Response Surface Models to Detect and Localize Distributed Cracks in a Complex Continuum
Publication: Journal of Engineering Mechanics
Volume 136, Issue 9
Abstract
Linear response surface (RS) models are used to represent the relationship between samples of response time histories measured by sensors placed across a structure. Different structural states of a general time-variant system are considered for short intervals capturing a linearized model of each state. Within this framework, the error associated with each RS model is sensitive to a modification of the structural state. A method that relates the changes of the statistical characterization of the error to the occurrence of a structural modification is developed for damage detection. The localization of damage is then pursued by identifying the largest discrepancies resulting from the comparison between the statistics of the sum of the squares of the error obtained at each sensor location. The generality of the method is shown by applying it to the experimental data of a realistic structure, which is representative of a continuous body affected by distributed cracking.
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Acknowledgments
This research was supported by grants from the Athenaeum Research Fund of the University of Catania (PRA 2007) and from the Italian Ministry of University Research Fund (PRIN) of the University of Pavia, where the writer previously served as a postdoctoral researcher.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 136 • Issue 9 • September 2010
Pages: 1131 - 1142
Copyright
© 2010 ASCE.
History
Received: Nov 8, 2009
Accepted: Feb 12, 2010
Published online: Feb 15, 2010
Published in print: Sep 2010
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