Finite element modeling of cold-formed steel channels with solid and slotted webs in shear

Degtyarev, Vitaliy V.; Degtyareva, Natalia

doi:10.1016/j.tws.2016.02.016

Cited by 23 publications

(15 citation statements)

References 18 publications

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“…However, 1.5 mm of maximum element size in the vertical direction was provided for perforated regions as the meshing can directly govern the accuracy of the FE results as well as the rate of convergence. The same mesh density of the slotted channels was used in the study [6].…”

Section: Finite Element Mesh Refinementmentioning

confidence: 99%

“…The distortional and local buckling behaviour of compression members having staggered perforated webs were investigated and design proposals also presented to deal with web-perforated steel wall studs [4]. The shear strength and behaviour of CFS channels with slotted webs were investigated in [5][6] via numerical and experimental analyses and about 50-70% of the reduction in shear capacity was observed over the solid web channels. In addition, it was found that the shear strength of slotted web channels is hugely relying on the nature of the boundary conditions compared to the solid web channels [6].…”

Section: Introductionmentioning

confidence: 99%

“…The shear strength and behaviour of CFS channels with slotted webs were investigated in [5][6] via numerical and experimental analyses and about 50-70% of the reduction in shear capacity was observed over the solid web channels. In addition, it was found that the shear strength of slotted web channels is hugely relying on the nature of the boundary conditions compared to the solid web channels [6]. Moreover, the behaviour of CFS channels with slotted webs under bending was investigated experimentally with a series of four-point loading structural test and results were checked with the direct strength method equations [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Combined bending and shear behaviour of slotted perforated steel channels: Numerical studies

Degtyareva

Gatheeshgar

Poologanathan

et al. 2019

Journal of Constructional Steel Research

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Cold-formed steel studs and purlins with staggered slotted perforations in webs are used in building structures to produce a better thermal performance of the profiles and for the energy efficiency of structures. On the other hand, the slotted webs result in an unfavourable effect in terms of the structural performance of the element, prominently their shear, bending and combined bending and shear strengths. Relatively little research has been reported on this subject despite its importance. Many research studies have been undertaken to examine the behaviour of conventional cold-formed steel (CFS) channel sections subject to combined bending and shear. To date, however, no research has been carried out to investigate how CFS channels with staggered slotted perforations behave under combined bending and shear actions. An extensive study on this area is therefore essential. Finite element (FE) models of CFS channels with staggered slotted perforations were developed to investigate their combined bending and shear capacity. A parametric study was conducted in detail by developing FE models based on the validation process with available experimental data. This paper presents the FE analysis details of CFS channels with staggered slotted perforations subject to combined 2 bending and shear actions and the FE results. New design equations were also proposed to predict the combined bending and shear capacity of steel channels with staggered slotted perforations.

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Section: Finite Element Mesh Refinementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Combined bending and shear behaviour of slotted perforated steel channels: Numerical studies

Degtyareva

Gatheeshgar

Poologanathan

et al. 2019

Journal of Constructional Steel Research

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“…Regarding the beams used for storage racking systems, because these are cold-formed steel structural elements with thin-walls, distortional buckling failures may occur in bending and the effects of the shearing force must be accurately evaluated in bending, especially in case of the thin-walled elements having opened a cross section [ 14 , 15 ]. An interesting study [ 16 ] presents the results concerning the elastic shear buckling loads and ultimate strength by using numerical simulations of the stresses and strains in case of the finite element models of cold-formed steel channels with slotted webs subjected to shear.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Stiffness of Steel Beam-to-Upright Connections for Storage Racking Systems

Dumbrava

Cerbu

2020

Materials

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The aspects regarding the stiffness of the connections between the beams that support the storage pallets and the uprights is very important in the analysis of the displacements and stresses in the storage racking systems. The main purpose of this paper is to study the effects of both upright thickness and tab connector type on the rotational stiffness and on the capable bending moment of the connection. For this purpose, a number of 18 different groups of beam-connector-upright assemblies are prepared by combining three types of beams (different sizes of the box cross section), three kinds of uprights profiles (with a different thickness of the section walls), and two types of connectors (four-tab connectors and five-tab connectors). Flexural tests were carried out on 101 assemblies. For the assemblies containing the uprights having the thickness of 1.5 mm, the five-tab connector leads to a higher value of the capable moment and higher rotational stiffness than similar assemblies with four-tab connectors. A contrary phenomenon happens in case of the assemblies containing the upright profiles having a thickness of 2.0 mm regarding the capable design moment. It is shown how the safety coefficient of connection depends on both the rotational stiffness and capable bending moment.

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“…These methods most notably are the generalized beam theory or GBT (1), the constrained finite strip method or cFSM (2,3), and the constrained finite element method or cFEM (4,5). The complexity is due to the multiple possible ways of the behaviour and failure, which are typically take place in interaction with each other.…”

Section: Introductionmentioning

confidence: 99%

Understanding the buckling behavior of cold‐formed steel members with slotted web by using cFEM

Ádány

2019

ce papers

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In this paper the buckling of lipped channel cold-formed steel members with slotted web is discussed. These members typically have complicated buckling behaviour, since it is a combination of various types of buckling, such as lateral-torsional buckling, distortional buckling, plate buckling, web crippling, or shear buckling. Though it is practically desirable to separate the various buckling types, this cannot easily be done without a specific numerical tool. Such a tool is the constrained finite element method, which is perhaps the only method at the moment which can separate the behaviour modes, and which can be applied to a wide range of thin-walled problems including members with holes. Separation is primarily performed by geometrical criteria, but further separation is possible on the basis of the stress components. In this paper one beam problem is presented and discussed. Critical loads and corresponding buckled shapes are calculated by allowing various pure and combined deformation modes. The calculations prove the practical advantage of the constrained finite element method.

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Finite element modeling of cold-formed steel channels with solid and slotted webs in shear

Cited by 23 publications

References 18 publications

Combined bending and shear behaviour of slotted perforated steel channels: Numerical studies

Combined bending and shear behaviour of slotted perforated steel channels: Numerical studies

Experimental Study on the Stiffness of Steel Beam-to-Upright Connections for Storage Racking Systems

Understanding the buckling behavior of cold‐formed steel members with slotted web by using cFEM

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