Energy Damage Detection Strategy Based on Strain Responses for Long-Span Bridge Structures
Publication: Journal of Bridge Engineering
Volume 16, Issue 5
Abstract
An energy damage detection strategy through disposing strain responses has been developed. First, the strain-based energy dynamic indexes for a system with multiple degrees of freedom were derived from the frequency response function (FRF) of strain responses and energy spectra density. Then, the traditional mode-shape curvature strategy and the proposed strain-based energy damage detection strategy were both used to analyze a long-span cable-stayed bridge, and it was found through comparison that the proposed strain-based energy damage detection strategy solved the shortcomings of the traditional mode-shape curvature strategy. Finally, damage location, damage quantification, and noise pollution resistance analysis for a long-span cable-stayed bridge with different degrees of damage were carried out to verify the effectiveness of the proposed strain-based energy damage detection strategy. The numerical analysis showed that the proposed strain-based energy damage detection strategy can locate damage positions accurately, and it also has good damage quantification and noise pollution resistance abilities.
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Acknowledgments
This research was supported by Key Projects in the National Science and Technology Pillar Program (UNSPECIFIED2006BAJ03B05), the Momentous Research Plan in National Natural Science Foundation of China (NNSFC90915004), the Six Kinds of Peak Talents in Jiangsu Province, and 333 High-Level Talent Project in Jiangsu Province. This support is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 16 • Issue 5 • September 2011
Pages: 644 - 652
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jul 29, 2010
Accepted: Oct 28, 2010
Published online: Aug 15, 2011
Published in print: Sep 1, 2011
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