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Numerical modeling of railway track supporting system using finite–infinite and thin layer elements

  • Noorzaei, J.
  • Thanoon, W.A.M.
  • Yeat, W.F.
  • Moradipour, P.
  • Jaafar, M.S.
Publication Date
Jun 01, 2009
Queensland University of Technology ePrints Archive
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The present contribution deals with the numerical modelling of railway track-supporting systems-using coupled finite-infinite elements-to represent the near and distant field stress distribution, and also employing a thin layer interface element to account for the interfacial behaviour between sleepers and ballast. To simulate the relative debonding, slipping and crushing at the contact area between sleepers and ballast, a modified Mohr-Coulomb criterion was adopted. Further more an attempt was made to consider the elasto plastic materials’ non-linearity of the railway track supporting media by employing different constitutive models to represent steel, concrete and other supporting materials. It is seen that during an incremental-iterative mode of load application, the yielding initially started from the edge of the sleepers and then flowed vertically downwards and spread towards the centre of the railway supporting system.

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