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Exploring the impact of chloride-induced corrosion on seismic damage limit states and residual capacity of reinforced concrete structures

Exploring the impact of chloride-induced corrosion on seismic damage limit states and residual capacity of reinforced concrete structures
Exploring the impact of chloride-induced corrosion on seismic damage limit states and residual capacity of reinforced concrete structures

A non-linear finite element (FE) framework for time-dependent capacity assessment of corroded rectangular reinforced concrete (RC) columns is developed. The proposed non-linear FE model includes the impact of corrosion on inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement. The proposed non-linear FE model is validated against a set of experimental data and then extended to evaluate the impact of corrosion on damage limit states to be used in seismic performance and evaluation of corroded structures. This is done through a parametric study on hypothetical RC columns, varied in axial force ratios, mass loss ratios, cover crack widths and confinement levels. Moreover, the application of the proposed model in seismic collapse capacity assessment of corroded structures is shown through non-linear dynamic analyses of prototype columns. Results show that, depending on the axial force ratio, corrosion changes the failure mechanism of the columns. The results of this study suggest that in seismic fragility analysis of corroded structures, the damage limit states should be considered as time-variant parameters.

capacity loss, Corrosion, crack width, cyclic degradation, damage limit state, ductility loss, incremental dynamic analysis, inelastic buckling
1573-2479
714-729
Afsar Dizaj, Ebrahim
d15c5b4e-56cc-4598-91c6-36083da764e7
Madandoust, Rahmat
0aa426f4-d11c-47d4-81a6-10ec64fbf7c5
Kashani, Mohammad M.
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Afsar Dizaj, Ebrahim
d15c5b4e-56cc-4598-91c6-36083da764e7
Madandoust, Rahmat
0aa426f4-d11c-47d4-81a6-10ec64fbf7c5
Kashani, Mohammad M.
d1074b3a-5853-4eb5-a4ef-7d741b1c025d

Afsar Dizaj, Ebrahim, Madandoust, Rahmat and Kashani, Mohammad M. (2018) Exploring the impact of chloride-induced corrosion on seismic damage limit states and residual capacity of reinforced concrete structures. Structure and Infrastructure Engineering, 14 (6), 714-729. (doi:10.1080/15732479.2017.1359631).

Record type: Article

Abstract

A non-linear finite element (FE) framework for time-dependent capacity assessment of corroded rectangular reinforced concrete (RC) columns is developed. The proposed non-linear FE model includes the impact of corrosion on inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement. The proposed non-linear FE model is validated against a set of experimental data and then extended to evaluate the impact of corrosion on damage limit states to be used in seismic performance and evaluation of corroded structures. This is done through a parametric study on hypothetical RC columns, varied in axial force ratios, mass loss ratios, cover crack widths and confinement levels. Moreover, the application of the proposed model in seismic collapse capacity assessment of corroded structures is shown through non-linear dynamic analyses of prototype columns. Results show that, depending on the axial force ratio, corrosion changes the failure mechanism of the columns. The results of this study suggest that in seismic fragility analysis of corroded structures, the damage limit states should be considered as time-variant parameters.

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More information

Accepted/In Press date: 12 June 2017
e-pub ahead of print date: 1 August 2017
Published date: 3 June 2018
Keywords: capacity loss, Corrosion, crack width, cyclic degradation, damage limit state, ductility loss, incremental dynamic analysis, inelastic buckling

Identifiers

Local EPrints ID: 419605
URI: https://eprints.soton.ac.uk/id/eprint/419605
ISSN: 1573-2479
PURE UUID: c56b463c-64e3-4995-9ed7-fb8c5ce9c76d
ORCID for Mohammad M. Kashani: ORCID iD orcid.org/0000-0003-0008-0007

Catalogue record

Date deposited: 16 Apr 2018 16:30
Last modified: 14 Mar 2019 01:26

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