Longitudinally stiffened plates in Eurocode 3: Calculation of the global critical buckling stress

Galea, Y.; Martin, Pierre-Olivier

doi:10.1016/j.jcsr.2010.05.001

Cited by 12 publications

(3 citation statements)

References 3 publications

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“…The main requirement is that the four edges have to be considered as simply supported, without consideration of the local torsional stiffness provided either by the adjacent flanges or the transverse stiffeners. Any relevant method can then be used to calculate s cr,p , including finite element analysis or dedicated software such as EBPlate [3], [4]. Using these latter modern tools, it is possible to account for the torsional inertia of the stiffeners, which increases the critical stress obtained in the elastic buckling analysis and, consequently, the final compressive strength of the plate.…”

Section: Introductionmentioning

confidence: 99%

Effect of the torsional stiffness of closed‐section stiffeners on plate buckling in Eurocode 3, Part 1‐5

Martin

Nguyen

Davaine³

2019

Steel Construction

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Longitudinally stiffened plates are commonly used to increase the resistance to plate buckling. Closed cross‐section stiffeners provide high values of the torsional stiffness and thus are very efficient to avoid their premature lateral torsional buckling. With the current software tools, it is easy to assess the critical stress for the elastic global mode, taking into account the beneficial effect of these high values of torsional stiffness for stiffeners with closed cross‐sections. However, the torsional stiffness of longitudinal stiffeners is not considered in the analytical formula proposed by Annex A of EN 1993‐1‐5 for the assessment of the global buckling critical stress. A study is presented here where the effect of the torsional stiffness of longitudinal stiffeners on the plate buckling criterion of EN 1993‐1‐5 has been analysed. 216 configurations of stiffened plates were calculated through finite element GMNIA non linear analyses. Their compressive strength thus obtained were compared to their resistance to plate buckling as predicted by EN 1993‐1‐5, either by considering their torsional stiffness with EBPlate software or by completely ignoring it. The study clearly shows that EN 1993‐1‐5 leads to unsafe results when the torsional stiffness is taken into account in the calculations. Finally, it is concluded that the torsional stiffness of longitudinal stiffeners has to be ignored in the design of stiffened plates according to EN 1993‐1‐5.

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Section: Introductionmentioning

confidence: 99%

Effect of the torsional stiffness of closed‐section stiffeners on plate buckling in Eurocode 3, Part 1‐5

Martin

Nguyen

Davaine³

2019

Steel Construction

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“…According to the Croatian National Annex for steel bridges (HRN EN 1993-2:2014/NA, Section 2.19, [13]), the reduced stress method is obligatory for buckling verification in ULS or for characteristic combination in SLS. This method limits compression stress in the plate, as opposed to using effective plate section properties [14]. It assumes a linear stress distribution up to the stress limit of the plate element which buckles first [9].…”

Section: Commentary On Provisions From En 1993-1-5mentioning

confidence: 99%

Optimisation of compressed stiffened flanges in bridge box girder cross-section

2017

JCE

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Optimization of compressed stiffened flanges in bridge box girder cross section Due to bending, flanges of steel box girder cross sections act as compression plates and require stiffeners. Using stability evidence from EN 1993-1-5, a parametric study was performed for six different types of stiffeners. The obtained diagrams show design buckling resistance stress for various plate width and thickness values, and the type and number of stiffeners. Furthermore, an optimization process was performed to find the most suitable types and number of stiffeners, depending on the acting design compression force. Optimization parameters are the minimum steel area and minimum number of stiffeners. Optimizacija ukrućenih tlačnih pojasnica u sandučastom presjeku mosta Uslijed savijanja, pojasnice čeličnih sandučastih presjeka grednih mostova ponašaju se kao tlačni pločasti elementi i zahtijevaju ukrućenja. Koristeći dokaz stabilnosti prema EN 1993-1-5 provedena je parametarska analiza za 6 različitih tipova ukrućenja. Dobiveni dijagrami pokazuju računsko naprezanje otpornosti na izbočivanje za različite širine i debljine ploča, te tip i broj ukrućenja. Nadalje, proveden je optimizacijski postupak kojim se pronalazi najpovoljniji tip i broj rebara ovisno o djelujućoj računskoj tlačnoj sili. Optimizacijski parametri su minimalna površina čelika i minimalni broj rebara.

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“…Relevant codes have given specifications for buckling analysis and design of stiffened panels based on the available literature. Galé a and Martin [3] presented buckling of stiffened panels in accordance to Eurocode 3 Part 1.5 and developed a general calculation method for critical buckling stress with the help of EBPlate software. Various approaches have been used recently to solve the elastic buckling problems of stiffened panels [4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A Contribution to Analytical Solutions for Buckling Analysis of Axially Compressed Rectangular Stiffened Panels

Ibeabuchi¹,

Ibearugbulem²,

Njoku³

et al. 2021

1169-7954

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Analytical solution to the buckling problems of stiffened panels subjected to in-plane compressive loads is presented. The total potential energy functional of stiffened panel is obtained by the summation of that of a line continuum and stiffened panel derived from elastic principles of mechanics. Minimizing the resulting equation with respect to deflection coefficient and rearranging gives the expression for obtaining the buckling load of stiffened panel. Exact deflection functions were substituted directly in the new solution and various edge conditions were considered in this analysis. Obtained results were compared with analytical results of previous works. The method is computationally efficient for complex edge conditions and gives high numerical accuracy.

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Longitudinally stiffened plates in Eurocode 3: Calculation of the global critical buckling stress

Cited by 12 publications

References 3 publications

Effect of the torsional stiffness of closed‐section stiffeners on plate buckling in Eurocode 3, Part 1‐5

Effect of the torsional stiffness of closed‐section stiffeners on plate buckling in Eurocode 3, Part 1‐5

Optimisation of compressed stiffened flanges in bridge box girder cross-section

A Contribution to Analytical Solutions for Buckling Analysis of Axially Compressed Rectangular Stiffened Panels

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