Fast Warning Method for Rigid Hangers in a High-Speed Railway Arch Bridge Using Long-Term Monitoring Data
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 6
Abstract
Excessive vibration of arch bridge hangers is a potential threat to the driving safety of high-speed trains; therefore, it is important to study the vibration characteristics and fast warning method of the hanger under environmental factors such as high-speed train load and ambient excitation. The Nanjing Dashengguan Yangtze River Bridge, the longest high-speed railway arch bridge in the world, with a design speed of , was selected as the research subject in this paper to investigate the fast warning method for rigid hangers in a high-speed railway arch bridge. This work analyzes the influence of environmental factors on the hanger’s transverse vibration characteristics using long-term monitoring data: several transverse vibration characteristics of the hanger, which are induced by train or ambient wind, were obtained through vibration data collected from the structural health monitoring system; eight train load cases were classified; and the methods of excluding train speed, temperature, and ambient wind are introduced. This paper proposes a method for establishing a reference service condition database including different subdatabases for a hanger. Finally, three reference service condition subdatabases are provided as examples to introduce the fast warning method. The conclusions show that environmental factors influence a hanger’s transverse vibration characteristics, and environmental factors must be considered in the condition evaluation of the hangers. All of these provide a systematic method for establishing a hanger’s reference service condition database, which can be used for fast warning of hanger anomalies in a high-speed railway arch bridge.
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Acknowledgments
The authors would like to express their gratitude for financial support from the National Natural Science Foundation of China (51508070), the National Key Basic Research Program of China (2015CB060000), the Fundamental Research Funds for the Central Universities (DUT16YQ101), and the Opening Fund of State Key Laboratory of Structural Analysis for Industrial Equipment (GZ1601).
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 6 • December 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Dec 23, 2016
Accepted: May 19, 2017
Published online: Sep 13, 2017
Published in print: Dec 1, 2017
Discussion open until: Feb 13, 2018
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