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Ultimate strength assessment of plated steel structures with random pitting corrosion damage

Ultimate strength assessment of plated steel structures with random pitting corrosion damage
Ultimate strength assessment of plated steel structures with random pitting corrosion damage
Pitting corrosion poses a threat to plated steel structures serving in aggressive corrosion environments. This paper involves numerical studies on the structural behaviour and ultimate strength reduction of plated steel structures due to random pitting damage. Stochastic simulations were used to model the random nature of the pitting corrosion varying pitting shape, depth and distribution. A series of nonlinear analyses were performed on unstiffened plates and stiffened panels to understand the mechanisms of structural collapse due to random pitting damage. Empirical formulae were derived respectively for the prediction of ultimate strength reductions of unstiffened plates and stiffened panels in terms of regression analysis from the numerical results. Random pitting corrosion induces a variation and reduction in ultimate strength, and can lead to a transition in failure mode. The collapse of pitted structures under uniaxial compression has a feature that the onset of plasticity initiates in the areas close to the unloaded edge of the structure, and propagates into a continuous plasticity region linking the pits with highly concentrated stress. The pitted area with intensively stress-concentrated pits undergoes a locally amplified deformation that determines the failure mode, leading to structural failure.
plated steel structure, ultimate strength, pitting corrosion, stochastic simulation
0143-974X
331-342
Wang, Renhua
b51d4670-d7f9-46da-ac54-9c3212af2a78
Shenoi, Ramanand
a37b4e0a-06f1-425f-966d-71e6fa299960
Sobey, Adam
e850606f-aa79-4c99-8682-2cfffda3cd28
Wang, Renhua
b51d4670-d7f9-46da-ac54-9c3212af2a78
Shenoi, Ramanand
a37b4e0a-06f1-425f-966d-71e6fa299960
Sobey, Adam
e850606f-aa79-4c99-8682-2cfffda3cd28

Wang, Renhua, Shenoi, Ramanand and Sobey, Adam (2018) Ultimate strength assessment of plated steel structures with random pitting corrosion damage. Journal of Constructional Steel Research, 143, 331-342. (doi:10.1016/j.jcsr.2018.01.014).

Record type: Article

Abstract

Pitting corrosion poses a threat to plated steel structures serving in aggressive corrosion environments. This paper involves numerical studies on the structural behaviour and ultimate strength reduction of plated steel structures due to random pitting damage. Stochastic simulations were used to model the random nature of the pitting corrosion varying pitting shape, depth and distribution. A series of nonlinear analyses were performed on unstiffened plates and stiffened panels to understand the mechanisms of structural collapse due to random pitting damage. Empirical formulae were derived respectively for the prediction of ultimate strength reductions of unstiffened plates and stiffened panels in terms of regression analysis from the numerical results. Random pitting corrosion induces a variation and reduction in ultimate strength, and can lead to a transition in failure mode. The collapse of pitted structures under uniaxial compression has a feature that the onset of plasticity initiates in the areas close to the unloaded edge of the structure, and propagates into a continuous plasticity region linking the pits with highly concentrated stress. The pitted area with intensively stress-concentrated pits undergoes a locally amplified deformation that determines the failure mode, leading to structural failure.

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ultimate strength assessment-SUBMITTED - Accepted Manuscript
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More information

Accepted/In Press date: 12 January 2018
e-pub ahead of print date: 4 February 2018
Published date: April 2018
Keywords: plated steel structure, ultimate strength, pitting corrosion, stochastic simulation

Identifiers

Local EPrints ID: 417174
URI: http://eprints.soton.ac.uk/id/eprint/417174
ISSN: 0143-974X
PURE UUID: e580ccd2-97d4-46cb-bc11-56253e267a4f
ORCID for Adam Sobey: ORCID iD orcid.org/0000-0001-6880-8338

Catalogue record

Date deposited: 23 Jan 2018 17:30
Last modified: 30 Jan 2020 05:12

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