Abstract
The standard approach for modeling railway tracks idealizes the rails as two infinite beams, each supported over a separate continuous spring foundation. The foundation is characterized by a track modulus that embodies all components and materials underlying each rail as well as any cross-rail interaction. Track modulus is considered a basic parameter governing the field performance of tracks. Therefore, a priori determination of track modulus is needed in design of traditional railways, as well as in evaluating the performance-potential of non-traditional track solutions. In this study, a new method was suggested for a priori track modulus determination based on elastic solutions. Specifically sought were closed-form analytical formulations that could be representative and tractable. In this connection, a 3-D track model was developed, wherein: rail-pads were considered as linear springs, sleepers as finite beams, and all underlying soil-like materials as a homogenous half-space. Ultimately, track modulus was determined by linking calculations in the 3-D model and the standard model. This was done by requiring equal maximal displacement as well as identical load distribution along the rail under the weight of a single railcar axle. The method was illustrated considering a wide set of values for the different model parameters. The calculated results are comparable in magnitudes and exhibit similar sensitivities to the input parameters as reported in field studies or as derived from elaborate numerical schemes.
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References
Adegoke CW, Chang CS, Selig ET (1979) Study of analytical models for track support systems. Transportation Research Record 733:2–20
AREMA Manual (2006) AREMA manual. American Railway Engineering and Maintenance-of-Way Association, Lanham, MD, USA
Barden L (1962) Distribution of contact pressure under foundations. Géotechnique 12(3):181–198, DOI: https://doi.org/10.1680/geot.1962.12.3.181
Biot MA (1937) Bending of infinite beam on elastic foundation. Journal of Applied Mechanics 4(1):1–7
Bose T, Levenberg E, Zania V (2018) Analyzing track responses to train braking. Proceedings of the Institution of Mechanical Engineers Part F: Journal of Rail and Rapid Transit, 232(7):1984–1993, DOI: https://doi.org/10.1177/0954409718761242
Burmister DM (1945a) The general theory of stresses and displacements in layered systems I. Journal of Applied Physics 16(2):89–94, DOI: https://doi.org/10.1063/1.1707558
Burmister DM (1945b) The general theory of stresses and displacementsin layered soil systems II. Journal of Applied Physics 16(3):126–127, DOI: https://doi.org/10.1063/1.1707562
Burmister DM (1945c) The general theory of stresses and displacements in layered soil systems III. Journal of Applied Physics 16(5):296–302, DOI: https://doi.org/10.1063/1.1707590
Cai Z, Raymond GP, Bathurst RJ (1994) Estimate of static track modulus using elastic foundation models. Transportation Research Record 1470:65–72
Chang CS, Adegoke CW, Selig ET (1980) GEOTRACK model for railroad track performance. Journal of the Geotechnical Engineering Division 106(11):1201–1218
Daloglu AT, Vallabhan CVG (2000) Values of k for slab on winkler foundation. Journal of Geotechnical and Geoenvironmental Engineering 126(5):463–471, DOI: https://doi.org/10.1061/(ASCE)1090-0241(2000)126:5(463)
Ebersöhn W, Trevizo MC, Selig ET (1993) Effect of low track modulus on track performance. In: Proceedings of the Fifth International Heavy Haul Conference, International Heavy Haul Association, Beijing, China
Galin LA (1943) On the winkler-zimmermann hypothesis for beams. Journal of Applied Mathematics and Mechanics 7(4):293–300
Hay WW (1982) Railroad engineering. John Wiley & Sons, Inc., Hoboken, NJ, USA
Hemsley JA (2000) Design applications of raft foundations. Thomas Telford Ltd., London, UK
Ioannides AM (2006) Concrete pavement analysis: The first eighty years. International Journal of Pavement Engineering 7(4):233–249, DOI: https://doi.org/10.1080/10298430600798481
Kerr AD (2000) On the determination of the rail support modulus k. International Journal of Solids and Structures 37:4335–4351, DOI: https://doi.org/10.1016/S0020-7683(99)00151-1
Kerr AD (2003) Fundamentals of railway track engineering. Simmons-Boardman Books Inc., Omaha, NE, USA
Khazanovich L, Tayabji SD, Darter MI (2001) Backcalculation of layer parameters for LTPP test sections, volume I: Slab on elastic solid and slab on dense-liquid foundation analysis of rigid pavements. Technical Report No. FHWA-RD-00-086, FHWA, McLean, VA, USA
Klar A, Vorster TEB, Soga K, Mair RJ (2005) Soil-pipe interaction due to tunnelling: Comparison between winkler and elastic continuum solutions. Géotechnique 55(6):461–466, DOI: https://doi.org/10.1680/geot.2005.55.6.461
Lee KM, Hou XY, Ge XW, Tang Y (2001) An analytical solution for a jointed shield-driven tunnel lining. International Journal of Numerical and Analytical Methods in Geomechanics 25:365–390, DOI: https://doi.org/10.1002/nag.134
Lu S, Arnold R, Farritor S, Fateh M, Carr G (2008) On the relationship between load and deflection in railroad track structure. Proceedings of the AREMA 2008 annual conference, September 21-24, Salt Lake City, UT, USA
