Analysis of a typical railway turnout sleeper system using grillage beam analogy
Article
Article Title | Analysis of a typical railway turnout sleeper system using grillage beam analogy |
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ERA Journal ID | 3671 |
Article Category | Article |
Authors | Manalo, Allan (Author), Aravinthan, Thiru (Author), Karunasena, Warna (Author) and Stevens, Nick (Author) |
Journal Title | Finite Elements in Analysis and Design |
Journal Citation | 48 (1), pp. 1376-1391 |
Number of Pages | 16 |
Year | 2012 |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0168-874X |
1872-6925 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.finel.2011.08.007 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0168874X1100148X |
Abstract | A simplified grillage beam analogy was performed to investigate the behaviour of railway turnout sleeper system with a low value of elastic modulus on different support moduli. This study aimed at determining an optimum modulus of elasticity for an emerging technology for railway turnout application - fibre composites sleeper. The finite element simulation suggests that the changes in modulus of elasticity of sleeper, Esleeper and the sleeper support modulus, Us have a significant influence on the behaviour of turnout sleepers. The increase in Us from 10 to 40 MPa resulted in a 15% reduction in the bending moment while the increase in Esleeper from 1 GPa to 10 GPa has resulted in almost 75% increase in the bending moment. The shear forces in turnout sleepers is not sensitive to both the changes of the Esleeper and Us while the sleeper with low Esleeper tend to undergo greater settlement into the ballast. An Esleeper of 4 GPa was found optimal for an alternative fibre composite turnout sleeper provided that the Us is at least 20 MPa from the consideration of sleeper ballast pressure and maximum vertical deflection. It was established that the turnout sleeper has a maximum bending moment of 19 kN-m and a shear force of 158 kN under service conditions. |
Keywords | grillage beam analogy; turnout sleepers; modulus of elasticity; support modulus; fibre composites |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
400512. Transport engineering | |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Nick Stevens Consulting, Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q11y9/analysis-of-a-typical-railway-turnout-sleeper-system-using-grillage-beam-analogy
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