. Varandas, J.N., Holscher, P. and Silva, M.A. (2011), "Dynamic behaviour of railway tracks on transitions zones", Comput. Struct., 89(13), 1468-1479. https://doi.org/10.1016/j.compstruc.2011.02.013
  14. Varandas, J.N., Holscher, P. and Silva, M.A. (2014), "Settlement of ballasted track under traffic loading: Application to transition zones", Proc. IMechE, Part F: J. Rail Rap. Trans., 228(3), 242-259. https://doi.org/10.1177/0954409712471610
  15. Wang, B.L., Yang, X.W., Zhou, Y. and Gong, Q.M. (2015), Subgrade and Track Engineering of High Speed Railway, 1st Edition, Tongji University Press, Shanghai, China.
  16. Xu, Q.Y., Li, B. and Fan, H. (2012), "Influence of differential settlement of subgrade on dynamic characteristic of trainballastless track on subgrade coupling system", J. Railw. Sci. Eng., 9(3), 13-19.
  17. Zeng, J.C., Zhang, J.W., Tong, X.D. and Tu, Y.M. (2009), "Test evaluation of post-construction settlement of subgrade in Beijing-Shanghai high-speed railway", Proceedings of the International Conference on Transportation Engineering, Chengdu, China, July.
  18. Zeng, Z.P., He, X.F., Zhao, Y.G. and Yu, Z.W. (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
  19. Zhai, W.M. (1996), "Two simple fast integration methods for large-scale dynamic problems in engineering", Int. J. Numer. Meth. Eng., 39(24), 4199-4214. https://doi.org/10.1002/(SICI)1097-0207(19961230)39:24<4199::AID-NME39>3.0.CO;2-Y
  20. Zhai, W.M. (2015), Vehicle-Track Coupled Dynamics, 4th Edition, Science Press, Beijing, China.
  21. Zhai, W., Liu, P. and Lin, J. (2015), "Experimental investigation on vibration behaviour of a CRH train at speed of 350 km/h", Int. J. Rail Trans., 3(1), 1-16. https://doi.org/10.1080/23248378.2014.992819
  22. Zhai, W., Wang, K. and Cai, C. (2009), "Fundamentals of vehicletrack coupled dynamics", Vehic. Syst. Dyn., 47(11), 1349-1376. https://doi.org/10.1080/00423110802621561
  23. Zhang, X.H., Burrow, M. and Zhou, S.H. (2016), "An investigation of subgrade differential settlement on the dynamic response of the vehicle-track system", Proc. IMechE, Part F: J. Rail Rap. Transit, 230(7), 1760-1773. https://doi.org/10.1177/0954409715613538
  24. Zhu, J.J., Ahmed, A.K.W., Rakheja, S. and Khajepour, A. (2010), "Development of a vehicle-track model assembly and numerical method for simulation of wheel-rail dynamic interaction due to unsupported sleepers", Vehicl. Syst. Dyn., 48(12), 1535-1552. https://doi.org/10.1080/00423110903540751
  25. Zou, C.H., Zhou, S.H. and Wang, B.L. (2011), "Model test study of influence of differential subgrade settlement on ballasted track settlement", J. Tongji Univ., 39(6), 862-869.

피인용 문헌

  1. Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer vol.14, pp.21, 2018, https://doi.org/10.3390/ma14216653
  2. Experimental and Numerical Verification of the Railway Track Substructure with Innovative Thermal Insulation Materials vol.15, pp.1, 2018, https://doi.org/10.3390/ma15010160