Time-varying parameter identification of bridges subject to moving vehicles using ridge extraction based on empirical wavelet transform

Li, J; Guo, J; Zhu, X

Time-varying parameter identification of bridges subject to moving vehicles using ridge extraction based on empirical wavelet transform

Li, J

Guo, J Zhu, X

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Publisher:: World Scientific Pub Co Pte Lt
Publication Type:: Journal Article
Citation:: International Journal of Structural Stability and Dynamics, 2021, pp. 2150046-2150046
Issue Date:: 2021-01-01

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Field	Value	Language
dc.contributor.author	Li, J https://orcid.org/0000-0001-9181-3653
dc.contributor.author	Guo, J
dc.contributor.author	Zhu, X https://orcid.org/0000-0001-5083-9320
dc.date.accessioned	2021-02-25T04:23:54Z
dc.date.available	2021-02-25T04:23:54Z
dc.date.issued	2021-01-01
dc.identifier.citation	International Journal of Structural Stability and Dynamics, 2021, pp. 2150046-2150046
dc.identifier.issn	0219-4554
dc.identifier.issn	1793-6764
dc.identifier.uri	http://hdl.handle.net/10453/146449
dc.description.abstract	© 2021 World Scientific Publishing Company. For a vehicle moving over a bridge, the vehicle-bridge interaction (VBI) embraces the time-varying modal parameters of the system. The identification of non-stationary characteristics of bridge responses due to moving vehicle load is important and remains a challenging task. A new method based on the improved empirical wavelet transform (EWT) along with ridge detection of signals in time-frequency representation (TFR) is proposed to estimate the instantaneous frequencies (IFs) of the bridge. Numerical studies are conducted using a VBI model to investigate the time-varying characteristics of the system. The effects of the measurement noise, road surface roughness and structural damage on the bridge IFs are investigated. Finally, the dynamic responses of an in-situ cable-stayed bridge subjected to a passing vehicle are analyzed to further explore the time varying characteristics of the VBI system. Numerical and experimental studies demonstrate the feasibility and effectiveness of the proposed method on the IF estimation. The identified IFs reveal important time-varying characteristics of the bridge dynamics that is significant to evaluating the actual performance of operational bridges in operation and may be used for structural health assessment.
dc.language	en
dc.publisher	World Scientific Pub Co Pte Lt
dc.relation	http://purl.org/au-research/grants/arc/DP160103197
dc.relation.ispartof	International Journal of Structural Stability and Dynamics
dc.relation.isbasedon	10.1142/S0219455421500462
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0905 Civil Engineering, 0913 Mechanical Engineering
dc.title	Time-varying parameter identification of bridges subject to moving vehicles using ridge extraction based on empirical wavelet transform
dc.type	Journal Article
utslib.for	0905 Civil Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	open_access	*
dc.date.updated	2021-02-25T04:23:52Z
pubs.publication-status	Published

Abstract:

© 2021 World Scientific Publishing Company. For a vehicle moving over a bridge, the vehicle-bridge interaction (VBI) embraces the time-varying modal parameters of the system. The identification of non-stationary characteristics of bridge responses due to moving vehicle load is important and remains a challenging task. A new method based on the improved empirical wavelet transform (EWT) along with ridge detection of signals in time-frequency representation (TFR) is proposed to estimate the instantaneous frequencies (IFs) of the bridge. Numerical studies are conducted using a VBI model to investigate the time-varying characteristics of the system. The effects of the measurement noise, road surface roughness and structural damage on the bridge IFs are investigated. Finally, the dynamic responses of an in-situ cable-stayed bridge subjected to a passing vehicle are analyzed to further explore the time varying characteristics of the VBI system. Numerical and experimental studies demonstrate the feasibility and effectiveness of the proposed method on the IF estimation. The identified IFs reveal important time-varying characteristics of the bridge dynamics that is significant to evaluating the actual performance of operational bridges in operation and may be used for structural health assessment.

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http://hdl.handle.net/10453/146449