Imperfection analysis on the patch loading resistance of girders with open section longitudinal stiffeners

Kövesdi, Balázs; Mecséri, Balázs József; Dunai, László

doi:10.1016/j.tws.2017.11.030

Cited by 19 publications

(13 citation statements)

References 18 publications

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“…5, which is always the local web crippling of the subpanels between the loaded flange and the upper longitudinal stiffener. The test programme has been separately published with all details in [17]. The main conclusions of the test results were that relatively small stiffeners are strong enough to localise the failure mode within the web subpanel and eliminate global buckling of the entire web.…”

Section: Development Of the Numerical Modelmentioning

confidence: 99%

Patch loading resistance of slender plate girders with multiple longitudinal stiffeners

Kövesdi

Dunai

2023

Steel Construction

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There is currently no reliable and simple design method available in international literature for the determination of the patch loading resistance of slender plate girders having multiple longitudinal stiffeners. The current research focuses on the patch loading resistance of girders having multiple longitudinal stiffeners. An advanced numerical model is developed and verified by own laboratory test results. A numerical parametric study is executed to investigate the load‐carrying capacity of girders having typical bridge geometries. Analysing the numerical simulation results, the structural behaviour obtained is classified based on the stiffener stiffness. Effect of the different geometrical parameters on the patch loading resistance is evaluated with special focus on the stiffener stiffness and distance between the longitudinal stiffeners. The failure modes depending on stiffener stiffness are investigated and the local buckling type failure is characterised by minimum stiffness. For this specific failure mode, an improved design method is developed, giving reliable resistance within the analysed parameter range. The presented resistance model is consistent with the design philosophy of EN 1993‐1‐5. The applicability of the improved design equation has been investigated for multiple stiffener places in unequal distances, which is the common case in praxis, and for bending and transverse force (M–F) interaction.

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Section: Development Of the Numerical Modelmentioning

confidence: 99%

Patch loading resistance of slender plate girders with multiple longitudinal stiffeners

Kövesdi

Dunai

2023

Steel Construction

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“…Thus the applied imperfections are highly important for the patch loading resistance calculation as proved by Kövesdi et al [17], a detailed imperfection sensitivity analysis is executed before the numerical parametric study. The analysed imperfections shapes for a specimen having one longitudinal stiffener are presented in Fig.…”

Section: Materials Model and Imperfectionsmentioning

confidence: 99%

“…The most detrimental imperfection layout is selected for the determination of the patch loading resistance and it was used in the further numerical parametric study. More detailes on the imperfection sensitivity analysis can be found in [17].…”

Section: Materials Model and Imperfectionsmentioning

confidence: 99%

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Patch Loading Resistance of Slender Plate Girders with Multiple Longitudinal Stiffeners

Kövesdi

Dunai²

2022

ce papers

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There is currently no reliable and simple design method available in international literature for the determination of the patch loading resistance of slender plate girders having multiple longitudinal stiffeners. Previous investigations focused mainly on girders having one longitudinal stiffener, which is not the common case for box‐girder bridges. Therefore, the current research – partly published in this paper – has a focus on the patch loading resistance of slender web girders having multiple longitudinal stiffeners. An advanced numerical model is developed and verified by own laboratory test results to determine the patch loading resistance. A numerical parametric study is executed to investigate the load‐carrying capacity of girders having typical bridge geometries. Analysing the numerical simulation results the structural behavior obtained is classified based on the stiffener stiffness. Effect of the different geometrical parameters on the patch loading resistance is evaluated with special focus on the stiffener stiffness and distance between the longitudinal stiffeners. The failure modes depending on the stiffener stiffness are investigated and the local buckling type failure is characterised by a minimum stiffness. For this specific failure mode an improved design method is developed for girders having multiple longitudinal stiffeners giving reliable resistance for the analysed cases within the analysed parameter range. The presented resistance model is consistent with the design philosophy of EN1993‐1‐5.

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“…However, there are still some uncovered issues as for instance, in the patch loading case the available formulae were developed for short loading lengths [15][16][17]. Some works related to this influence have been presented for ultimate load capacities rather than for elastic critical buckling loads [18][19][20][21][22][23][24]. Therefore, this paper aims at investigating the influence of the loading length on the buckling coefficients and transition rigidity for longitudinally stiffened girders subjected to patch loading.…”

Section: Figurementioning

confidence: 99%

Influence of the patch loading length on the buckling coefficient of longitudinally stiffened plate girders

Loaiza¹,

Graciano²,

Chacón³

2019

Rev.Fac.Ing.Univ.Antioquia

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This paper aims at investigating the effect of the bearing length on the elastic buckling behavior of longitudinally stiffened girder webs subjected to patch loading. Buckling coefficients are calculated by means of linear finite element analysis. Furthermore, a parametric analysis is performed to study the influence of other geometric parameters such as the panel aspect ratio and the geometrical properties of the longitudinal ones. Buckling coefficients of longitudinally stiffened girder webs are computed numerically. The results show that the buckling coefficient for longitudinally stiffener girder webs increases with the loading length. However, this conclusion is considerably affected by other factors such as the position of the stiffener, and panel aspect ratios.

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Imperfection analysis on the patch loading resistance of girders with open section longitudinal stiffeners

Cited by 19 publications

References 18 publications

Patch loading resistance of slender plate girders with multiple longitudinal stiffeners

Patch loading resistance of slender plate girders with multiple longitudinal stiffeners

Patch Loading Resistance of Slender Plate Girders with Multiple Longitudinal Stiffeners

Influence of the patch loading length on the buckling coefficient of longitudinally stiffened plate girders

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