Track–Bridge Interaction Analysis Using Interface Elements Adaptive to Various Loading Cases
Publication: Journal of Bridge Engineering
Volume 21, Issue 9
Abstract
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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Acknowledgments
This study was supported by a grant from the R&D Program of the Korea Railroad Research Institute, Republic of Korea.
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Published In
Journal of Bridge Engineering
Volume 21 • Issue 9 • September 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Aug 21, 2015
Accepted: Feb 4, 2016
Published online: Mar 30, 2016
Discussion open until: Aug 30, 2016
Published in print: Sep 1, 2016
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