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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.
1742-6588
1-12
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
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. Journal of Physics: Conference Series, 744 (1), 1-12, [012053]. (doi:10.1088/1742-6596/744/1/012053).

Record type: Article

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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Masri 2016 J. Phys. Conf. Ser. 744 012053 - Version of Record
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More information

Accepted/In Press date: 12 August 2016
e-pub ahead of print date: 1 September 2016
Published date: 2016
Venue - Dates: 13th International Conference on Motion and Vibration Control (MOVIC 2016) and the 12th International Conference on Recent Advances in Structural Dynamics (RASD 2016), United Kingdom, 2016-07-04 - 2016-07-06
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 399543
URI: http://eprints.soton.ac.uk/id/eprint/399543
ISSN: 1742-6588
PURE UUID: fb754941-a551-4a5e-9b66-5b8d71285b0e
ORCID for Neil Ferguson: ORCID iD orcid.org/0000-0001-5955-7477

Catalogue record

Date deposited: 19 Aug 2016 12:06
Last modified: 07 Oct 2020 06:04

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