Compressive strength of tubular members with localized pitting damage considering variation of corrosion features
Compressive strength of tubular members with localized pitting damage considering variation of corrosion features
Localized pitting corrosion often occurs on marine and offshore structures in the form of patch corrosion with great uncertainties in the location, size and shape. The variation of corrosion features affects ultimate strength of tubular members significantly, but it is still not well understood. This paper presents a numerical study on tubular members of diverse slenderness ratios to clarify the localized pitting effect on ultimate strength. Numerical analyses were performed based on novel models of pitted members that were calibrated against benchmark column tests. Corrosion pits were randomly introduced on the local outside surfaces of members via stochastic simulation, forming corrosion patches varied in the location, size and shape. Numerical results obtained were regressed to propose a unified empirical formula to predict ultimate strength. It turned out that the shape of the corrosion patch has a significant influence on the ultimate strength. The shape change of the patch can alter failure modes of medium length columns. The reduction of ultimate strength is closely related to the shape ratio of the patch besides the volume loss of corroded material. The unified empirical formula incorporating the shape ratio and the volume loss shows a good ability to predict the experimental results.
localized pitting damage, shape effect, stochastic simulation, tubular member, ultimate strength
Wang, Renhua
63446caf-090a-4f3e-b0eb-a5eba2ff8cde
Guo, Haichao
2e83f919-6f69-4686-8b30-4a6d534e8ada
Shenoi, R. Ajit
a37b4e0a-06f1-425f-966d-71e6fa299960
September 2020
Wang, Renhua
63446caf-090a-4f3e-b0eb-a5eba2ff8cde
Guo, Haichao
2e83f919-6f69-4686-8b30-4a6d534e8ada
Shenoi, R. Ajit
a37b4e0a-06f1-425f-966d-71e6fa299960
Wang, Renhua, Guo, Haichao and Shenoi, R. Ajit
(2020)
Compressive strength of tubular members with localized pitting damage considering variation of corrosion features.
Marine Structures, 73, [102805].
(doi:10.1016/j.marstruc.2020.102805).
Abstract
Localized pitting corrosion often occurs on marine and offshore structures in the form of patch corrosion with great uncertainties in the location, size and shape. The variation of corrosion features affects ultimate strength of tubular members significantly, but it is still not well understood. This paper presents a numerical study on tubular members of diverse slenderness ratios to clarify the localized pitting effect on ultimate strength. Numerical analyses were performed based on novel models of pitted members that were calibrated against benchmark column tests. Corrosion pits were randomly introduced on the local outside surfaces of members via stochastic simulation, forming corrosion patches varied in the location, size and shape. Numerical results obtained were regressed to propose a unified empirical formula to predict ultimate strength. It turned out that the shape of the corrosion patch has a significant influence on the ultimate strength. The shape change of the patch can alter failure modes of medium length columns. The reduction of ultimate strength is closely related to the shape ratio of the patch besides the volume loss of corroded material. The unified empirical formula incorporating the shape ratio and the volume loss shows a good ability to predict the experimental results.
Text
Manuscript-R2
- Accepted Manuscript
More information
Accepted/In Press date: 18 June 2020
e-pub ahead of print date: 1 July 2020
Published date: September 2020
Additional Information:
Funding Information:
The first author would like to thank the National Natural Science Foundation of China [grant number 51879124 ] for the financial support, and appreciate Mr. Chaoming Shen from the Engineering Mechanics Laboratory at the Jiangsu University of Science and Technology for his assistance during the experimental study.
Publisher Copyright:
© 2020 Elsevier Ltd
Keywords:
localized pitting damage, shape effect, stochastic simulation, tubular member, ultimate strength
Identifiers
Local EPrints ID: 445549
URI: http://eprints.soton.ac.uk/id/eprint/445549
ISSN: 0951-8339
PURE UUID: aa9ed1e4-0f41-4c36-a3fb-fc7f82b1fd4a
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Date deposited: 15 Dec 2020 17:31
Last modified: 17 Mar 2024 06:09
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Author:
Renhua Wang
Author:
Haichao Guo
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