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    Effect of High Speed Rail Transit and Impact Loads on Ballast Degradation

    Access Status
    Fulltext not available
    Authors
    Keeng, N.
    Li, Jun
    Hao, H.
    Date
    2015
    Type
    Book Chapter
    
    Metadata
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    Abstract

    The emerging need of railway as a principal means of massive transport has encouraged the development of high speed trains in Australia. Large and frequent cyclic loading from heavy and fast trains leads to a progressive deterioration of the underlying railway structural system. The lack of research on degradation of ballast to counter the effects of high speed trains threatens the reliability and safety of train services and hence leads to more frequent and costly maintenance. Compaction testing with the Amsler equipment was conducted to deliver a graphical representation of fouling rates and the loading at which ballast becomes ineffective. The hammer drop test was employed to predict the service life of ballast under cyclic loading. Finite element analysis of a railway structural system subjected to a moving wheel with varying train speeds was conducted to obtain impact forces on sleeper and ballast under wheel flat effect. The deformation and stress behaviour of rail and ballast were investigated. It has been found that trains exceeding 210 km/h with a 100 mm wheel flat defect pose an immediate threat of accelerated fouling of ballast. Key findings also include the detection of different stages of ballast interaction, the observation of critical fouling force and the service life prediction of ballast under different train speeds.

    Citation
    Keeng, N. and Li, J. and Hao, H. 2015. Effect of High Speed Rail Transit and Impact Loads on Ballast Degradation, in Engineering Asset Management - Systems, Professional Practices and Certification, pp. 521-531: Springer.
    Source Title
    ENGINEERING ASSET MANAGEMENT - SYSTEMS, PROFESSIONAL PRACTICES AND CERTIFICATION
    DOI
    10.1007/978-3-319-09507-3_45
    ISBN
    978-3-319-09506-6
    School
    Curtin Graduate School of Business
    Remarks

    Paper presented at: 8th World Congress on Engineering Asset Management (WCEAM 2013) & the 3rd International Conference on Utility Management & Safety (ICUMAS)

    URI
    http://hdl.handle.net/20.500.11937/9144
    Collection
    • Curtin Research Publications

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