MODELLING RAIL TRACK PERFORMANCE: AN INTEGRATED APPROACH

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MODELLING RAIL TRACK PERFORMANCE: AN INTEGRATED APPROACH

Mensagem por Manuela » 05 Set 2016, 14:46

Autores: Yu-Jiang Zhang, Martin Murray, Luis Ferreira.

Zhang, Y. J., Murray, M. H. and Ferreira. L. (2000). Modelling Rail Track Performance: An
Integrated Approach. , Transport Journal, 187-194.

Abstract:
This paper reports on the work undertaken at the Queensland University of Technology to develop an
integrated computer based tool for the prediction of track behaviour under changing traffic conditions. The track
degradation model described here takes into account the degradation effects due to the interactions between track
components. The model uses mechanistic relationships and embraces all the major factors which may influence
service life of track components. The model was applied to a typical Australian railway track and the results are
summarised here. The results showed that increasing axle load and train speed accelerates track degradation in
general and rail wear in particular. Sub-grade stiffness and ballast depth are found to be the most important
parameters for track roughness. Timber sleeper failure is sensitive to both traffic parameters and environmental
factors, such as the decay index and track drainage condition. Increases in axle loads may not lead to higher sleeper
damage failure rate at fixed traffic loads. Decay index, track drainage condition and average age of sleepers, all have
a noticeable effect on sleeper failure.
Key Words: modelling, track performance, computer model, track degradation, railway engineering
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