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Nonlinear structural performance and seismic fragility of corroded reinforced concrete structures: Modelling guidelines

Nonlinear structural performance and seismic fragility of corroded reinforced concrete structures: Modelling guidelines
Nonlinear structural performance and seismic fragility of corroded reinforced concrete structures: Modelling guidelines

The current paper provides modelling guidelines for nonlinear analysis and fragility assessment of corrosion-damaged reinforced concrete (RC) structures. A systematic guideline is proposed to model the adverse impact of corrosion on mechanical properties of steel and concrete materials including the negative impact of corrosion on inelastic buckling and low-cycle fatigue (LCF) degradation of reinforcing bars. The proposed fibre-based modelling technique is capable of simulating the spatial variability of localised corrosion and the influence of corrosion on damage states (DS). Corrosion-dependent pushover and cyclic analyses, incremental dynamic analyses (IDAs) and fragility analyses are carried out on three different case studies: (i) a cantilever square RC column, (ii) a cantilever circular RC column and (iii) a RC frame. The analyses results indicate that corrosion significantly affects the DS, sequence of failure mode, flexural capacity and energy dissipation capacity of RC structures. Moreover, alongside the corrosion, the geometry of RC components also affects their failure sequence, cyclic behaviour and energy dissipation capacity. It is shown that increasing degree of corrosion penetration results in the concentration of damage mainly in confined concrete.

Corrosion, IDA, energy dissipation, failure mode, fatigue, fragility
1964-8189
5374-5403
Dizaj, Ebrahim Afsar
b7f5e0f1-52f5-457d-aaaa-f31d95f97e19
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Dizaj, Ebrahim Afsar
b7f5e0f1-52f5-457d-aaaa-f31d95f97e19
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d

Dizaj, Ebrahim Afsar and Kashani, Mohammad (2022) Nonlinear structural performance and seismic fragility of corroded reinforced concrete structures: Modelling guidelines. European Journal of Environmental and Civil Engineering, 26 (11), 5374-5403. (doi:10.1080/19648189.2021.1896582).

Record type: Article

Abstract

The current paper provides modelling guidelines for nonlinear analysis and fragility assessment of corrosion-damaged reinforced concrete (RC) structures. A systematic guideline is proposed to model the adverse impact of corrosion on mechanical properties of steel and concrete materials including the negative impact of corrosion on inelastic buckling and low-cycle fatigue (LCF) degradation of reinforcing bars. The proposed fibre-based modelling technique is capable of simulating the spatial variability of localised corrosion and the influence of corrosion on damage states (DS). Corrosion-dependent pushover and cyclic analyses, incremental dynamic analyses (IDAs) and fragility analyses are carried out on three different case studies: (i) a cantilever square RC column, (ii) a cantilever circular RC column and (iii) a RC frame. The analyses results indicate that corrosion significantly affects the DS, sequence of failure mode, flexural capacity and energy dissipation capacity of RC structures. Moreover, alongside the corrosion, the geometry of RC components also affects their failure sequence, cyclic behaviour and energy dissipation capacity. It is shown that increasing degree of corrosion penetration results in the concentration of damage mainly in confined concrete.

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Dizaj and Kashani_Accepted_Manuscript - Accepted Manuscript
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More information

Accepted/In Press date: 23 February 2021
e-pub ahead of print date: 8 March 2021
Published date: 28 July 2022
Additional Information: Publisher Copyright: © 2021 Informa UK Limited, trading as Taylor & Francis Group.
Keywords: Corrosion, IDA, energy dissipation, failure mode, fatigue, fragility

Identifiers

Local EPrints ID: 450108
URI: http://eprints.soton.ac.uk/id/eprint/450108
ISSN: 1964-8189
PURE UUID: 47b2702b-7901-4720-9af4-51f6f72b8d11
ORCID for Mohammad Kashani: ORCID iD orcid.org/0000-0003-0008-0007

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Date deposited: 09 Jul 2021 16:35
Last modified: 21 Sep 2022 04:01

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Author: Ebrahim Afsar Dizaj

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