Aikawa, Akira

Kaewunruen, Sakdirat

Remennikov, Alex M.

English

For over 60 years, railway concrete sleepers have been installed in ballasted railway tracks globally. Their key duties are to help redistribute wheel loads onto track structure and to secure a stable track gauge for safe running of trains and rolling stocks. In practice, railway sleepers experience dynamic loading conditions; however, its damping characteristic has not been considered because very little damping can be exploited in concrete and steel. To be able to cater heavier and faster trains, the dynamic and impact loading conditions cannot be underestimated. Statistically, almost a quarter to track load spectra is typically of transience and high intensity. Pre-mature damage or failure of track components can take place at a faster rate when the damping is very low. A single sleeper failure may not affect open, plain track operations but it can give rise to the risks of rail breaks at rail joints, welds, bridge ends, switches and crossings, curved track, etc. Such the risks can later result in detrimental train derailments. This is thus very important to consider the failure of sleepers in a case by case basis that is suitable for the track type, track condition and level of maintenance and operations. This paper will highlight the influence of damping on the dynamic impact responses of railway concrete sleepers in a track system. An established and validated finite element model of sleeper has been utilised in this study. The model has been validated by experimental results. The insight into the impact vibration suppression of railway sleepers will help track engineers to decide the better choice of advanced materials for manufacturing railway concrete sleepers

