DOI QR코드

DOI QR Code

Reliability of mortar filling layer void length in in-service ballastless track-bridge system of HSR

  • Binbin He (School of Civil Engineering and Architecture, East China Jiaotong University) ;
  • Sheng Wen (School of Civil Engineering and Architecture, East China Jiaotong University) ;
  • Yulin Feng (School of Civil Engineering and Architecture, East China Jiaotong University) ;
  • Lizhong Jiang (Central South University, National Engineering Research Center of High-speed Railway Construction Technology) ;
  • Wangbao Zhou (Central South University, National Engineering Research Center of High-speed Railway Construction Technology)
  • 투고 : 2022.10.25
  • 심사 : 2023.03.16
  • 발행 : 2023.04.10

초록

To study the evaluation standard and control limit of mortar filling layer void length, in this paper, the train sub-model was developed by MATLAB and the track-bridge sub-model considering the mortar filling layer void was established by ANSYS. The two sub-models were assembled into a train-track-bridge coupling dynamic model through the wheel-rail contact relationship, and the validity was corroborated by the coupling dynamic model with the literature model. Considering the randomness of fastening stiffness, mortar elastic modulus, length of mortar filling layer void, and pier settlement, the test points were designed by the Box-Behnken method based on Design-Expert software. The coupled dynamic model was calculated, and the support vector regression (SVR) nonlinear mapping model of the wheel-rail system was established. The learning, prediction, and verification were carried out. Finally, the reliable probability of the amplification coefficient distribution of the response index of the train and structure in different ranges was obtained based on the SVR nonlinear mapping model and Latin hypercube sampling method. The limit of the length of the mortar filling layer void was, thus, obtained. The results show that the SVR nonlinear mapping model developed in this paper has a high fitting accuracy of 0.993, and the computational efficiency is significantly improved by 99.86%. It can be used to calculate the dynamic response of the wheel-rail system. The length of the mortar filling layer void significantly affects the wheel-rail vertical force, wheel weight load reduction ratio, rail vertical displacement, and track plate vertical displacement. The dynamic response of the track structure has a more significant effect on the limit value of the length of the mortar filling layer void than the dynamic response of the vehicle, and the rail vertical displacement is the most obvious. At 250 km/h - 350 km/h train running speed, the limit values of grade I, II, and III of the lengths of the mortar filling layer void are 3.932 m, 4.337 m, and 4.766 m, respectively. The results can provide some reference for the long-term service performance reliability of the ballastless track-bridge system of HRS.

키워드

과제정보

This work was supported by the National Natural Science Foundation of China (52268074, 52078487), the Fellowship of China Postdoctoral Science Foundation (Grant 2022M713544), the State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure (HJGZ20212009, HJGZ2021211), and Jiangxi Provincial Natural Science Foundation (20224BAB214073).

