Investigation on cold-formed steel built-up new innovative hat-shaped closed section under bending

Manikandan, P.; Ezhilan, A.

doi:10.1007/s40091-019-00250-w

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…Four span lengths (L) were studied, for instance, L = 750 mm was used to determine the effect of opening shapes and opening location, while L = 1000 mm, L = 1500 mm and L = 2000 mm were used to investigate the effect of opening spacing. The FEA (Manikandan & Ezhilan, 2019) is employed for both material and geometry effects (Foraboschi, 2019(Foraboschi, , 2020. To defining the material properties, a bilinear stress-strain curve is used (Kankanamge & Mahendran, 2010).…”

Section: Finite Element Methodsmentioning

confidence: 99%

Perforation Effect on the Bending Behaviour of Cold-Formed Steel Hat-Purlin Section

De’nan¹,

Choong²,

Ling³

et al. 2021

Int J Steel Struct

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Many structural members, for example, cold-formed steel members, hot-rolled steel members, and composite beams were extensively used in steel construction due to economic development in cities building design. This was to allow flexible installation of ductwork, piping and other systems. Substantial research has been performed on Channel and Zee cold-formed steel sections, but the papers on Hat section steel purlins turned out to be few only, especially Hat-purlin with perforations. Hence, numerical study on cold-formed Hat section steel purlin with perforation was carried out to investigate the effect of perforation to bending behaviour of such sections. Finite element method using LUSAS software was chosen to carry out the research study. Five different perforation shapes were selected, which were circle, diamond, C-hexagon, square and elongated circle. Perforation depth was fixed at 0.5D2, where D2 is the inclined web depth of the section. The results showed that perforated section had lower bending moment than that of the section without perforation, with a percentage difference of not more than 4%. Most of the perforated sections had similar bending characteristic despite of the difference in perforation shapes, where the yield moment difference was less than 2%. Critical opening length played a crucial role in affecting the bending behaviour of section. Furthermore, the location of perforation also influenced the bending behaviour of Hat-purlin. Regardless of perforation spacing, the perforated sections with equal number of perforations behaved similar elastic characteristic before yielding. Section with diamond perforation had higher bending moment than other perforated section whereas section with elongated circle perforation had the lowest bending moment. The presence of perforations gives minor effect on the bending behaviour of cold-formed steel Hat-purlin.

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Section: Finite Element Methodsmentioning

confidence: 99%

Perforation Effect on the Bending Behaviour of Cold-Formed Steel Hat-Purlin Section

De’nan¹,

Choong²,

Ling³

et al. 2021

Int J Steel Struct

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“…Several studies on the behavior of the built-up CFS columns as can be seen in works done by [20]- [23]. On the other hand, the flexural behavior of built-up section beams were investigated in some studies such as [24]- [27]. These studies focused mainly on the built-up CFS sections behavior under compressive actions and how the buckling problems can be reduced comparing to single open sections.…”

Section: Built-up Cfs Sectionsmentioning

confidence: 99%

An Overview of Numerical Studies on Flexural Performance of Built-Up Cold-Formed Steel Beam (CFSB) Filled with Concrete

2021

IJETER

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Cold-formed steel (CFS) built-up sections have been recently introduced with other materials such as concrete connected by means of bolting and screws to avoid the problems of the CFS sections buckling. The flexural analysis of CFS-concrete composite beam is more complicated in terms of design and failure mode. Therefore, this paper attempts a short review on the numerical studies of CFS section with and without concrete under the flexural load. In particular, the CFS buckling failure modes were critically reviewed. Furthermore, the important considerations such as material properties definition and interactions during the numerical simulation were discussed. The review presented in this paper highlights considerable potential on how the nonlinearities of the concrete material, CFS-concrete interaction and connection types affect the level of simulation accuracy in predicting the flexural behavior of the composite beam. Moreover, the connections type, the nonlinear simulation methods and strategies and findings for the CFS-concrete flexural behavior were critically reviewed. The directions of the future research were provided through the concluded remarks and recommendations in achieving a higher accuracy of simulation results as well as more effective design philosophy in future to promote the utilization of CFS composite beam in construction industry.

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“…The buckling behavior of cold-formed hat-shaped sections under bending has been experimentally investigated by Manikandan et al [17] and Aktepe et al [18]. However, despite the recent surge in popularity of CFS omega-shaped beams, the buckling behavior of these hat-section types, characterized by additional stiffeners along the section, has not yet been reported in any study, revealing a significant gap in the available scientific knowledge.…”

Section: Introductionmentioning

confidence: 99%

Global Buckling Resistance of Cold-Formed Steel Beams with Omega-Shaped Sections

Peres,

Carvalho,

Emerick

et al. 2024

Applied Sciences

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The absence of analytical expressions in current codes for evaluating the critical moment for lateral–torsional buckling of cold-formed beams with omega-shaped sections presents a fundamental challenge when assessing their resistance to global buckling. In response to this challenge, a comparative study was conducted to explore various approaches for calculating the critical moment. This involved both analytical and numerical analyses, using different methods available in codes and computational tools. The analytical analysis followed the Effective Width Method, employing the expression proposed in ENV 1993-1-1:1992, which is commonly used for evaluating the critical lateral–torsional moment of hot-rolled profiles. Numerical analyses were then performed using the ABAQUS v6.13, GBTUL v2.0, and CUFSM v5.05 software packages. The ABAQUS model, validated with results obtained from an experimental campaign, serves as the reference model. Upon assessing the bending moment resistances according to European, Brazilian, and American standards, consistency was found among these standards. However, it became evident that using the analytical expression proposed for hot-rolled profiles is inadequate for evaluating the critical lateral–torsional moment of CFS omega-shaped profiles. Conversely, the agreement between the ABAQUS, GBTUL, and CUFSM results suggests their utility as reliable tools for estimating the elastic critical lateral–torsional buckling moment.

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Investigation on cold-formed steel built-up new innovative hat-shaped closed section under bending

Cited by 8 publications

References 10 publications

Perforation Effect on the Bending Behaviour of Cold-Formed Steel Hat-Purlin Section

Perforation Effect on the Bending Behaviour of Cold-Formed Steel Hat-Purlin Section

An Overview of Numerical Studies on Flexural Performance of Built-Up Cold-Formed Steel Beam (CFSB) Filled with Concrete

Global Buckling Resistance of Cold-Formed Steel Beams with Omega-Shaped Sections

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