Structural Health Monitoring and Damage Assessment Using Frequency Response Correlation Criteria
Publication: Journal of Engineering Mechanics
Volume 133, Issue 9
Abstract
Two frequency response correlation criteria, namely the global shape correlation (GSC) function and the global amplitude correlation (GAC) function, are established tools to quantify the correlation between predictions from a finite-element (FE) model and measured data for the purposes of FE model validation and updating. This paper extends the application of these two correlation criteria to structural health monitoring and damage detection. In addition, window-averaged versions of the GSC and GAC, namely WAIGSC and WAIGAC, are defined as effective damage indicators to quantify the change in structural response. An integrated method of structural health monitoring and damage assessment, based on the correlation functions and radial basis function neural networks, is proposed and the technique is applied to a bookshelf structure with 24 measured responses. The undamaged and damaged states, single and multiple damage locations, as well as damage levels, were successfully identified in all cases studied. The ability of the proposed method to cope with incomplete measurements is also discussed.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 133 • Issue 9 • September 2007
Pages: 981 - 993
Copyright
© 2007 ASCE.
History
Received: Mar 11, 2005
Accepted: Feb 15, 2007
Published online: Sep 1, 2007
Published in print: Sep 2007
Notes
Note. Associate Editor: Joel P. Conte
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