Track–Bridge Interaction Analysis Using Interface Elements Adaptive to Various Loading Cases

In this paper, a numerical model using interface elements is proposed for the sequential analysis of nonlinear track–bridge interaction by taking the loading history into consideration. Longitudinal resistance tests were conducted on track fastening systems to determine changes in track resistance that occur at the instant of application or release of a vertical load. On the basis of the test results, longitudinal track stiffness laws for a nonballasted track were established for different loading cases including constant vertical load, sudden application of vertical load, and sudden release of vertical load. In addition, an interface element adaptive to various loading cases that can be incorporated into a conventional FEM was formulated for modeling the track resistance. Furthermore, a numerical algorithm for a practical solution of the nonlinear system equation was developed. The validity and applicability of the proposed analysis method were verified by conducting extensive parameter studies on a simply supported bridge and a multispan bridge.

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  • English

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Filing Info

  • Accession Number: 01599559
  • Record Type: Publication
  • Files: TRIS, ASCE
  • Created Date: Mar 30 2016 3:04PM