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Application of the wave finite element method to reinforced concrete structures with damage

Application of the wave finite element method to reinforced concrete structures with damage
Application of the wave finite element method to reinforced concrete structures with damage
Vibration based methods are commonly deployed to detect structural damage using sensors placed remotely from potential damage sites. Whilst many such techniques are modal based there are advantages to adopting a wave approach, in which case it is essential to characterise wave propagation in the structure. The Wave Finite Element method (WFE) is an efficient approach to predicting the response of a composite waveguide using a conventional FE model of a just a short segment. The method has previously been applied to different structures such as laminated plates, thinwalled structures and fluid-filled pipes. In this paper, the WFE method is applied to a steel reinforced concrete beam. Dispersion curves and wave mode shapes are first presented from free wave solutions, and these are found to be insensitive to loss of thickness in a single reinforcing bar. A reinforced beam with localised damage is then considered by coupling an FE model of a short damaged segment into the WFE model of the undamaged beam. The fundamental bending, torsion and axial waves are unaffected by the damage but some higher order waves of the cross section are significantly reflected close to their cut-on frequencies. The potential of this approach for detecting corrosion and delamination in reinforced concrete beams will be investigated in future work.
El Masri, Evelyne
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Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Waters, Timothy
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El Masri, Evelyne
0d6aa7b3-ce5e-4798-a760-7692a3aca0e6
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Waters, Timothy
348d22f5-dba1-4384-87ac-04fe5d603c2f

El Masri, Evelyne, Ferguson, Neil and Waters, Timothy (2016) Application of the wave finite element method to reinforced concrete structures with damage. Thirteenth International Conference on Motion and Vibration Control (MOVIC 2016) joint with the Twelfth International Conference on Recent Advances in Structural Dynamics (RASD), United Kingdom. 03 - 06 Jul 2016. 11 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Vibration based methods are commonly deployed to detect structural damage using sensors placed remotely from potential damage sites. Whilst many such techniques are modal based there are advantages to adopting a wave approach, in which case it is essential to characterise wave propagation in the structure. The Wave Finite Element method (WFE) is an efficient approach to predicting the response of a composite waveguide using a conventional FE model of a just a short segment. The method has previously been applied to different structures such as laminated plates, thinwalled structures and fluid-filled pipes. In this paper, the WFE method is applied to a steel reinforced concrete beam. Dispersion curves and wave mode shapes are first presented from free wave solutions, and these are found to be insensitive to loss of thickness in a single reinforcing bar. A reinforced beam with localised damage is then considered by coupling an FE model of a short damaged segment into the WFE model of the undamaged beam. The fundamental bending, torsion and axial waves are unaffected by the damage but some higher order waves of the cross section are significantly reflected close to their cut-on frequencies. The potential of this approach for detecting corrosion and delamination in reinforced concrete beams will be investigated in future work.

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More information

e-pub ahead of print date: 3 July 2016
Additional Information: Thirteenth International Conference on Motion and Vibration Control (MOVIC 2016) joint with the Twelfth International Conference on Recent Advances in Structural Dynamics (RASD)
Venue - Dates: Thirteenth International Conference on Motion and Vibration Control (MOVIC 2016) joint with the Twelfth International Conference on Recent Advances in Structural Dynamics (RASD), United Kingdom, 2016-07-03 - 2016-07-06
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 399607
URI: http://eprints.soton.ac.uk/id/eprint/399607
PURE UUID: f963691b-509b-41ea-ab8a-b7cc422eb4ed
ORCID for Neil Ferguson: ORCID iD orcid.org/0000-0001-5955-7477

Catalogue record

Date deposited: 19 Aug 2016 11:00
Last modified: 30 Jul 2020 01:30

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