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    Three-dimensional numerical modelling of ballasted railway track foundations for high-speed trains with special reference to critical speed

    238172_238172.pdf (1.026Mb)
    Access Status
    Open access
    Authors
    Shahin, Mohamed
    Sayeed, M.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Shahin, M. and Sayeed, M. 2016. Three-dimensional numerical modelling of ballasted railway track foundations for high-speed trains with special reference to critical speed. Transportation Geotechnics. 6: pp. 55-65.
    Source Title
    Transportation Geotechnics
    DOI
    10.1016/j.trgeo.2016.01.003
    ISSN
    2214-3912
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/18727
    Collection
    • Curtin Research Publications
    Abstract

    Due to recent congestion of highways in many countries around the world, railways have become the most popular means of public transportation, which has increased the demand for heavier and faster trains. High speeds and heavy loads of trains are usually accompanied with large vibrations in the train-track-ground system, especially when train speed reaches its critical value, leading to possible train derailment and track damages. This unwanted scenario makes it important for railway geotechnical engineers to investigate the behaviour of ballasted railway track foundations for high-speed trains, with special reference to critical speed. In the current paper, a sophisticated three-dimensional (3D) finite element (FE) modelling was developed to simulate the dynamic response of ballasted railway tracks subjected to train moving loads, and the critical speed was investigated for various train-track-ground system conditions. The results were presented in terms of the evolution of the coefficient of dynamic amplification of sleeper deflection versus train speed, which have been synthesized into simple sensitivity charts that can be used to determine the critical speed corresponding to the conditions of a particular train-track-ground system.

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