Axial compression behavior of laced cold-formed steel built-up columns with unstiffened angle sections

Dar, M. Adil; Sahoo, Dipti Ranjan; Jain, Arvind K.

doi:10.1016/j.jcsr.2019.105727

Cited by 40 publications

(10 citation statements)

References 23 publications

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“…The overall slenderness of the laced columns influenced their failure modes. These results were further confirmed by Dar et al (2019a) when double-lacing configuration was adopted. Anbarasu (2020) conducted tests on CFS battened columns with stiffened angles and did not experience early local buckling in the chords as experienced by Dar et al (2018a, 2019a).…”

Section: Introductionsupporting

confidence: 55%

“…These results were further confirmed by Dar et al (2019a) when double-lacing configuration was adopted. Anbarasu (2020) conducted tests on CFS battened columns with stiffened angles and did not experience early local buckling in the chords as experienced by Dar et al (2018a, 2019a). Further, the intermediate batten spacing controlled the buckling strength of these columns (Anbarasu and Dar, 2020a).…”

Section: Introductionsupporting

confidence: 55%

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Development of an efficient steel truss system using CFS sections: a comparative study with a hot-rolled steel truss

Dar

Subramanian

Baniya

et al. 2020

IJSI

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PurposeThe purpose of this paper is to discuss the performance of efficient cold-formed steel (CFS) sections in building a truss system. A comparative study was performed comparing trusses built with cold-formed and hot-rolled sections.Design/methodology/approachMedium-scale specimens were fabricated and tested under monotonic loading. Closed CFS sections (tubular sections) were adopted as compression members of the truss, against the open sections (angle sections) in the hot-rolled steel truss. While as open sections (angle sections) were adopted as tension members in both these cases, the performance assessment was made on the basis of the peak loads carried by the trusses, the vertical deflections and the failure modes exhibited.FindingsThe results of this study indicated that the overall strength, strength-to-weight ratio and overall convenience in terms of cost and fabrication, in the CFS truss was better than that of the hot-rolled one. Also, the judicious utilization of steel which has limited reserves can be achieved.Originality/valueCold-formed and hot-rolled sections are widely used in the steel structures. There are advantages and disadvantages in using each of these configurations, discussed in this work. The advantages are widely known by the scientific community; however, few studies are developed with the purpose of quantifying the gains of each solution. Thus, this work emerges with great innovation, with regard to the experimental evaluation of the trusses' behavior composed of different structural sections.

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Section: Introductionsupporting

confidence: 55%

Section: Introductionsupporting

confidence: 55%

Development of an efficient steel truss system using CFS sections: a comparative study with a hot-rolled steel truss

Dar

Subramanian

Baniya

et al. 2020

IJSI

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“…Although, most of these studies mainly adopted channels as chords. Different types of lateral connecting elements were adopted, which include plates over the full column height (Meza et al, 2020;Anbarasu and Venkatesan, 2019;Ghannam, 2017), web-spacers (Anbarasu and Dar, 2020b;Anbarasu and Vijayanad, 2017;Roy et al, 2018) at intermediate locations, lacing bars (Dar et al, 2018(Dar et al, , 2019(Dar et al, , 2021a and batten plates (Anbarasu and Dar, 2020a;Anbarasu, 2020;EI Aghoury et al, 2013;Dar et al, 2021b;2020;Rahnavarad et al, 2021;Muthuraman et al, 2020;Vijayanand and Anbarasu, 2020;Kherbouche and Megnounif, 2019;Anbarasu et al, 2015;Dabaon et al, 2015a;. These studies include both experimental and numerical investigations.…”

Section: Introductionmentioning

confidence: 99%

Cold-formed steel battened built-up columns: Experimental behaviour and verification of different design rules developed

Dar

Vijayanand²,

Anbarasu³

et al. 2021

Advances in Structural Engineering

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Some of the past studies on cold-formed steel (CFS) battened built-up columns have resulted in the development of new design rules for predicting their axial strengths. However, the main drawbacks of such studies are that they are purely numerical and the numerical models developed for such parametric studies were validated using the test results on similar built-up column configurations, but not the exact ones. Therefore, experimental studies on CFS battened columns comprising of lipped channels are needed for verifying the accuracy of the proposed design rules for CFS battened columns. This paper reports an experimental study performed on CFS built-up battened columns under axial compression. Adequately spaced identical lipped channels in the back-to-back arrangement were used as chords and were connected by batten plates laterally with self-driving screws to form the built-up members. The dimensions of chords were fixed as per the geometric limits given out in the North American Specifications (NAS) for the design of CFS structural members. The sectional compactness of the chords and the overall slenderness of the built-up columns were varied by altering the thickness of the channels and height of the built-up columns, respectively. A total of 20 built-up sections were tested under uniform compression to investigate the behavioural changes in the built-up columns due to these variations. The behaviour assessment was made in terms of peak strengths, load–displacement response and failure modes of the test specimens. The current design standards on CFS structures were used to determine the design strengths and were compared against the test strengths for assessing their adequacy. Furthermore, as discussed in the beginning, the test strengths were used to verify the accuracy of the different relevant proposed design rules in the literature.

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“…Four angle sections were connected by battens [19][20][21] and lacings [12,22,23] to form a closed section and investigations were carried out. Pin-ended laced columns with bolt connectivity were tested under monotonic axial loading experimentally.…”

Section: Assembling Four Angle Sectionsmentioning

confidence: 99%

“…A parametric study was further carried out using ABAQUS software. Limitations on parameter varied were suggested and also as the effect of slenderness ratio of lacing was not included in codes, NAS and EC3 were not appropriate [22,23]. Similarly, Anbarasu and Dar [12] investigated battened four lipped angle sections by varying the parameters like angle section's sectional compactness, global column slenderness and batten's spacing by ABAQUS.…”

Section: Assembling Four Angle 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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Axial compression behavior of laced cold-formed steel built-up columns with unstiffened angle sections

Cited by 40 publications

References 23 publications

Development of an efficient steel truss system using CFS sections: a comparative study with a hot-rolled steel truss

Development of an efficient steel truss system using CFS sections: a comparative study with a hot-rolled steel truss

Cold-formed steel battened built-up columns: Experimental behaviour and verification of different design rules developed

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

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