Analysis of a typical railway turnout sleeper system using grillage beam analogy

Manalo, Allan and Aravinthan, Thiru and Karunasena, Warna and Stevens, Nick (2012) Analysis of a typical railway turnout sleeper system using grillage beam analogy. Finite Elements in Analysis and Design, 48 (1). 1376-1391 . ISSN 0168-874X

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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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Available online 9 Sep 2011 Accepted Version deposited in accordance with the copyright policy of the publisher
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 26 Feb 2012 03:18
Last Modified: 05 Dec 2014 01:52
Uncontrolled Keywords: grillage beam analogy; turnout sleepers; modulus of elasticity; support modulus; fibre composites
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090507 Transport Engineering
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
B Economic Development > 88 Transport > 8801 Ground Transport > 880102 Rail Infrastructure and Networks
Identification Number or DOI: 10.1016/j.finel.2011.08.007

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