Experimental and numerical analysis of stiffened curved plates as bottom flanges of steel bridges

Piculin, Sara; Može, Primož

doi:10.1016/j.jcsr.2019.105822

Cited by 14 publications

(12 citation statements)

References 30 publications

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“…An extensive parametric study was conducted on flat and curved longitudinally stiffened panels loaded with uniform compressive stresses. The numerical model used in the study was validated with experimental test results [8] and numerical results from the literature, see [9]. The study includes a variety of parameters, such as the curvature parameter and aspect ratio of the panel, the slenderness of the subpanels and the size of the longitudinal stiffeners.…”

Section: Test Resultsmentioning

confidence: 99%

“…Experimental tests on large-scale specimens were carried out in the Laboratory of Structural and Traffic Engineering, Faculty of Civil and Geodetic Engineering, University of Ljubljana. Test procedure and all the relevant results are described in detail in [8]. The aim of the tests was to investigate the ultimate resistance and structural behaviour of longitudinally stiffened curved panels in compression.…”

Section: Experimental Testsmentioning

confidence: 99%

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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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Section: Test Resultsmentioning

confidence: 99%

Section: Experimental Testsmentioning

confidence: 99%

New Design Proposal for Stiffened Curved Plates under Compression

Piculin¹,

Može²

2021

ce papers

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“…Since the calculation of the effective properties of the stiffened curved bottom flange W eff exceeds the scope of the current design standards, a thorough study of the buckling behaviour of the bottom flange as an individual element subjected to pure axial compression was carried out and a simplified analytical resistance model proposed in [8]. The model is in line with the current standard procedure for flat plate structures, where the effective area of the stiffened curved plate is calculated using Eq.…”

Section: Articlementioning

confidence: 99%

“…The reduction factor ρ c for the global buckling behaviour should be obtained by interpolation between columnand shell-type buckling according to EN 1993-1-5 [2], which is described in detail and explained in [8]. Hence, the design strategy is to consider conservatively the whole curved part of the cross-section as a "bottom flange" subjected to a uniform compression, thus enabling the use of the aforementioned proposed rules.…”

Section: Articlementioning

confidence: 99%

Steel box‐girder bridge decks with curved bottom flange

et al. 2020

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Nominated for the Professor Eduardo de Arantes e Oliveira Award at XII Conference on Steel and Composite Construction in Coimbra 2019 This paper presents the results of a numerical parametric study that investigated the M‐V interaction behaviour of box‐girder bridge deck specimens. The study made use of an advanced numerical model that was previously verified against the experimental results. Based on the numerical results and the current rules for trapezoidal box girders, new design models are proposed for predicting the bending and shear resistance of cross‐sections with a curved bottom flange. Additionally, the force‐based M‐V interaction equation proposed by Jáger et al. [1], adopted in the new version of EN 1993‐1‐5 [2], was verified and slightly modified to fit this type of cross‐section.

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“…The research presented in this article deals with the stability behaviour of longitudinally stiffened, cylindrically curved plates under in-plane uniform compressive stresses. The presented work is part of an extensive research project with experimental tests on nine isolated, stiffened, curved panels, which were performed by the authors and described in detail in [21][22][23]. Together with two experimental investigations performed by Ljubinkovic et al [24,25], the three studies provide a comprehensive basis for the verification of numerical models and proposed design methods.…”

Section: Introductionmentioning

confidence: 99%