Damage assessment of concrete gravity dams using vibration characteristics

Le, N. T. and Thambiratnam, D. P. and Chan, T. H. T. and Nguyen, A. and Huynh, B. K .T. (2016) Damage assessment of concrete gravity dams using vibration characteristics. In: 6th International Conference on Structural Engineering, Mechanics and Computation: Insights and Innovations in Structural Engineering, Mechanics and Computation (SEMC 2016), 5-7 Sept 2016, Cape Town, South Africa.

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Abstract

Vibration-based Structural Health Monitoring (VBSHM) has emerged as a feasible technique in long-term monitoring, structural performance evaluation and damage assessment of civil structures. As an important as-pect of the complete VBSHM system, over the last three decades, many vibration-based damage detection methods have been developed for buildings and bridges. However, the application of these techniques to con-crete gravity (CG) dams has been limited. In the present study, damage indices based on changes in modal flexibility and modal strain energy are suitably enhanced to be applicable for plane-strain structures. They are then used to investigate the feasibility of detecting and locating damage in a finite element CG dam model without noise effects. Results show that the enhanced damage indices can be promising for locating damage in the upstream part of CG dams by using only the first lateral mode of vibration. In addition, it is necessary to monitor both horizontal and vertical mode shape components and use these for structural damage diagnoses in CG dams.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 05 Jul 2019 04:59
Last Modified: 12 Jul 2019 02:04
Uncontrolled Keywords: modal flexibility, modal strain energy, damage detection, damage indices, vibration damage detection, concrete gravity dams
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
URI: http://eprints.usq.edu.au/id/eprint/36682

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