참고문헌

  1. Ando, K., Sunaga, M., Aoki, H. and Haga, O. (2001), "Development of slab tracks for hokuriku shinkansen line", Quart. Report RTRI., 42(1), 35-41. https://doi.org/10.2219/rtriqr.42.35.
  2. Chen, Z. (2021), "Dynamic contact behavior between longitudinal slab track and bridge deck under pier settlement and its influence on train dynamic characteristics", China Civil Eng. J., 54(1), 97-105.
  3. Cho, T., Song, M. and Lee, D.H. (2010), "Reliability analysis for the uncertainties in vehicle and high-speed railway bridge system based on an improved response surface method for nonlinear limit states", Nonlinear Dyn., 59(1-2), 1-17. https://doi.org/10.1007/s11071-009-9521-0.
  4. Feng, Q., Sun, K. and Chen, H.P. (2021), "Reliability-based assessment of high-speed railway subgrade defect", Struct. Eng. Mech., 77(2), 231-243. https://doi.org/10.12989/sem.2021.77.2.231.
  5. Feng, Y., Hou, Y., Jiang, L., Chen, M., Feng, Q. and Zhou, W. (2023), "Analytical characterization of deformation accumulation and stiffness mutation of key components of ballastless track-bridge system induced by foundation deformation", China Civil Eng. J., 56(3), 44-57
  6. Gao, J. and Jin, Z. (2022), "Damage identification of mortar layer of ballastless track of high-speed railway based on BP neural network", J. China Railway Soc., 44(7), 135-144.
  7. Han, J., Zhao, G., Xiao, X. and Jin, X. (2018), "Effect of cement asphalt mortar damage location on dynamic behavior of high-speed track", Adv. Mech. Eng., 10(4), https://doi.org/10.1177/1687814018770779.
  8. Huang, J. and Long, X. (2019), "Reliability analysis considering spatial variability by combining spectral representation method and support vector machine", Eur. J. Environ. Civ. Eng., 25(6), 1136-1157. https://doi.org/10.1080/19648189.2019.1570871.
  9. Jin, S. and Feng, H.D. (2020), "Reliability assessment of a curved heavy-haul railway track-bridge system", Struct. Infrastruct. E., 16(3), 465-480. https://doi.org/10.1080/15732479.2019.1668435.
  10. Lai, M.H., Binhowimal, S.A.M., Hanzic, L., Wang, Q. and Ho, J.C.M. (2020a), "Dilatancy mitigation of cement powder paste by pozzolanic and inert fillers", Struct. Concrete., 21(3), 1164-1180. https://doi.org/10.1002/suco.201900320.
  11. Lai, M.H., Binhowimal, S.A.M., Hanzic, L., Wang, Q. and Ho, J.C.M. (2020b), "Cause and mitigation of dilatancy in cement powder paste", Constr. Build. Mater., 236, 117595. https://doi.org/10.1016/j.conbuildmat.2019.117595.
  12. Lai, M.H., Lao, W.C., Tang, W.K., Hanzic, L., Wang, Q. and Ho, J.C.M. (2023), "Dilatancy swerve in superplasticized cement powder paste", Constr. Build. Mater., 362, 129524. https://doi.org/10.1016/j.conbuildmat.2022.129524.
  13. Lai, M.H., Griffith, A.M., Hanzic, L., Wang, Q. and Ho, J.C.M. (2021), "Interdependence of passing ability, dilatancy and wet packing density of concrete", Constr. Build. Mater, 270, 121440. https://doi.org/10.1016/j.conbuildmat.2020.121440.
  14. Li, Z.W., Liu, X.Z. and Chen, S.X. (2022), "A reliability assessment approach for slab track structure based on vehicle-track dynamics and surrogate model", P. I. Mech. Eng. O-J. Ris., 236(1), 79-89. https://doi.org/10.1177/1748006X211028405.
  15. Liu, D., Liu, Y.F., Ren, J.J., Yang, R.S. and Liu, X.Y. (2016), "Contact loss beneath track slab caused by deteriorated cement emulsified asphalt mortar: Dynamic characteristics of vehicle-slab track system and prototype experiment", Math. Probl. Eng., 2016, 1-12. https://doi.org/10.1155/2016/3073784.
  16. Liu, L., Zuo, Z., Zhou, Q., Qin, J. and Liu, Q. (2020), "Study on vibration energy characteristics of vehicle-track-viaduct coupling system considering partial contact loss beneath track slab", Struct. Eng. Mech., 75(4), 497-506. https://doi.org/10.12989/sem.2020.75.4.497.
  17. Mohammadzadeh, S., Sharavi, M. and Keshavarzian, H. (2013), "Reliability analysis of fatigue crack initiation of railhead in bolted rail joint", Eng. Fail. Anal., 29, 132-148. https://doi.org/10.1016/j.engfailanal.2012.11.012.
  18. Pan, P., Lei, X., Zhang, P., Wu, S. and Gui, H. (2017), "Dynamic response analysis of ballastless track on bridge under braking load", J. Railway Sci. Eng., 14(11), 2309-2322.
  19. Park, S., Lim, Y. and Lim, N. (2019), "On-site applicability evaluation of concrete track defect measurement system for inspection of gaps and abnormalities of concrete slab in railway track", J. Korean Soc. Railway, 22(9), 719-729. https://doi.org/10.7782/jksr.2019.22.9.719.
  20. Rajashekhar, M. and Ellingwood, Bruce. (1993), "A new look at the response surface approach for reliability analysis", Struct. Saf., 12(3), 205-220. https://doi.org/10.1016/0167-4730(93)90003-J.
  21. Ren, J., Li, X., Yang, R., Wang, P. and Xie, P. (2016), "Criteria for repairing damages of CA mortar for prefabricated framework-type slab track", Constr. Build. Mater., 110(9), 300-311. https://doi.org/110. 10.1016/j.conbuildmat.2016.02.036.
  22. Rutherford, T., Wang, Z., Shu, X., Huang, B. and Clarke, D. (2014) "Laboratory investigation into mechanical properties of cement emulsified asphalt mortar", Constr. Build. Mater., 65, 76-83. https://doi.org/ 10.1016/j.conbuildmat.2014.04.113.
  23. Shi, H., Yu, Z., Shi, H. and Zhu, L. (2019), "Recognition algorithm for the disengagement of cement asphalt mortar based on dynamic responses of vehicles", P. I. Mech. Eng. F-J. RAI. 233(3), 270-282. https://doi.org/10.1177/0954409718794018.
  24. Steenbergen, M., Metrikine, A. and Esveld, C. (2007), "Assessment of design parameters of a slab track railway system from a dynamic viewpoint", J. Sound Vib., 306(1-2), 361-371. https://doi.org/10.1016/j.jsv.2007.05.034.
  25. Su, M., Xie, H., Kang, C. and Li, S. (2021), "Determination of the interfacial properties of longitudinal continuous slab track via a field test and ANN-based approaches", Eng. Struct., 246(21), https://doi.org/10.1016/J.ENGSTRUCT.2021.113039.
  26. Sun, K. (2019), Study on the Disease Characteristics of Ballastless Track of High-Speed Railway and its Influence on Traffic Safety and Quality, Ph.D. Dissertation, East China Jiaotong University, Nanchang.
  27. Wang, P., Xu, H. and Chen, R. (2014), "Effect of cement asphalt mortar debonding on dynamic properties of CRTS II slab ballastless track", Adv. Mater. Sci. Eng., 2014, 1-8. https://doi.org/10.1155/2014/193128.
  28. Zhang, G., Feng, W., Wu, M., Shao, H. and Ma, F. (2021), "Reservoir bank slope stability prediction model based on BP neural network", Steel Compos. Struct., 41(2), https://doi.org/10.12989/scs.2021.41.2.237.
  29. Zhu, S. (2015), Damage Behavior of Ballastless Track Structure of High-Speed Railway and its Influence on Dynamic Performance, Ph.D. Dissertation, Southwest Jiaotong University, Chengdu.