Behaviour of stiffened cold-formed steel built-up sections with complex edge stiffeners under bending

Arun²

2016

Arab J Sci Eng

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Usually, thin-walled open column sections have an intrinsic weakness in their low torsional strength, which is unpleasant for resistance of an open section. The distortion behaviour of cold-formed steel open section has a significant role in structural steel design. Hence, initiativeness is made for converting partially closed section by adding simple spacer plates connected with self-tapping screws. The intend of this work is tested to estimate the competence of this solution by comparing the strength and performance of partially closed and open stiffened complex channel section under axial compression. The buckling characteristics of the section are computed using the linear elastic buckling analysis program CUFSM. The resistance and behaviour of the intermediate columns are examined in detail using finite element analysis software ANSYS. A good conformity between finite element analysis and experiments is found. The nominal design capacities are evaluated using the necessities of the direct strength method, North American iron and steel specification and Indian standard and are compared with those from test and finite element analysis. After this verification of the numerical model, a crucial parametric study is carried out to inspect the effect of vitiations on thickness, depth, spacing and slenderness of spacer plates. The particulars of this study and results are offered in this research article.

Section: Introductionmentioning

confidence: 99%

Behaviour of Partially Closed Stiffened Cold-Formed Steel Compression Member

Arun²

2016

Arab J Sci Eng

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“…In the linear analysis, the sections are considered to have a perfect geometry to determine the probable buckling behaviour. In the non-linear analysis, both geometric and material non-linearities are incorporated (Manikandan et al 2014;Manikandan and Sukumar 2015, Kankanamge and Mahendran 2012. The numerical models are discredited using shell element (S4R) with a mesh size of 10 mm × 10 mm (Manikandan and Sukumar 2015).…”

Section: Finite Element Modellingmentioning

confidence: 99%

“…Haidarali and Nethercot (2012a, b) have investigated the true buckling behaviour of beam with both edge and intermediate stiffeners in their compression flanges on the postbuckling of laterally restrained CFS Z-section beam. Manikandan et al (2014Manikandan et al ( , 2015Manikandan et al ( , 2016 have investigated the behaviour of thin-walled built-up I beams in pure bending. Experimental and numerical studies on the flexural behaviour of CFS builtup section were performed by Alex and Iyappan (2016), Yang et al (2017) and Hassan et al (2017).…”

Section: Introductionmentioning

confidence: 99%

Investigation on cold-formed steel lipped channel built-up I beam with intermediate web stiffener

Thulasi²

2019

Int J Adv Struct Eng

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The aim of the present study is to examine the behaviour of cold-formed steel (CFS) lipped channel built-up I-section with edge and intermediate web stiffeners under bending. Initially, the section dimension of length, width of the flange and depth of the sections are optimized numerically and finally, it is validated with the test results. All the select cross-section dimensions have satisfied the pre-qualified beam dimensions. Numerical analysis is carried out using the software ABAQUS. Totally, four section geometries are tested experimentally. After validation, a total of 75 parametric studies are carried out using the verified finite element model. All the results are compared with the direct strength method specifications for CFS structures and the suitable design modifications are detailed.

“…All the beams are analysed under simply supported end condition with two-point loading. To minimize the lateral movement at the support, the lateral constraint is provided (Manikandan and Sukumar 2015). A typical FEM is shown in Fig.…”

Section: Details Of the Finite Element Modelmentioning

confidence: 99%

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

Ezhilan²

2019

Int J Adv Struct Eng

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The objective of this study is to make the experimental and finite element simulations of buckling behaviour of cold-formed steel (CFS) built-up hat-shaped closed section under simply supported end condition subjected to two-point loading. Numerical simulation is carried out using the software ABAQUS. The test result is compared with numerical results and good correlation is achieved. Next, for validation, a series of parametric studies are carried out using the validated numerical model, such as the effect of length, depth, width, thickness and angle of the inclined element. The local buckling and the interaction of local and flexural buckling are studied. To end with, a design equation is proposed in accordance with the direct strength method specification for CFS structure.