Mair RJ (2008) Tunnelling and geotechnics: New horizons. Geotechnique 58(9):695–736, DOI: https://doi.org/10.1680/geot.2008.58.9.695
Mishra D, Sharma S, Shrestha A, Li D, Basye C (2016) GEOTRACK-2015: An upgraded software tool for railroad track analysis. Joint rail conference american society of mechanical engineers, March 23-26, San Jose, CA, USA
Nafari SF, Gül M, Cheng JR (2017) Quantifying live bending moments in rail using train-mounted vertical track deflection measurements and track modulus estimations. Journal of Civil Structural Health Monitoring 7(5):637–643, DOI: https://doi.org/10.1007/s13349-017-0248-1
Narayanan RM, Jakub JW, Li D, Elias SE (2004) Railroad track modulus estimation using ground penetrating radar measurements. NDT & E International 37(2):141–151, DOI: https://doi.org/10.1016/j.ndteint.2003.05.003
Newton SG, Clark RA (1979) An investigation into the dynamic effects on the track of wheelflats on railway vehicles. Journal of MechanicalEngineering Science 21(4):287–297, DOI: https://doi.org/10.1243/JMES_JOUR_1979_021_046_02
Norman C, Farritor S, Arnold R, Elias SEG, Fateh M (2004) Design of a system to measure track modulus from a moving railcar. In: Proceedings of International Conference of Railway Engineering 2004. Engineering Technics Press, London, UK
Poulos HG, Davis EH (1974) Elastic solutions for soil and rock mechanics. John Wiley & Sons, Hoboken, NJ, USA
Prause RH, Kennedy JC (1977) Parametric study of track response. Report DOT-TSC-FRA-77-75, US Department of Transportation, Washington DC, USA
Rajani B, Zhan C, Kuraoka S (1996) Pipe-soil interaction analysis of jointed water mains. Canadian Geotechnical Journal 33(3):393–404, DOI: https://doi.org/10.1139/t96-061
Read D, Chrismer S, Ebersöhn W, Selig ET (1994) Track modulus measurements at the pueblo soft subgrade site. Transportation Research Record 1470:55–64
Roghani A, Hendry MT (2017) Quantifying the impact of subgrade stiffness on track quality and the development of geometry defects. Journal of Transportation Engineering Part A: Systems 143(7):1–10, DOI: https://doi.org/10.1061/JTEPBS.0000043
Sadeghi J, Barati P (2010) Improvements of conventional methods in railway track analysis and design. Canadian Journal of Civil Engineering 37(5):675–683, DOI: https://doi.org/10.1139/L10-010
Schapery RA (1965) A method of viscoelastic stress analysis using elastic solutions. Journal of the Franklin Institute 279(4):268–289
Selig ET, Li D (1994) Track modulus: Its meaning and factors influencingit. Transportation Research Record 1470:47–54
Selig ET, Waters JM (1994) Track geotechnology and substructure management. Thomas Telford Ltd., London, UK
Setiadji BH, Fwa TF (2009) Examining k-E relationship of pavement subgrade based on load-deflection consideration. Journal of Transportation Engineering 135(3):140–148, DOI: https://doi.org/10.1061/(ASCE)0733-947X(2009)135:3(140)
Steinbrenner WA (1936) A rational method for determination of the vertical normal stresses under foundations. Proceedings of the first international conference on soil mechanics and foundation engineering, June 22–26, Cambridge, MA, USA
Stewart HE (1985) Measurement and prediction of vertical track modulus. Transportation Research Record 1022:65–71
Terzaghi K (1955) Evaluation of coefficients of subgrade reaction. Geotechnique 5(4):41–50
Tzanakakis K (2013) The effect of track stiffness on track performance. In: The railway track and its long term behaviour, STTT 2, Springer-Verlag, Berlin, Germany, 79–87
Vesic AB (1961) Beams on elastic subgrade and the winkler's hypothesis. Proceedings of the 5th international conference on soil mechanics and foundation engineering, July 17–22, Paris, France
Vesic AS, Saxena SK (1969) Analysis of structural behavior of road test rigid pavements. Highway Research Record 291:156–158
Westergaard HM (1948) New formulas for stresses in concrete pavements of airfields. Transactions of the American Society of Civil Engineers, 113:425–439
Winkler E (1867) Die Lehre von der Elastizitätund Festigkeit, mit Besonderer Rücksicht auf ihre Anwendung in der Technik. H. Dominicus, Prague, Czech Republic
Wood AMM (1975) The circular tunnel in elastic ground. Géotechnique 25(1):115–127, DOI: 10.1680/geot.1975.25.1.115
Zakeri JA, Abbasi R (2012) Field investigation on variation of rail support modulus in ballasted railway tracks. Latin American Journal of Solids and Structures 9(6):643–656, DOI: https://doi.org/10.1590/S1679-78252012000600002
Zakeri JA, Sadeghi J (2007) Field Investigation on load distribution and deflections of railway track sleepers. Journal of Mechanical Science and Technology 21:1948–1956, DOI: https://doi.org/10.1007/BF03177452
Acknowledgements
The support from Innovation Fund Denmark is gratefully acknowledged. This study is part of ‘Roads2Rails: Innovative and cost-effective asphalt based railway construction system’ (Grand Solutions 5156-00006B).
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Bose, T., Levenberg, E. A Priori Determination of Track Modulus Based on Elastic Solutions. KSCE J Civ Eng 24, 2939–2948 (2020). https://doi.org/10.1007/s12205-020-5372-5
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DOI: https://doi.org/10.1007/s12205-020-5372-5