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    Fiber Optic Sensing for Monitoring Corrosion-Induced Damage

    171140_171140.pdf (815.5Kb)
    Access Status
    Open access
    Authors
    Maalej, M.
    Ahmed, Shaikh
    Kuang, K.
    Paramasivam, P.
    Date
    2004
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Maalej, M. and Ahmed, S. F. U. and Kuang, K. S. C. and Paramasivam, P. 2004. Fiber Optic Sensing for Monitoring Corrosion-Induced Damage. Structural Health Monitoring. 3 (2): pp. 165-176.
    Source Title
    Structural Health Monitoring
    DOI
    10.1177/1475921704042679
    ISSN
    1475-9217
    School
    Department of Civil Engineering
    Remarks

    The final, definitive version of this paper has been published in Structural Health Monitoring, vol. 3 no. 2, June 2004. by SAGE Publications Ltd, All rights reserved. © Maalej, M. and Ahmed, S. F. U. and Kuang, K. S. C. and Paramasivam, P.

    URI
    http://hdl.handle.net/20.500.11937/12348
    Collection
    • Curtin Research Publications
    Abstract

    This paper reports the feasibility of using embedded Fabry–Pé rot fiber optic sensors to detect and monitor the propagation of cracks and delamination within concrete beams induced by corrosion of the reinforcing bars. In this research, four series of reinforced concrete beams were subjected to varying degrees of corrosion-induced damage by modifying the composition of the concrete mix and subjecting all specimens to the same accelerated corrosion environment. The concept employed in this study involves embedding the Fabry–Pé rot sensor between two reinforcing bars to measure the transverse tensile strains associated with the longitudinal crack along the reinforcing bars (and in severe cases, delamination of the concrete beam) resulting from the radial expansion of the corroding rebars. Excellent correlation was obtained between the Fabry–Pé rot strain data and the amount of steel loss resulting from accelerated corrosion. In addition, the optical sensor strain readings and the reductions in the load-carrying and deflection capacities were also observed to exhibit strong positive correlation highlighting the potential of the optical sensor to monitor the progression of the rebar damage and the loss of structural integrity of the beams resulting from the extensive corrosion.The technique used in this study demonstrates the possibility of detecting corrosion-induced damage in reinforced concrete structures, particularly those where visual inspection is not possible.

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