Frictional Resistance between Main Cable and Saddle for Suspension Bridges. I: Friction Characteristic of Single Strand
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VIEW THE ORIGINAL ARTICLEPublication: Journal of Bridge Engineering
Volume 25, Issue 8
Abstract
The frictional resistance between main cable and saddle of a long-span, multispan suspension bridge is significant for the safety of the bridge. Typically, the main cable of a long-span, multispan suspension bridge has hundreds of strands. It is essential to understand the frictional resistance between the main cable and saddle for the design and evaluation of the bridge. In order to understand the fundamental mechanism of formation of frictional resistance, this paper studies the frictional resistance between single strand and saddle through finite element analysis. A simple yet effective and efficient model is delivered as a tool for analyzing the frictional resistance between single strand and saddle. The model is validated against model test results, and then used to investigate the distribution of strand force, nominal coefficient of friction, and the friction components at the saddle's side and bottom surfaces. The strand tension distributions are nonuniform along the strand and in the radial direction of the saddle. The friction components at the saddle's side and bottom surfaces follow opposite trends as the relative slip between the strand and saddle increases.
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Acknowledgments
This study was funded by the National Natural Science Foundation of China (Grant Numbers 51778533, 51878561, 51978579, and 51578455), the Fundamental Research Funds for the Central Universities (Grant Number 2682014CX078), the National Science and Technology Support Program of China (Grant Number 2011BAG07B03) and the Open Project Funds of State Key Laboratory for Health and Safety of Bridge Structures (Grant Number BHSKL18-01-KF).
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Published In
Journal of Bridge Engineering
Volume 25 • Issue 8 • August 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Jan 17, 2019
Accepted: Mar 18, 2020
Published online: May 21, 2020
Published in print: Aug 1, 2020
Discussion open until: Oct 21, 2020
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