A new method for locating and quantifying damage in beams from static deflection changes

Le, N. T. and Thambiratnam, D. P. and Nguyen, A. and Chan, T. H. T (2019) A new method for locating and quantifying damage in beams from static deflection changes. Engineering Structures, 180 (2019). pp. 779-792. ISSN 0141-0296


static deflection. Using the principle of Virtual Work, for the first time, the deflection change (DC) parameter is formulated as a function of both the damage location and damage severity. Through this, the study shows that
the changes in static deflection follow certain patterns that clearly reveal the damage location. Therefore, by observing a plot of the measured DC, the damage locations can be identified conveniently. Once the damage is located, its severity is estimated directly from the measured relative deflection change through a new concept
named damage severity consistency (DSC) function. A constant or nearly constant DSC function indicates a high
precision of the damage detection results and reflects a good quality of the measurement data. Numerical and laboratory investigations demonstrate that the method accurately locates and quantifies the damage under various scenarios in statically determinate beams. The proposed damage detection method has a clear theoretical base, does not rely on an optimization algorithm, and can be extended to other beam-type structures including statically indeterminate beams.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version embargoed until 1 March 2020 (12 months), in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials
Date Deposited: 20 Dec 2018 04:57
Last Modified: 01 Jul 2019 02:56
Uncontrolled Keywords: structural health monitoring, static damage detection, static deflection, static relative deflection, damage locating, damage quantification, structural damage
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Identification Number or DOI: 10.1016/j.engstruct.2018.11.071
URI: http://eprints.usq.edu.au/id/eprint/35292

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