Damping Properties of Highway Bridges in China
Publication: Journal of Bridge Engineering
Volume 19, Issue 5
Abstract
Full-scale data on the natural frequencies and the damping ratios of 114 highway bridges in China, and the dynamic characteristics monitoring data of four bridges under ambient excitation, have been collected and analyzed. The data indicate that the natural frequencies of the long-span bridges have power function relationships with the lengths of the main spans, whereas the damping ratios of the bridges scatter with the influence of the width of section, the piers, the material, the test environment, and the bridge type. Values of the damping ratios of different bridge types in China are proposed based on the collected data. With the increase in service ages, the natural frequencies of the bridges change little, whereas the damping ratios of the bridges decrease and tend toward stable after certain years. The forms of damage, the locations of damage, and the strengthening methods have a great influence on the changing of damping ratios.
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Acknowledgments
The authors gratefully acknowledge the financial support of National Science Foundation of China (grant No. 51278038) and the data support of Research Institute of Highway Ministry of Transport in China and China Academy of Railway Sciences.
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Information
Published In
Journal of Bridge Engineering
Volume 19 • Issue 5 • May 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 20, 2013
Accepted: Nov 4, 2013
Published online: Jan 7, 2014
Published in print: May 1, 2014
Discussion open until: Jun 7, 2014
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