Study of the influence of geometrical and mechanical parameters on ballasted railway tracks design

This paper investigates the vertical deflection on ballasted railway tracks from a set of cases of railway track typologies which differ in six track parameters: embankment height, ballast thickness, sleeper spacing, rail pad stiffness, Young’s modulus of the embankment material and the load applied...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2012, 26(9), , pp.2837-2844
Main Authors: Real, Julia I., Gómez, Laura, Montalbán, Laura, Real, Teresa
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Control
Deflection
Design engineering
Dynamical Systems
Embankments
Engineering
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Ground, air and sea transportation, marine construction
Industrial and Production Engineering
Mathematical models
Mechanical Engineering
Mechanical engineering. Machine design
Physics
Railroad tracks
Railway tracks
Railway tracks (foundations and track subgrades)
Railway transportation and traffic
Solid mechanics
Static elasticity (thermoelasticity...)
Stiffness
Structural and continuum mechanics
Transportation infrastructure
Vibration
기계공학
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Summary:This paper investigates the vertical deflection on ballasted railway tracks from a set of cases of railway track typologies which differ in six track parameters: embankment height, ballast thickness, sleeper spacing, rail pad stiffness, Young’s modulus of the embankment material and the load applied to the structure. Finite element method has been the tool to assess the structural combinations and the results provided by linear and nonlinear analyses have been contrasted. Then, a new formulation for the deflection estimation in terms of the aforementioned parameters is presented based on a multiple regression model. The results provided by this formulation have been compared to those obtained from the classic Zimmermann theory. Finally, a stress analysis has been performed to complete the study and better understand the global behaviour of the railway structure. This article pretends to improve the design process and construction of ballasted railway tracks by means of proposing a formulation which estimates the track deflection to obtain the optimum track stiffness.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-012-0734-7