Experimental investigation of built-up cold-formed steel section battened columns

Dabaon, Mohamed; Ellobody, Ehab; Ramzy, Khaled

doi:10.1016/j.tws.2015.03.001

Cited by 70 publications

(23 citation statements)

References 13 publications

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“…al. [3][4][5] provides an overview of the effect of pined-end and fixed-end plotting on the behaviour of coldformed, where conservatively fixed-end support provides significant results for the behaviour of cold-formed steel members.…”

Section: Parametric Studymentioning

confidence: 99%

Profile of cold-formed steel for compression member design a basic combination performance

Septiropa

Osman²,

Rahman³

et al. 2018

IJET

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Experiment previously showed several findings that the strength of cold-formed steel cross-section are not the same, where web strength and flange strength do not give the same response when receiving the axial load. This occurs not only because of a shift in the center point of the force due to deformation of the cross section, but also due to different strengths in cross-section, especially on the web section and flange section. To find out more details of this case, the experiment carried out the tensile test for mechanics property and compression test with an axial load to find which parts are weaknesses, then used as a reference in combining the profile. The compression test results showed significant increase in compression capability between single profile with double profile back to back (Dbb) or double profile flange to flange (Dff) with ratio 1: 2.24 and 1: 2.44 respectively. There is a non-linear increase in the value of Aeff and Ieff when becomes combine profiles (double, quadruple, hexatruple), so this can be the basis for increasing the combine profile capacity to be able to withstand larger loads. This experiment can show a basic performance of CFS, where are weak section parts of a profile can be used as a reference to put combine profile to increase compression capacity. With a numerical analysis approach compared to the experimental results, the combination of Cold-formed steel profile is established as a column for the low-rise building structure.

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Section: Parametric Studymentioning

confidence: 99%

Profile of cold-formed steel for compression member design a basic combination performance

Septiropa

Osman²,

Rahman³

et al. 2018

IJET

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show abstract

“…Chan et al (2015) assessed the applicability of the current cross-section classification system under axial compression for cold-formed and built-up high-strength carbon and stainless steel stub columns and proposed new slenderness parameters and limits. Dabaon et al (2015) presented the experimental results and design of built-up CFS section battened columns made of two CFS plain channels placed back to back at a varied spacing of intersection. Zhang and Young (2012, 2015) conducted tests on CFS I-shaped open sections with edge and web stiffeners followed by proposed a modified DSM equations for the CFS built-up open section columns with longitudinal stiffeners, based on the different sectional configuration assumptions to achieve a rational buckling.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on behaviour and design of cold-formed steel built-up column composed of lipped sigma channels

Anbarasu¹

2019

Advances in Structural Engineering

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This article aims at investigating the structural response and predicting the ultimate resistance of cold-formed steel built-up columns composed of lipped sigma sections with pinned ends. For this purpose, a numerical model is established by using the finite element code ABAQUS. The finite element models include geometric, material nonlinearity. The effects of initial local and overall geometric imperfections have been taken into consideration in the finite element modelling. The results of the nonlinear finite element analysis were validated with the available experimental results present in the literature. A parametric study was carried out using the developed finite element model to study the effect of member slenderness, height-to-width ratio and depth of trapezoidal stiffener on the ultimate resistance of cold-formed steel closed built-up columns. On the basis of the parametric results, presented herein, appropriateness of the current direct strength method in the North American Specification for cold-formed steel columns is assessed. Based on such comparison, design expression is proposed to provide reliable design strength prediction of cold-formed steel built-up column composed of lipped sigma sections and verified through reliability analysis.

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“…The most common built-up section is the combination of two channels placed back-to-back. Either they were welded together and researched by Dabaon, M. [5,6] and Hosseini Hashemi, B. [7] or connected through self-tapping screws and tested by Stone, T. A.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of Built-Up Columns Composed of Four Cold-Formed Square Steel Tubes

Chen

Xia

et al. 2019

Applied Sciences

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This study presents an experimental investigation into the mechanical performance of built-up columns composed of four cold-formed square steel tubes under axial load. The four tubes were assembled together with several C-shaped connectors through two self-tapping screws in each junction. The influence of parameters including spacing between tubes, type of connectors and transverse diaphragm were analyzed based on the failure modes, ultimate loads, load-displacement relationships and load-strain relationships measured in the tests. Moreover, a further numerical analysis was carried out to study the effect of the number of connectors, web height of connectors and installing connectors at column ends by means of the verified finite element models. Finally, the numerical results were compared with the strengths predicted by the AISI-S100-2012 code. Results show that the performance of built-up columns can be influenced by the change in the number of connectors and ratio of web height of connectors to spacing between tubes as well as the installation of connectors at column ends. In addition, the current AISI-S100-12 specifications do not provide a good prediction of the built-up columns composed of four cold-formed square steel tubes.

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Experimental investigation of built-up cold-formed steel section battened columns

Cited by 70 publications

References 13 publications

Profile of cold-formed steel for compression member design a basic combination performance

Profile of cold-formed steel for compression member design a basic combination performance

Numerical investigation on behaviour and design of cold-formed steel built-up column composed of lipped sigma channels

Mechanical Performance of Built-Up Columns Composed of Four Cold-Formed Square Steel Tubes

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