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Monitoring in-service performance of fibre-reinforced foamed urethane sleepers/bearers in railway urban turnout systems

  • 투고 : 2014.01.07
  • 심사 : 2014.03.19
  • 발행 : 2014.03.25

초록

Special track systems used to divert a train to other directions or other tracks are generally called 'railway turnout'. A traditional turnout system consists of steel rails, switches, crossings, steel plates, fasteners, screw spikes, timber bearers, ballast and formation. The wheel rail contact over the crossing transfer zone has a dip-like shape and can often cause detrimental impact loads on the railway track and its components. The large impact also emits disturbing noises (either impact or ground-borne noise) to railway neighbors. In a brown-field railway track where an existing aged infrastructure requires renewal or maintenance, some physical constraints and construction complexities may dominate the choice of track forms or certain components. With the difficulty to seek for high-quality timbers with dimensional stability, a methodology to replace aged timber bearers in harsh dynamic environments is to adopt an alternative material that could mimic responses and characteristics of timber in both static and dynamic loading conditions. A critical review has suggested an application of an alternative material called fibre-reinforced foamed urethane (FFU). The full-scale capacity design makes use of its comparable engineering characteristics to timber, high-impact attenuation, high damping property, and a longer service life. A field trial to investigate in-situ behaviours of a turnout grillage system using an alternative material, 'fibre-reinforced foamed urethane (FFU)' bearers, has been carried out at a complex turnout junction under heavy mixed traffics at Hornsby, New South Wales, Australia. The turnout junction was renewed using the FFU bearers altogether with new special track components. Influences of the FFU bearers on track geometry (recorded by track inspection vehicle 'AK Car'), track settlement (based on survey data), track dynamics, and acoustic characteristics have been measured. Operational train pass-by measurements have been analysed to evaluate the effectiveness of the replacement methodology. Comparative studies show that the use of FFU bearers generates higher rail and sleeper accelerations but the damping capacity of the FFU help suppress vibration transferring onto other track components. The survey data analysis suggests a small vertical settlement and negligible lateral movement of the turnout system. The static and dynamic behaviours of FFU bearers appear to equate that of natural timber but its service life is superior.

