Experimental and Numerical Study on Rolling Friction in Tower Saddle of Suspension Bridges
Publication: Journal of Bridge Engineering
Volume 28, Issue 9
Abstract
Rolling friction pairs in the tower saddle of suspension bridges could significantly reduce the horizontal load that is transferred to the tower. To investigate the dependence of the rolling friction coefficient (μ) of a rolling friction pair on the normal load (fn) and the cylinder radius (R), an experiment was conducted where a sandwich-like mechanism measured μ. Based on the μ–fn–R relationship, a numerical model, which used one-dimensional (1D) Gaussian random nonplanar surface representation, was proposed in this research to calculate the overall rolling friction coefficient (μT) of a multiroller plate system. The experimental results showed that the dependence of μ on fn and R could be divided into three stages: (1) roughness; (2) elastic; and (3) inelastic. In addition, μ was proportional to in the elastic stage. The proposed numerical model could accurately calculate μT for a multiroller plate system. The μT rose with increasing surface nonplanarity and slightly increased with the number of rollers (N). This clarified that the μ–fn–R relationship and proposed numerical model could help to quickly determine the size of the rollers and the flatness of plates during design and reduce the scale of the experiments required.
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Data Availability Statement
All data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (Grant No. 52178145).
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© 2023 American Society of Civil Engineers.
History
Received: Oct 8, 2022
Accepted: May 2, 2023
Published online: Jun 20, 2023
Published in print: Sep 1, 2023
Discussion open until: Nov 20, 2023
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