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  University of BirminghamInfluence of concrete damping on impact vibrationsof railway prestressed concrete sleepersKaewunruen, Sakdirat; Aikawa, Akira; Remennikov, Alex M.License:Creative Commons: Attribution (CC BY)Document VersionPeer reviewed versionCitation for published version (Harvard):Kaewunruen, S, Aikawa, A & Remennikov, AM 2019, Influence of concrete damping on impact vibrations ofrailway prestressed concrete sleepers. in The 7th Asia-Pacific Congress on Computational Mechanics, Taipei,Taiwan., 0419, The 7th Asia-Pacific Congress on Computational Mechanics, Taipei, Taiwan, Province of China,17/12/19.Link to publication on Research at Birmingham portalGeneral rightsUnless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or thecopyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposespermitted by law.•	Users may freely distribute the URL that is used to identify this publication.•	Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of privatestudy or non-commercial research.•	User may use extracts from the document in line with the concept of ‘fair dealing’ under the Copyright, Designs and Patents Act 1988 (?)•	Users may not further distribute the material nor use it for the purposes of commercial gain.Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document.When citing, please reference the published version.Take down policyWhile the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has beenuploaded in error or has been deemed to be commercially or otherwise sensitive.If you believe that this is the case for this document, please contact UBIRA@lists.bham.ac.uk providing details and we will remove access tothe work immediately and investigate.Download date: 01. Mar. 2020Influence of concrete damping on impact vibrations of railway prestressed concrete sleepers Sakdirat Kaewunruen 1 , Akira Aikawa 2, Ruilin You 3 1 Birmingham Centre for Railway Research and Education, The University of Birmingham, Birmingham, U.K 2 Railway Dynamics Division, Railway Technical Research Institute, Tokyo, Japan 3 Railway Engineering Institute, China Academy of Railway Sciences, Beijing, China s.kaewunruen@bham.ac.uk Abstract. For over 60 years, railway concrete sleepers have been installed in ballasted railway tracks globally. Their key duties are to help redistribute wheel loads onto track structure and to secure a stable track gauge for safe running of trains and rolling stocks. In practice, railway sleepers experience dynamic loading conditions; however, its damping characteristic has not been considered because very little damping can be exploited in concrete and steel. To be able to cater heavier and faster trains, the dynamic and impact loading conditions cannot be underestimated. Statistically, almost a quarter to track load spectra is typically of transience and high intensity. Pre-mature damage or failure of track components can take place at a faster rate when the damping is very low. A single sleeper failure may not affect open, plain track operations but it can give rise to the risks of rail breaks at rail joints, welds, bridge ends, switches and crossings, curved track, etc. Such the risks can later result in detrimental train derailments. This is thus very important to consider the failure of sleepers in a case by case basis that is suitable for the track type, track condition and level of maintenance and operations. This paper will highlight the influence of damping on the dynamic impact responses of railway concrete sleepers in a track system. An established and validated finite element model of sleeper has been utilised in this study. The model has been validated by experimental results. The insight into the impact vibration suppression of railway sleepers will help track engineers to decide the better choice of advanced materials for manufacturing railway concrete sleepers.    Keywords: damping; concrete sleepers; impact vibration; railway tracks  Acknowledgments: The corresponding author wishes to gratefully acknowledge the Japan Society for Promotion of Science (JSPS) for his JSPS Invitation Research Fellowship (Long-term), Grant No L15701, at the Track Dynamics Laboratory, Railway Technical Research Institute and at Concrete Laboratory, the University of Tokyo, Tokyo, Japan. The JSPS financially supports this work as part of the research project, entitled “Smart and reliable railway infrastructure.” Special thanks to European Commission for H2020-MSCA-RISE Project No. 691135 “RISEN: Rail Infrastructure Systems Engineering Net-work” (www.risen2rail.eu). Partial support from H2020 Shift2Rail Project No 730849 (S-Code) is acknowledged. In addition, the sponsorships and assistance from LORAM, Network Rail, RSSB (Rail Safety and Standard Board, UK) are highly appreciated. References: Kaewunruen, S. Monitoring structural deterioration of railway turnout systems via dynamic wheel/rail interaction. Case Stud. Nondestruct. Test. Eval. 2014, 1, 19–24. doi:10.1016/j.csndt.2014.03.004. Kaewunruen, S.; Remennikov, A.M. Progressive failure of prestressed concrete sleepers under multiple high-intensity impact loads. Eng. Struct. 2009, 31, 2460–2473. doi:10.1016/j.engstruct.2009.06.002. Kaewunruen, S.; Remennikov, A.M. Non-destructive testing (NDT): a tool for dynamic health monitoring of railway track structures, Materials Australia, 2006, 39 (6), 14-16. Kaewunruen, S.; Remennikov, A.M.; Murray, M.H. Introducing a new limit states design concept to railway concrete sleepers: An Australian experience. Front. Mat. 2014, 1, 8. doi:10.3389/fmats.2014.00008 Kaewunruen, S.; Sussman, J.M.; Matsumoto, A. Grand challenges in transportation and transit systems. Front. Built Environ. 2016, 2, 4. doi:10.3389/fbuil.2016.00004 Kaewunruen S, Kahawatta Gamage E, Remennikov AM. Modelling railway prestressed concrete sleepers (crossties) with holes and web openings, 2016, International Conference on Railway Engineering, 1240. Kaewunruen, S.; Remennikov, A.M. Impact responses of prestressing tendons in railway concrete sleepers in high speed rail environments, Proceedings of the 5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Crete Island, Greece, 2015. Kaewunruen S, Lopes LMC, Papaelias MP, Georisks in railway systems under climate uncertainties by different types of sleeper/crosstie materials, 2018, Lowland Technology International 20 (1, June), 77-86. Kaewunruen S, Li D, Remennikov AM, Ishida T, Dynamic resistance and rational design of railway prestressed concrete sleepers, Federation Internationale du Beton (fib) - International Federation for Structural Concrete, 2019, 1477-1484. Ngamkhanong, C & Kaewunruen, S 2018, Influence of prestress losses on the dynamic over static capacity ratios of railway concrete sleepers. in SynerCrete’18 International Conference on Interdisciplinary Approaches. RILEM Publications S.A.R.L., Paris France, pp. 925-930. Remennikov, A.M. ; Kaewunruen, S. Experimental load rating of aged railway concrete sleepers. Eng. Struct. 2014, 76, 147-162. Sengsri P, Ngamkhanong C, Kaewunruen S, Life cycle and sustainability assessment of under sleeper pads for railway vibration suppression, 2019, Proceedings of the Institute of Acoustics 41, 357-364. You R, Kaewunruen S, Evaluation of remaining fatigue life of concrete sleeper based on field loading conditions, 2019, Engineering Failure Analysis 105, 70-86.          

Influence of concrete damping on impact vibrations of railway prestressed concrete sleepers

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Influence of concrete damping on impact vibrations of railway prestressed concrete sleepers

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