키워드

참고문헌

  1. Andersson, C. and Dahlberg, T. (2003), "Wheel/rail impacts at a railway turnout crossing", Proc. Inst. Mech. Engineers Part F: J. Rail Rapid Transit, 212F, 135-146.
  2. Awad, Z.K. and Yusaf, T. (2012), "Fibre composite railway sleeper design by using FE approach and optimization techniques", Struct. Eng. Mech., 41(2), 231-242. https://doi.org/10.12989/sem.2012.41.2.231
  3. Cai, X.P., Qiu, J.S. and Liu, H.Q. (2013), "Dynamic properties of high-speed turnouts under foundation settlement", Adv. Mater. Res., 671-674, 1174-1178. https://doi.org/10.4028/www.scientific.net/AMR.671-674.1174
  4. Jenkins, H.H., Stephenson, J.E., Clayton, G.A., Morland, J.W. and Lyon, D. (1974), "The effect of track and vehicle parameters on wheel/rail vertical dynamic forces", Railway Eng. J., 2-16.
  5. Kaewunruen, S. (2009), Review of alternative fibre-reinforced foamed urethane (FFU) material for timber-replacement turnout bearers, Technical Report TR162, RailCorp - Track Engineering, Sydney NSW.
  6. Kaewunruen, S. (2011), In-situ performance of alternative fibre-reinforced foamed urethane (FFU) material for timber-replacement turnout bearers, Technical Report TR188, RailCorp - Track Engineering, Sydney NSW.
  7. Kaewunruen, S. (2012), Vertical and lateral stability performance of alternative fibre-reinforced foamed urethane (FFU) material for timber-replacement turnout bearers, Technical Report TR197, RailCorp - Track Engineering, Sydney NSW.
  8. Kaewunruen, S. (2012), Effectiveness of using elastomeric pads to mitigate impact vibration at an urban turnout crossing, in (Eds.Maeda et al.), Noise and Vibration Mitigation for Rail Transportation Systems, Springer.
  9. Kaewunruen, S. (2013a), "Acoustic and dynamic characteristics of a complex urban turnout using fibre-reinforced foamed urethane (FFU) bearers", Proceedings of the 2013 International Workshop on Railway Noise, 9th-13th September 2013, Uddevalla, Sweden.
  10. Kaewunruen, S. (2013b), "In situ performance of a complex urban turnout grillage system using fibre-reinforced foamed urethane (FFU) bearers", Proceedings of the 10th World Congress on Rail Research, 25th-28th November 2013, Sydney Convention Centre, Australia
  11. Kaewunruen, S. and Remennikov, A.M. (2009a), "Dynamic flexural influence on a railway concrete sleeper in track system due to a single wheel impact", Eng. Fail. Anal., 16(3), 705-712. https://doi.org/10.1016/j.engfailanal.2008.06.002
  12. Kaewunruen, S. and Remennikov, A.M. (2009b), "Progressive failure of prestressed concrete sleepers under multiple high-intensity impact loads", Eng. Struct., 31(10), 2460-2473. https://doi.org/10.1016/j.engstruct.2009.06.002
  13. Kaewunruen, S. and Remennikov, A.M. (2010), "Dynamic properties of railway track and its components: recent findings and future research direction", Insight: Non-Destructive Test. Condition Monit., 52(1), 20-22. https://doi.org/10.1784/insi.2010.52.1.20
  14. Kaewunruen, S., Remennikov, A.M. and Murray, M.H. (2011a), "Greener & Leaner: Unleashing the capacity of railroad concrete ties", J. Transport. Eng. - ASCE, 137(4), 241-247. https://doi.org/10.1061/(ASCE)TE.1943-5436.0000215
  15. Kaewunruen, S., Remennikov, A.M. and Murray, M.H. (2011b), "Limit states design of concrete sleepers", ICE Transport, 165(TR2), 81-85.
  16. Kaewunruen, S. and Remennikov, A.M. (2013), "On the residual energy toughness of prestressed concrete sleepers in railway track structures subjected to repeated impact loads", Electron. J. Struct. Eng., 13(1), 41-61 (invited).
  17. Pacific Real Time (2009), ROAMES Operator Training Manuals, Sydney, Australia
  18. RailCorp (2011), Noise and Vibration Unit Technical Report TR NV 20111006 ESR FFU TRIAL: Track Dynamic Properties - ESR Woolloomooloo Viaduct UP TRACK, October 2011, Sydney, Australia.
  19. RailCorp (2012a), SPC231 Timber sleepers and bearers, Engineering Specification SPC 231, Sydney Australia.
  20. RailCorp (2012b), Rolling Stock Engineering: Minimum Operating Standards for Rolling Stocks, Sydney, Australia.
  21. RailCorp (2012c), SPC233 Turnout concrete bearers, Engineering Specification SPC 233, Sydney Australia.
  22. RailCorp (2012d), Engineering Standards: Track Engineering, Sydney, Australia, [URL http://engintranet.railcorp.nsw.gov.au/Civil_EngineeringStandards.asp]
  23. Railtrack PLC (2002), RT/CE/S/012 Specification of Cast Austentic Manganese Steel Crossings, Railtrack PLC, February.
  24. Rama, D. and Andrews, J.D. (2013), "A reliability analysis of railway switches", Proc. Inst. Mech. Engineers Part F: J. Rail Rapid Transit, 227(4), 344-363. https://doi.org/10.1177/0954409713481725
  25. Real, J.I., Sanchez, M.E., Real, T., Sanchez, F.J. and Zamorano, C. (2012), "Experimental modal analysis of railway concrete sleepers with cracks", Struct. Eng. Mech., 44(1), 51-60. https://doi.org/10.12989/sem.2012.44.1.051
  26. Remennikov, A.M. and Kaewunruen, S. (2008), "A review of loading conditions for railway track structures due to train and track vertical interaction", Struct. Control Health Monit., 15(2), 207-234. https://doi.org/10.1002/stc.227
  27. Remennikov, A.M., Murray, M.H. and Kaewunruen, S. (2012), "Reliability based conversion of a structural design code for prestressed concrete sleepers", Proc. Inst. Mech Engineers Part F: J. Rail Rapid Transit, 226(2), 155-173. https://doi.org/10.1177/0954409711418754
  28. Sekisui Co. (2012), Technical Report - Engineering Properties of FFU materials, Tokyo Japan.
  29. Standards Australia (2001), Railway Track Timbers. Australian Standards: AS3818.2 Timber, Sydney Australia.
  30. Standards Australia (2003), AS1085.14 Prestressed concrete sleepers, Sydney Australia.
  31. Thompson, D.J. (2010), Railway Noise and Vibration. Elsevier, Amsterdam, The Netherlands.
  32. Wu, T.X. and Thompson, D.J. (2003), On the impact noise generation due to a wheel passing over rail joints, J. Sound Vib., 267(3), 485-496. https://doi.org/10.1016/S0022-460X(03)00709-0
  33. Xiao, J., Zhang, F. and Qian, L. (2011), "Numerical simulation of stress and deformation in a railway crossing", Eng. Fail. Anal., 18(8), 2296-2304. https://doi.org/10.1016/j.engfailanal.2011.08.006

