A numerical investigation into the effects of parabolic curvature on the buckling strength and behaviour of stiffened plates under in-plane compression

Khedmati, Mohammad Reza; Edalat, Pedram

doi:10.1590/s1679-78252010000300002

Cited by 15 publications

(7 citation statements)

References 9 publications

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“…Anyway, Becker [5] insisted strongly that there is a serious need for additional test data on stiffened curved panels to really get insight of the influence of the numerous parameters. Recently, the problem of stiffened curved plates showed a renewed interest by means of finite element modeling, for example in the works of Cho et al [9], Khedmati & Edalat [10] and Park et al [11]. Their work consists in parametric studies where several parameters are varied to clarify their influence on the behavior of curved stiffened plates.…”

Section: Introductionmentioning

confidence: 99%

“…The criterion is thus reached when the actual residual is lower than 0.5 % of the initial residual which is appropriate for most engineering applications. The effect of curvature is investigated via three important parameters (initial imperfection, aspect ratio and the relative flexural stiffness of the stiffener), issued from the parametric study on stiffened panels by Grondin et al[18]; Ghavami et al[19] and on parabolic curved panels by Khedmati & Edala[10].…”

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confidence: 99%

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Buckling of stiffened curved panels under uniform axial compression

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Douthe

Sab

et al. 2014

Journal of Constructional Steel Research

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In bridge construction, the use of stiffened plates for box-girder or steel beams is common day to day practice. The advantages of the stiffening from the economical and mechanical points of view are unanimously recognized. For curved steel panels, however, applications are more recent and the literature on their mechanical behaviour including the influence of stiffeners is therefore limited. Their design with commercial finite element software is significantly time-consuming, which reduces the number of parameters which can be investigated in an optimization procedure. The present paper is thus dedicated to the study of the behaviour of stiffened curved panels under uniform longitudinal compression. It addresses the linear buckling and the ultimate strength which are both influenced by the coupled effects of curvature and stiffening. It finally proposes a design methodology based on that for stiffened flat plates adopted by European Standards and a column-like behaviour

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Buckling of stiffened curved panels under uniform axial compression

Tran

Douthe

Sab

et al. 2014

Journal of Constructional Steel Research

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“…The accuracy of the response is also checked by the relative mean absolute error (RMAE): These statistical remarks being made, it is remarkable that all parameters are found significant in Eq. 10. In decreasing order, the most significant parameters are the curvature (X 4 ), the height of the stiffeners (X 6 ), the thickness of the panel (X 3 ), the distance between stiffeners (X 5 ), the width of the panel (X 2 ), the thickness of the stiffeners (X 7 ) and finally the length of the panel (X 1 ) whose influence is very limited (no more than ±3 % of the total strength).…”

Section: Evaluation Of the Ultimate Strengthmentioning

confidence: 99%

“…More recent parametric studies based on numerical examples and the finite element modelling (e.g. Cho et al [9], Khedmati & Edalat [10] or Park et al [11]) investigated and quantified the influence of the main parameters on the ultimate strength of curved stiffened plates. They however did not lead to a practical criterion for the evaluation of the resistance of such panels which is therefore still an open question.…”

Section: Introductionmentioning

confidence: 99%

A preliminary design formula for the strength of stiffened curved panels by design of experiment method

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Douthe

Sab

et al. 2014

Thin-Walled Structures

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International audienceIn bridge construction, the use of stiffened plates for box-girder or steel beams is common day to day practice. The advantages of the stiffening from the economical and mechanical points of view are unanimously recognized. For curved steel panels, however, applications are more recent and the literature on their mechanical behaviour including the influence of stiffeners is therefore limited. Their design with actual finite element software is possible but significantly time-consuming and this reduces the number of parameters which can be investigated to optimise each panel. The present paper is thus dedicated to the development of a preliminary design formula for the determination of the ultimate strength of stiffened cylindrical steel panels. This approximate formula is developed with the help of a design of experiment method which has been adapted from the current statistical knowledge. This method is first presented, and its feasibility as well as its efficiency are illustrated through an application to the reference case of unstiffened curved panels. Then, the case of stiffened curved panels is investigated and a preliminary design formula is developed. The ease of use of this formula for preliminary design is finally illustrated in a cost optimisation problem

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“…It hence is the topic of concern for researchers for over several years. Several researchers have investigated the buckling behaviour of laminated panels responding to uniform edge loads (Reddy and Phan, 1985;Khedmati and Edalat, 2010;Mirzaei et al, 2015;Sayyad and Ghugal, 2014;Sayyad et al, 2016;Singh and Chakrabarti, 2012;Bourada et al, 2019).…”

Section: Introductionmentioning

confidence: 99%