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Reliability-based approach to the robustness of corroded reinforced concrete structures

Reliability-based approach to the robustness of corroded reinforced concrete structures Thumbnail


Eduardo S. Cavaco

Joan R. Casas


Currently, decisions on the maintenance and repair of infrastructural assets, structures in particular, are mostly based on the results of inspections and the resulting condition index, neglecting system robustness and therefore not making optimal use of the limited funds available. This paper presents a definition and a measure of structural robustness in the context of deteriorating structures which are compatible with asset management systems for optimal maintenance and repair planning. The proposed index is used to define the robustness of existing reinforced concrete (RC) structures to rebar corrosion. Structural performance and the corresponding reliability index are assessed using combined advanced reliability and structural analysis techniques. Structural analysis explicitly includes deterioration mechanisms resulting from corrosion, such as reinforcement area reduction, concrete cracking, and bond deterioration. The first-order reliability method, combined with a response surface algorithm, is used to compute the reliability index for a wide range of different corrosion levels, resulting in a fragility curve. Finally, structural robustness is computed and discussed based on the results obtained. A robustness comparison of different structures can then be used to determine structural types more tolerant to corrosion and these results used for planning maintenance and repairs.


Cavaco, E. S., Neves, L. A., & Casas, J. R. (2017). Reliability-based approach to the robustness of corroded reinforced concrete structures. Structural Concrete, 18(2), 316-325.

Journal Article Type Article
Acceptance Date Jul 21, 2016
Publication Date Feb 27, 2017
Deposit Date Sep 27, 2017
Publicly Available Date Sep 27, 2017
Journal Structural Concrete
Print ISSN 1464-4177
Electronic ISSN 1751-7648
Publisher Ernst und Sohn
Peer Reviewed Peer Reviewed
Volume 18
Issue 2
Pages 316-325
Keywords Robustness, Reliability, Damage, Reinforced Concrete,
Public URL
Publisher URL
Additional Information This is the peer reviewed version of the following article:"Reliability-based approach to the robustness of corroded RC structures”, Structural Concrete, Vol 18, Issue 2, which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.


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