Behaviour of cold-formed steel built-up I-section columns composed of four U-profiles

Anbarasu, M.; Venkatesan, Mahadeva S.

doi:10.1177/1369433218795568

Cited by 18 publications

(11 citation statements)

References 30 publications

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“…Innovative sections were investigated in [11,25,26,[53][54][55]. Georgieva et al [11], comprising Σ, channel and track profiles formed a closed section and the suitability of DSM was assessed with the experimental results.…”

Section: Assemblage Of Single Innovative Sectionsmentioning

confidence: 99%

Study on Strength and Behaviour of Cold-Formed Steel Built-up Columns

Sivasathya

Vijayanand

Prabha

et al. 2021

Recent Advancements in Geotechnical Engineering

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Abstract. Cold-formed Steel (CFS), a sort of steel weighing lesser, suits to be a wise choice of material in the construction of steel structures. It has more benefits that indeed make CFS get famous. Effortless installation can be accomplished with the CFS. It also renders a factor that only a few materials show, that is, longevity. Corrosion does not affect the CFS. Employing under moderate loads, CFS finds to be economically feasible when compared with hot-rolled steel. It can be used as compression members comprising single or built-up members. Since a single member cannot sustain the heavy load, the built-up members can be utilized. Open and closed sections are the two sorts of built-up profiles and these profiles show diverse buckling characteristics. This paper lays out a clear outline of the research works done on providing design recommendations to the codes by employing diverse built-up sections. It is reviewed by categorizing the investigated research works based on the kind of CFS sections chosen by each researcher. It was evident from the study that after validation, many researchers have done parametric study on CFS built-up columns to assess the accuracy of the design strength prediction by code specifications. Many codes failed to estimate the section’s ultimate capacity accurately as there are no specific design equations.

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Section: Assemblage Of Single Innovative Sectionsmentioning

confidence: 99%

Study on Strength and Behaviour of Cold-Formed Steel Built-up Columns

Sivasathya

Vijayanand

Prabha

et al. 2021

Recent Advancements in Geotechnical Engineering

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“…Figure 8 illustrates the modelling of screw connection between the lipped channel and batten plates. The beam connector of CONN3D2 element types, with two nodes and 6 degrees of freedom per node, have been used to model the self-driving screws (Anbarasu and Venkateshan, 2018; Jeyaragan and Mahendran, 2008).…”

Section: Fe Modellingmentioning

confidence: 99%

Behaviour of cold-formed steel built-up battened columns composed of four lipped angles: Tests and numerical validation

Anbarasu¹

2019

Advances in Structural Engineering

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This article mainly investigates the behaviour and strength of built-up battened box column composed of lipped angles under axial compression. Ten specimens were fabricated and tested under pinned with warping-restrained end condition including two different cross-section dimensions of columns with five different geometric lengths. Three material tensile coupon tests were conducted to obtain the material properties of the steel used for fabricating the test specimens. The overall initial geometric imperfections were measured. The plate slenderness, member slenderness, chord slenderness and slenderness of batten plates may affect the compression behaviour of cold-formed steel built-up battened box columns and were accordingly investigated. It was found that the chord slenderness significantly affects the compressive strength of the built-up columns. Test results, including the compression resistances, the load versus displacement responses and the deformed shapes were presented. The test strengths were compared with the design strengths predicted using the North American Specifications (AISI-S100:2016), EuroCode (EN1993-1-3:2006) and design equations proposed by EI Aghoury et al. The design strengths predictions by these two design standards were unconservative, with EI Aghoury et al.’s standard performing better. Finite-element models were developed and verified against the test results.

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“…In the first step, relatively small displacement was applied to gradually develop the contact relationship between the surfaces, with artificial stabilisation by specifying the default damping factor value of 0.0002. In the second step, the full specified displacement was applied to reach the peak system load and trace the post-ultimate response of the built-up columns (Anbarasu and Venkatesan, 2018; Becque and Rasmussen, 2008).…”

Section: Fe Modellingmentioning

confidence: 99%

“…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. Anbarasu and Venkatesan (2018) proposed a new DSM design formulation for CFS built-up I-section columns composed of our U-profiles mainly failed in local buckling. From the literature, it is found that the studies so far reported does not include the end fastener group (EFG) as per AISI-S100 (2016) specifications on CFS members on CFS built-up members.…”

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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Behaviour of cold-formed steel built-up I-section columns composed of four U-profiles

Cited by 18 publications

References 30 publications

Study on Strength and Behaviour of Cold-Formed Steel Built-up Columns

Study on Strength and Behaviour of Cold-Formed Steel Built-up Columns

Behaviour of cold-formed steel built-up battened columns composed of four lipped angles: Tests and numerical validation

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

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