A constrained finite strip method for open and closed cross-section members

Djafour, Mustapha; Djafour, N.; Megnounif, Abdellatif; Kerdal, D.

doi:10.1016/j.tws.2010.07.004

Cited by 16 publications

(3 citation statements)

References 4 publications

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“…This approach requires a two-step analysis procedure that may lead to a pure mode solution and an all-mode solution. The pure mode calculation was performed using the constrained Finite Strip Method (cFSM) [6] in order to find the critical buckling half-wavelength L crD which is then applied in a simple finite strip method to determine the elastic buckling load P crD . In addition, it is worth noting that the cFSM pure distortional mode calculation uses a sharp-cornered model, while the conventional FSM analysis employs a model with rounded-corners.…”

Section: A Comparative Study Of Design Methods For Distortional Bucklingmentioning

confidence: 99%

“…In fact, a reliable method for computing the elastic critical moment or load of the three basic buckling modes plays a crucial role in assessing the load-carrying capacity of thin-walled structural members. Analytical formulas or numerical methods, such as the finite element method [4][5] or finite strip method [6][7], may be used to perform an accurate evaluation of the elastic critical moment (load). Moreover, analytical expressions for the evaluation of the elastic local and Euler buckling stresses are available in Timoshenko and Gere [8], whereas the distortional buckling prediction can usually be based on an analytical model of flange-lip combination with rotational and translational stiffness at the junction point [9].…”

Section: Introductionmentioning

confidence: 99%

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Calculation of Critical Load for Pure Distortional Buckling of Lipped Channel Columns

Imene¹,

Djelil²,

Djafour³

et al. 2019

Period. Polytech. Civil Eng.

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This paper presents a method that allows calculating the elastic critical stress for the distortional buckling mode, based on the buckling mode classification of typical lipped channel columns. In our case, Cold-Formed Steel Lipped Channel Columns are subjected to compression. Moreover, in order to consolidate the important findings of this work, a comparative study was carried out to assess the reliability of various distortional buckling models that are provided by different design Standards. It was found that the American and Australian approaches, given in the codes of practice, are closer to the Finite Strip Method than to the European method. An analytical solution was proposed for the determination of the distortional buckling stress on the basis of a statistical method; it corresponds to lipped channel sections with a flange width to web width ratio b/h ranging from 0.1 to 1, and a lip width to web width ratio c/h between 0 and 0.5. After comparison with the results given by the finite strip method for pure distortional buckling, it turned out that the proposed approach provides a reasonable prediction for the elastic distortional buckling stress for lipped channel sections subjected to compression. In fact, this method gives better results than the American approach.

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Section: A Comparative Study Of Design Methods For Distortional Bucklingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Calculation of Critical Load for Pure Distortional Buckling of Lipped Channel Columns

Imene¹,

Djelil²,

Djafour³

et al. 2019

Period. Polytech. Civil Eng.

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show abstract

“…Djafour et al [34] improved the constrained the finite strip method by simplifying the derivation of the constraint matrix in the case of combined global and distortional buckling modes. This led to a simple and systematic formulation which allowed the cFSM to compute pure buckling modes for members with open and closed thinwalled cross-sections.…”

Section: Fsm Analysismentioning

confidence: 99%

The Numerical Investigation of Thin-Walled Beams with Modified C-Sections

Grenda

2018

Archives of Mechanical Technology and Materials

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Demand for thin-walled structures has been increasing for many years. Cold- formed, thin-walled channel beams are the subject of presented research. The local elastic buckling and limit load of these beams subjected to pure bending are investigated. This study includes numerical investigation called the Finite Strip Method (FSM). The presented results give a deep insight into behaviour of such beams and may be used to validate analytical models. The number of works devoted to the theory of thin-walled structures has been steadily growing in recent years. It means that is an increasing interest in practical methods of manufacturing cold-formed thin-walled beams with complicated cross-sections, including also beams with web stiffeners. The ratio of transverse dimensions of beam to its wall-thickness is high, therefore, thin-walled beams are prone to local buckling that may interact with other buckling modes. The stability constraints should be always considered when using cold-formed thin-walled beams.

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Advanced computational tools for elastic buckling analysis of cold-formed steel structures

2024

Recent Trends in Cold-Formed Steel Construction

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A constrained finite strip method for open and closed cross-section members

Cited by 16 publications

References 4 publications

Calculation of Critical Load for Pure Distortional Buckling of Lipped Channel Columns

Calculation of Critical Load for Pure Distortional Buckling of Lipped Channel Columns

The Numerical Investigation of Thin-Walled Beams with Modified C-Sections

Advanced computational tools for elastic buckling analysis of cold-formed steel structures

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