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

Exploring the impact of chloride-induced corrosion on seismic damage limit states and residual capacity of RC structures
Exploring the impact of chloride-induced corrosion on seismic damage limit states and residual capacity of RC structures
A nonlinear finite element (FE) framework for time-dependent capacity assessment of corroded rectangular RC columns is developed. The proposed nonlinear FE model includes the impact of corrosion on inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement. The proposed nonlinear 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 nonlinear 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 for seismic fragility analysis of corroded structures the damage limit states should be considered as time-variant parameters.
reinforced concrete, corrosion, Seismic hazard, Incremental dynamic analysis, inelastic buckling
1573-2479
Afsar Dizaj, Ebrahim
d15c5b4e-56cc-4598-91c6-36083da764e7
Madandoust, Rahmat
0aa426f4-d11c-47d4-81a6-10ec64fbf7c5
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Afsar Dizaj, Ebrahim
d15c5b4e-56cc-4598-91c6-36083da764e7
Madandoust, Rahmat
0aa426f4-d11c-47d4-81a6-10ec64fbf7c5
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d

Afsar Dizaj, Ebrahim, Madandoust, Rahmat and Kashani, Mohammad (2017) Exploring the impact of chloride-induced corrosion on seismic damage limit states and residual capacity of RC structures Structure and Infrastructure Engineering

Record type: Article

Abstract

A nonlinear finite element (FE) framework for time-dependent capacity assessment of corroded rectangular RC columns is developed. The proposed nonlinear FE model includes the impact of corrosion on inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement. The proposed nonlinear 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 nonlinear 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 for seismic fragility analysis of corroded structures the damage limit states should be considered as time-variant parameters.

PDF Afsar et al_AcceptedManuscript - Accepted Manuscript
Restricted to Repository staff only until 12 June 2018.

More information

Accepted/In Press date: 12 June 2017
Keywords: reinforced concrete, corrosion, Seismic hazard, Incremental dynamic analysis, inelastic buckling
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 411742
URI: http://eprints.soton.ac.uk/id/eprint/411742
ISSN: 1573-2479
PURE UUID: 1e95a109-dd57-4113-b3da-8f1007e85865
ORCID for Mohammad Kashani: ORCID iD orcid.org/0000-0003-0008-0007

Catalogue record

Date deposited: 23 Jun 2017 16:31
Last modified: 17 Jul 2017 13:23

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Contributors

Author: Ebrahim Afsar Dizaj
Author: Rahmat Madandoust

University divisions

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