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  1. Current state of practice in railway track vibration isolation: an Australian overview vol.14, pp.1, 2016, https://doi.org/10.1080/14488353.2015.1116364
  2. In Situ Monitoring of Rail Squats in Three Dimensions Using Ultrasonic Technique vol.40, pp.4, 2016, https://doi.org/10.1007/s40799-016-0124-7
  3. Lifecycle Assessments of Railway Bridge Transitions Exposed to Extreme Climate Events vol.3, 2017, https://doi.org/10.3389/fbuil.2017.00035
  4. Comparison of structural design methods for railway composites and plastic sleepers and bearers vol.18, pp.3, 2017, https://doi.org/10.1080/13287982.2017.1382045
  5. Nonlinear Finite Element Modelling of Railway Turnout System considering Bearer/Sleeper-Ballast Interaction vol.2015, 2015, https://doi.org/10.1155/2015/598562
  6. Torsional Effect on Track-Support Structures of Railway Turnouts Crossing Impact vol.143, pp.2, 2017, https://doi.org/10.1061/JTEPBS.0000004
  7. Normalised curvature square ratio for detection of ballast voids and pockets under rail track sleepers vol.1106, pp.1742-6596, 2018, https://doi.org/10.1088/1742-6596/1106/1/012002
  8. Vulnerability of Structural Concrete to Extreme Climate Variances vol.6, pp.2, 2018, https://doi.org/10.3390/cli6020040
  9. Effect of Extreme Climate on Topology of Railway Prestressed Concrete Sleepers vol.7, pp.1, 2019, https://doi.org/10.3390/cli7010017
  10. Free vibrations of precast modular steel-concrete composite railway track slabs vol.24, pp.1, 2014, https://doi.org/10.12989/scs.2017.24.1.113
  11. Damped frequencies of precast modular steel-concrete composite railway track slabs vol.25, pp.4, 2017, https://doi.org/10.12989/scs.2017.25.4.427
  12. Dynamic Performance of Concrete Turnout Bearers and Sleepers in Railway Switches and Crossings vol.7, pp.3, 2014, https://doi.org/10.1520/acem20170103
  13. Idealisations of Dynamic Modelling for Railway Ballast in Flood Conditions vol.9, pp.9, 2014, https://doi.org/10.3390/app9091785
  14. New Insights from Multibody Dynamic Analyses of a Turnout System under Impact Loads vol.9, pp.19, 2014, https://doi.org/10.3390/app9194080
  15. On Hogging Bending Test Specifications of Railway Composite Sleepers and Bearers vol.6, pp.None, 2014, https://doi.org/10.3389/fbuil.2020.592014
  16. Briefing: Dynamic mode couplings of railway composite track slabs vol.173, pp.2, 2014, https://doi.org/10.1680/jstbu.17.00193
  17. The Effect of Unsupported Sleepers/Bearers on Dynamic Phenomena of a Railway Turnout System under Impact Loads vol.10, pp.7, 2014, https://doi.org/10.3390/app10072320
  18. Behaviour of timber-alternative railway sleeper materials under five-point bending vol.316, pp.None, 2022, https://doi.org/10.1016/j.conbuildmat.2021.125882
  19. Improving the Mechanical Performance of Timber Railway Sleepers with Carbon Fabric Reinforcement: An Experimental and Numerical Study vol.26, pp.1, 2014, https://doi.org/10.1061/(asce)cc.1943-5614.0001178