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Wave propagation in reinforced and prestressed concrete structures with damage

Wave propagation in reinforced and prestressed concrete structures with damage
Wave propagation in reinforced and prestressed concrete structures with damage
Corrosion of the steel reinforcement bars in reinforced concrete is the most common cause of premature failure that must be pre-empted. In this respect, wave based techniques provide a potential detection approach. In this paper, wave propagation is modelled in a steel reinforced concrete beam with and without prestress. A short section of the beam is modelled in ANSYS. This model is then used in the wave finite element (WFE) framework, which assumes spatial periodicity along the waveguide, to model a beam of infinite extent. Corrosion of the reinforcement bars is represented by a local loss of thickness. Numerical case studies are presented to investigate the effects of various configurations and the severity of damage on the dispersion curves of the propagating waves. Scattering matrices are also calculated for the damage site, by coupling damaged and undamaged sections of the waveguide. Wave modes are subsequently identified for which the reflection coefficients are potentially sufficiently large to observe and use for damage identification.
El Masri, Evelyne
43727a4d-57a0-4ebb-be41-54114061818b
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Waters, Timothy
348d22f5-dba1-4384-87ac-04fe5d603c2f
El Masri, Evelyne
43727a4d-57a0-4ebb-be41-54114061818b
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Waters, Timothy
348d22f5-dba1-4384-87ac-04fe5d603c2f

El Masri, Evelyne, Ferguson, Neil and Waters, Timothy (2016) Wave propagation in reinforced and prestressed concrete structures with damage. ISMA 2016 Conference on Noise and Vibration Engineering, Belgium. 19 - 21 Sep 2016. 12 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Corrosion of the steel reinforcement bars in reinforced concrete is the most common cause of premature failure that must be pre-empted. In this respect, wave based techniques provide a potential detection approach. In this paper, wave propagation is modelled in a steel reinforced concrete beam with and without prestress. A short section of the beam is modelled in ANSYS. This model is then used in the wave finite element (WFE) framework, which assumes spatial periodicity along the waveguide, to model a beam of infinite extent. Corrosion of the reinforcement bars is represented by a local loss of thickness. Numerical case studies are presented to investigate the effects of various configurations and the severity of damage on the dispersion curves of the propagating waves. Scattering matrices are also calculated for the damage site, by coupling damaged and undamaged sections of the waveguide. Wave modes are subsequently identified for which the reflection coefficients are potentially sufficiently large to observe and use for damage identification.

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Evelyne El Masri 146-ISMA2016.pdf - Accepted Manuscript
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More information

e-pub ahead of print date: 19 September 2016
Venue - Dates: ISMA 2016 Conference on Noise and Vibration Engineering, Belgium, 2016-09-19 - 2016-09-21
Organisations: Inst. Sound & Vibration Research

Identifiers

Local EPrints ID: 400839
URI: http://eprints.soton.ac.uk/id/eprint/400839
PURE UUID: 5fb2d1f4-b017-4a3d-b2d2-903e2c7565ed
ORCID for Neil Ferguson: ORCID iD orcid.org/0000-0001-5955-7477

Catalogue record

Date deposited: 27 Sep 2016 16:15
Last modified: 09 Jun 2020 00:23

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