Imperfection sensitivity of cylindrically curved steel panels

Martins, João Pedro; Beg, Darko; Sinur, Franc; Silva, L. Simões da; Reis, Ana Waldila de Queiroz Ramiro

doi:10.1016/j.tws.2014.12.014

Cited by 18 publications

(6 citation statements)

References 15 publications

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“…In contrast, the approach to deal with the buckling of plated elements is described in EN 1993-1-5 [2], and shell structures are regulated in EN 1993-1-6 [3]. The stability behavior of beams [4][5][6][7] as well as structures built from curved plates [8][9][10][11][12][13] and shells [14][15][16][17][18][19][20][21][22] have been the interest of research for quite some time, and the available knowledge is extensive. The top and bottom elements of the new cross-section consist of curved elements, which have been the focus of active research as of late [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Buckling Load Capacity of Novel Compound Cross-Sections Used in Crane Construction

Ladinek,

Klapper,

Lang

2023

Applied Sciences

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Although a crane is exposed to a wide range of loads, there is a growing need for a lighter, more slender design. As a result, double girder cranes are becoming single girder cranes, aiming to make the steel structure as light as possible. The optimization potential of the classic design as a hollow-box girder is approaching its end. In order to meet today’s requirements, a new design was developed, which combines beams with curved panels into a new cross-section to be used as the crane’s main girder. Compound cross-sections pose a challenge for the mechanical engineer as there are usually no comparative data available and designing using numerical methods is complex. For this reason, a scaled model was abstracted for which a load determination will be carried out in 2024. This article deals with the finite element calculations for the design of the test specimen. A global numerical analysis was used to determine the buckling load, and several imperfection patterns were investigated. The results revealed that the buckling loads are similar to each other. This finding may lead to the conclusion that the most damaging imperfection pattern has yet to be found, which supports the need for an accompanying series of tests.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Buckling Load Capacity of Novel Compound Cross-Sections Used in Crane Construction

Ladinek,

Klapper,

Lang

2023

Applied Sciences

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“…Several authors showed that curved plates, similar to other types of shell structures, are quite sensitive to imperfections, see e.g. [20]. However, information on the modelling of material and geometric imperfections of stiffened curved plates, a key data for finite element simulations, is rather missing in the current literature.…”

Section: Introductionmentioning

confidence: 99%

“…However, information on the modelling of material and geometric imperfections of stiffened curved plates, a key data for finite element simulations, is rather missing in the current literature. With the exception of the imperfection sensitivity study on unstiffened curved plates performed by Martins et al [20], all existing numerical studies on curved plates have performed a nonlinear analysis, considering exclusively one shape of initial geometric imperfections which may lead to unsafe results. Furthermore, the available parametric studies have never addressed the full range of geometric parameters and stiffener shapes relevant to curved panels in steel bridges.…”

Section: Introductionmentioning

confidence: 99%

Stability behaviour of stiffened curved plates subjected to pure compression

Piculin

Može

2021

Thin-Walled Structures

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“…Actually, the scope of EN 1993-1-5 is limited to flat plated structures. Numerous authors have demonstrated that cylindrically curved panels subjected to compressive stresses behave differently than flat panels of the same dimensions [4], [5]. Both linear buckling and ultimate strength of longitudinally stiffened, cylindrically curved plates are affected by coupled effects of curvature, stiffening and initial imperfections.…”

Section: Introductionmentioning

confidence: 99%

New Design Proposal for Stiffened Curved Plates under Compression

Piculin¹,

Može²

2021

ce papers

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In this paper, the stability behaviour of longitudinally stiffened, transversally curved steel plates under uniform compressive stresses is investigated and new design guidelines are proposed to extend the scope of the current European standards for flat plated structures to stiffened curved plates. For this purpose, a numerical model is built in Abaqus, which is verified with own test results and numerical results from the literature. It incorporates geometric imperfections based on the modification of node coordinates using sinusoidal functions, and is further used in a comprehensive parametric study based on nonlinear numerical analysis (GMNIA). The parametric study investigates the effects of curvature, slenderness of the plate, size of stiffeners and shape of initial imperfections on the ultimate resistance of the stiffened curved plates. From the results, some important conclusions are drawn regarding the structural behaviour and the positive effects of curvature on the cross‐sectional resistance. In particular, it is found that stiffened curved plates are less sensitive to the shape of the initial imperfections compared to flat stiffened plates, and the introduction of curvature generally adds a reserve of resistance to the stiffened panel under compressive stresses. Based on numerical results, design rules are proposed for longitudinally stiffened curved plates subjected to compressive stresses. The rules are in accordance with the formalism of EN 1993‐1‐5 for flat plated structures and follow the effective width concept. The maximum loads obtained from numerical analysis are compared with the new design rules and a good correlation is obtained.

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Imperfection sensitivity of cylindrically curved steel panels

Cited by 18 publications

References 15 publications

Numerical Investigation on the Buckling Load Capacity of Novel Compound Cross-Sections Used in Crane Construction

Numerical Investigation on the Buckling Load Capacity of Novel Compound Cross-Sections Used in Crane Construction

Stability behaviour of stiffened curved plates subjected to pure compression

New Design Proposal for Stiffened Curved Plates under Compression

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