Effect of pitting corrosion on strength of web plates subjected to patch loading

Nakai, Tatsuro; Matsushita, Hisao; Yamamoto, Norio

doi:10.1016/j.tws.2005.09.004

Cited by 97 publications

(29 citation statements)

References 4 publications

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“…Although the distribution of pit corrosion on plate is widely scattered, the shape of the corrosion is typically a circular cone, and the ratio of the diameter to the depth of the cone is in the range of 1 to 8 [3][4][5]. In this study, two types of corrosion damage idealisation are considered: general and pit corrosion.…”

Section: Idealisation Of Corrosion Damagementioning

confidence: 99%

“…It is also assumed that the pitting corrosion is uniformly distributed, but a ects the strength of the plates di erently, depending on the degrees of pitting intensity. Finally, it is assumed that the pit diameter to depth ratio is 8 [3][4][5], and the distance between the centres of adjacent pits is constant.…”

Section: Basic Geometric Properties Of Pitsmentioning

confidence: 99%

“…Marine environment is a sea water environment, and this means that corrosion in marine structures, which are generally fabricated by various grades of steel, is often very severe, not only under sustained immersed condition as in ballast tanks, but also from general exposure to atmospheric conditions [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…The evaluation of the residual strength of members with pitting corrosion is considered to be more di cult than the same evaluation of members with uniform corrosion [1][2][3][4][5][6][7][8][9][10][11][12][13]. Over the past few decades, there have been signi cant developments in computer hardware and Finite Element Analysis (FEA) software.…”

Section: Introductionmentioning

confidence: 99%

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Ultimate compressive strength of deteriorated steel web plate with pitting and uniform corrosion wastage

2016

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Abstract. Steel structural members are likely to be exposed to corrosive environments and thus, corrosion is one of the dominant life-limiting factors of steel structures. Extensive studies on the e ects of pitting and uniform corrosion on the strength performance of steel structural members under a wide variety of loading conditions have been undertaken to assess the relationship between pitting corrosion intensity and residual strength. The aim of this study is to investigate the ultimate compressive strength characteristics of steel web plate elements with pit and uniform corrosion wastage. A series of ABAQUS nonlinear elastic-plastic large deformation nite element analyses are carried out on Ishaped section steel girder models with varying pitting corrosion intensities. Arti cial pitting of di erent intensities is considered on the web plates and a uniform loading is applied vertically on the upper ange section. The ultimate load-carrying capacity of the deteriorated models with di erent levels of uniform thickness loss is also studied. The results are applied to the assessment of the ultimate compressive strength of web plates with di erent pitting corrosion intensities and a uniform loss thickness by developing design formulae that represent the average loss thickness versus the ultimate load-carrying capacity.

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Section: Idealisation Of Corrosion Damagementioning

confidence: 99%

Section: Basic Geometric Properties Of Pitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultimate compressive strength of deteriorated steel web plate with pitting and uniform corrosion wastage

2016

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“…In addition improperly maintained ageing ship structure could finally lead to disastrous casualties in rough seas and heavy weather. Thus, it is important to assess the residual strength of ageing ship structure properly either with corrosion or with other type of defects in order to reflect vessel's inspection and maintenance programme (Nakai et al [1][2][3]; Paik et al [4][5]; 2006; Sharifi and Paik [6][7]; Sharifi [8]; Sharifi and Tohidi [9]). Despite a large number of procedures to keep steel structures from corrosion attack such as painting and galvanizing, there are numerous existing structures which have not preserved so far.…”

Section: Introductionmentioning

confidence: 99%

Ultimate Capacity Assessment of Web Plate Beams With Pitting Corrosion Subjected to Patch Loading by Artificial Neural Networks

Sharifi¹,

Tohidi²

2014

Volume 10 Number 3

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ABSTRACT:Corrosion is an unavoidable phenomenon in ship hull structures and thickness loss of the structural members due to corrosion is a great concern when the integrity of hull structures is considered. It is well known that pitting corrosion occurring on coated hold frames will surely result in a significant degradation of the ultimate strength of these members. Extensive study on the effect of pitting corrosion on structural strength under a wide variety of loading conditions is necessary to assess the relationship between pitting corrosion intensity and residual strength precisely. The aim of the present study is to investigate the ultimate strength characteristics of steel beams with pit and uniform corrosions wastage. Then pitted member will predict with a member that its thickness decreases uniformly in terms of ultimate strength. A series of ABAQUS nonlinear elastic-plastic analyses by Finite Element Method (FEM) has been carried out on I-shape section steel models, varying the degree of pit corrosion intensity. Load-carrying capacity of deteriorated steel beam models with different pit corrosion under patch loading has been estimated using Artificial Neural Network (ANN) method using FE results. The ultimate strength reduction factor due to web pitting corrosion of steel beams is empirically derived by ANNs of the computed results as a function of DOP. Hence, the results of this study can be used for better prediction of the failure of deteriorated steel beams by practice engineers.

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Time-Dependent Reliability Analysis of Corroded Steel Beam

Nie

Wang

2019

KSCE J Civ Eng

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Effect of pitting corrosion on strength of web plates subjected to patch loading

Cited by 97 publications

References 4 publications

Ultimate compressive strength of deteriorated steel web plate with pitting and uniform corrosion wastage

Ultimate compressive strength of deteriorated steel web plate with pitting and uniform corrosion wastage

Ultimate Capacity Assessment of Web Plate Beams With Pitting Corrosion Subjected to Patch Loading by Artificial Neural Networks

Time-Dependent Reliability Analysis of Corroded Steel Beam

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