Eigenvalue analysis of cylindrically curved panels under compressive stresses – Extension of rules from EN 1993-1-5

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

doi:10.1016/j.tws.2013.03.010

Cited by 26 publications

(29 citation statements)

References 15 publications

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“…It should be noted that the cross section area is constant with the changing curvature parameter (A = 25.0 cm 2 for unstiffened and Ast,1 = 25.7 cm 2 , Ast,2 = 27.0 cm 2 for stiffened panels). Observations are very similar to those proven previously by other authors [7,12]. For a fixed aspect ratio, the global curvature increases the buckling stress and also affects the buckling pattern (see Fig.…”

Section: Linear Bucklingsupporting

confidence: 91%

04.10: Analysis of stiffened curved panels in compression: A preliminary numerical study for experimental tests

2017

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The use of different kinds of curved steel panels in bridge design has been increasing in the past few years, but the design recommendations and the knowledge in this field remain scarce. Taking in account the fact that very few experimental tests on life size curved panels have been carried out so far, an experimental study on stiffened and unstiffened curved panels in compression is planned in the near future. For this purpose, a preliminary numerical study on curved panels was conducted, in order to establish an appropriate experimental test setup. This paper deals with a parametric study on stiffened and unstiffened transversally curved steel panels subjected to pure in-plane compression performing linear buckling analysis (LBA) and fully nonlinear analysis with geometric imperfections (GMNIA). Considering that the shell-like structures are highly sensitive to initial imperfections, which significantly lowers their ultimate strength, a linear bifurcation analysis is performed first in order to get the buckling modes of the analysed panels. The buckling shapes are later used as equivalent geometric imperfections in the nonlinear analysis, based on the rules given by EN1993-1-5. Furthermore, a finite element analysis, considering geometric and material nonlinearity with initial imperfections, is conducted in ABAQUS software. Simply supported, transversally curved and longitudinally stiffened panels are analysed in order to determine their resistance to pure in-plane compression. A large parametric study is performed to evaluate the effects of different parameters on the ultimate resistance of the panel. Panels that differ in curvature, aspect ratio and stiffness of the stiffeners are studied. Finally, the numerical results of the parametric study on all, the unstiffened, longitudinally stiffened, both curved and flat panels with the same dimensions are compared. Effects of panel curvature on the critical elastic stress and the ultimate resistance are presented. of panel curvature, aspect ratio and stiffener rigidity on the first buckling mode and panel's ultimate strength are investigated.

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Section: Linear Bucklingsupporting

confidence: 91%

04.10: Analysis of stiffened curved panels in compression: A preliminary numerical study for experimental tests

2017

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“…Results collected in Table 13 show good agreement between the present and reference results from paper [72]. The current investigation is extended to the first 3 values of critical load multiplier comparing to reference.…”

Section: Buckling Of An Axially Loaded Cylindrical Panelsupporting

confidence: 75%

“…This type of problem was analysed, e.g. in studies [8][9][10][11]14,27,33,[67][68][69][70][71][72][73]. Attention must be paid to the definition of nondimensional parameters that represent the curvature and dimension of the panel.…”

Section: Buckling Of An Axially Loaded Cylindrical Panelmentioning

confidence: 99%

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On FEM analysis of Cosserat-type stiffened shells: static and stability linear analysis

Burzyński

2020

Continuum Mech. Thermodyn.

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The present research investigates the theory and numerical analysis of shells stiffened with beams in the framework based on the geometrically exact theories of shells and beams. Shell’s and beam’s kinematics are described by the Cosserat surface and the Cosserat rod, respectively, which are consistent including deformation and strain measures. A FEM approximation of the virtual work principle leads to the conforming shell and beam FE with 6 DoFs (including the drilling rotation for shells) in each node. Examples of static and stability linear analyses are included. Novel design formulas for the stability of stiffened shells are included.

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“…The past several decades have witnessed theoretical and practical research on imperfection sensitivity [1][2][3], elastic critical moments [4][5] and the ultimate strength of a curved plate or/and panel [6][7]. The focus on curved plate studies has mostly concerned idealised structural models and their application to land based structures.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation and development of design formula for cylindrically curved plates on ships and offshore structures

Park¹,

Paik

Seo

2018

Thin-Walled Structures

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Although guidelines exist for evaluation of the buckling strength of curved plates on ships and offshore structures, they do not reflect the effects of curvature or detail their geometric characteristics. From estimations made using cylinder models, it is known that curvature is expected to increase the buckling strength and the ultimate strength of a curved plate. Therefore, it may be designed accordingly. This study aims to clarify and examine the fundamental behaviour of cylindrically curved plates under axial compression and lateral pressure via a series of elasto-plastic large deflection analyses. On the basis of these results, the effects of curvature, initial deflection, slenderness and aspect ratio, boundary conditions and secondary buckling behaviour are discussed and developed with a modified Faulkner's formula to obtain a double beta formula to predict the ultimate strength of the curved plate.

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Eigenvalue analysis of cylindrically curved panels under compressive stresses – Extension of rules from EN 1993-1-5

Cited by 26 publications

References 15 publications

04.10: Analysis of stiffened curved panels in compression: A preliminary numerical study for experimental tests

04.10: Analysis of stiffened curved panels in compression: A preliminary numerical study for experimental tests

On FEM analysis of Cosserat-type stiffened shells: static and stability linear analysis

Numerical investigation and development of design formula for cylindrically curved plates on ships and offshore structures

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