Wear Evaluation on Slide Bearings in Expansion Joints Based on Cumulative Displacement for Long-Span Suspension Bridge under Monitored Traffic Flow
Publication: Journal of Performance of Constructed Facilities
Volume 34, Issue 1
Abstract
Expansion joints of bridge superstructures generally suffer deterioration more severely than their main structures, and their actual service life is generally shorter than their design service life. This paper aims at evaluating the wear condition of slide bearings in expansion joints for long-span suspension bridges under monitored traffic flow in the operation stage. The spring element was introduced to model the expansion joint and verified by field load tests. The vehicle−bridge dynamic analysis on a steel truss girder bridge was realized in a nonlinear analysis system, in which the monitored traffic flow was simulated to investigate the back-and-forth displacements of expansion joints. Finally, the wear condition of slide bearings was evaluated by comparing cumulative displacements with the critical value specified by the wear criterion. Findings from this research led to the development of an approximate formula to estimate the cumulative displacement at the expansion joint for long-span suspension bridges, suitable for hand calculations.
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Acknowledgments
This work is supported by the National Science Foundation of China (Project No. 51878058) and Foundation Research Funds for the Central University (Project Nos. 300102218209, 300102218403, 300102218702, 300102218403, and 300102219220).
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Published In
Journal of Performance of Constructed Facilities
Volume 34 • Issue 1 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 29, 2018
Accepted: Jun 27, 2019
Published online: Dec 5, 2019
Published in print: Feb 1, 2020
Discussion open until: May 5, 2020
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