Damage quantification in beam-like structures from modal flexibility change
Paper
Paper/Presentation Title | Damage quantification in beam-like structures from modal flexibility change |
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Presentation Type | Paper |
Authors | Le, N. T. (Author), Thambiratnam, D. P. (Author), Chan, T. H. T (Author) and Nguyen, A. (Author) |
Editors | Chan, Tommy and Mahini, Saeed |
Journal or Proceedings Title | Proceedings of the 8th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII 2017) |
ERA Conference ID | 43541 |
Journal Citation | 3, pp. 1613-1622 |
Number of Pages | 10 |
Year | 2018 |
Place of Publication | Red Hook, NY, USA |
ISBN | 9781510864573 |
Web Address (URL) of Paper | http://www.proceedings.com/39899.html |
Conference/Event | 8th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII 2017): Structural Health Monitoring in Real-World Application |
International Conference on Structural Health Monitoring of Intelligent Infrastructure | |
Event Details | International Conference on Structural Health Monitoring of Intelligent Infrastructure Rank A A A A A A A A |
Event Details | 8th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII 2017): Structural Health Monitoring in Real-World Application Event Date 05 to end of 08 Dec 2017 Event Location Brisbane, Australia |
Abstract | An approach to quantify the severity of damage in Euler-Bernoulli beams from changes in modal flexibility is presented. The approach is built on two pillars. The first is the connection between flexibility relative change (RFC) and the damage-induced relative deflection (DI-RD). This connection allows one to estimate the DI-RD under arbitrary static point loads from the dynamically measured RFC matrix. The second pillar is the theoretical relationship between (i) the elemental damage severity and (ii) the DI-RD under unit point loads. For statically determinate beams, the scalar function relating these two parameters can be conveniently formulated from the principle of Virtual Work method. It reveals that the scalar function contains only the geometrical information including location of the identified damaged element. Therefore, once the damaged element is located, the damage severity can be calculated. Numerical investigations show that the approach accurately quantifies damage in cantilever and simply supported beams. A merit of this approach is that it has a clear theoretical base and it can be expanded to any statically determinate and indeterminate beam-type structures whose deformation function under point loads can be formulated. As beams can represent various structural components, the proposed approach provides a promising platform targeting the application to real structures |
Keywords | structures (built objects); damage detection; structural health monitoring; modal strain |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Queensland University of Technology |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q54w8/damage-quantification-in-beam-like-structures-from-modal-flexibility-change
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