Train-Track-Bridge Interaction by Coupling Direct Stiffness Method and Mode Superposition Method
Publication: Journal of Bridge Engineering
Volume 21, Issue 10
Abstract
In this study, a track-bridge model was proposed by combining the direct stiffness method (DSM) and the mode superposition method (MSM) for analysis of the train-track-bridge interaction. The tracks were modeled by applying DSM, which can effectively display the nonlinear contact spring and the dynamic behavior of the tracks. The bridge was modeled by applying MSM, a method that can efficiently show dynamic behavior with a small number of modes. The analysis model was built based on a previously proposed train-track analysis model. Consequently, the train, track, and bridge were modeled as a coupled system that was interconnected by nonlinear Hertzian springs between the train and track, and springs and dampers between the track and bridge. Thus, the convergence is greatly improved as a result of the stabilization of the analytical system. Using the proposed train-bridge-track interaction analysis model, the impacts of the vertical displacements of the bridge resulting from thermal load on the dynamic behavior of the bridge, the train safety, and the passenger comfort were investigated for a steel arch bridge that will be constructed along the Honam high-speed line in Korea.
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Acknowledgments
This research 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 10 • October 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Feb 11, 2015
Accepted: Sep 3, 2015
Published online: Apr 8, 2016
Discussion open until: Sep 8, 2016
Published in print: Oct 1, 2016
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