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I.S. Chakka, M.V.A. Kumar, "Evaluation of Direct Strength Method for Local Buckling Strength of Cold Formed Steel Stiffened Lipped Channels", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 14.3, 2022, doi:10.4203/ccc.3.14.3

Keywords: cold formed steel, direct strength method, lipped channel, intermediate stiffeners, local buckling, finite element analysis.

Abstract

Intermediate stiffeners in the web and flanges are used in cold-formed steel (CFS) lipped channels to avoid local buckling. Many researchers demonstrated that the direct strength method (DSM) is not accurate for estimating the strength of stiffened channel compression members. The inadequacy of DSM for stiffened channels may be because either the strength due to independent buckling modes (local, distortional or global) or interaction of buckling modes are not adequately determined. In this study, the DSM-local buckling strength equation is evaluated using the results from FEA for the web height to flange width ratio (h/b) of 1 and 2. It is observed that the normalized local buckling strength (Pul/Py) is a function of the h/b ratio of the cross-section in addition to the non-dimensional slenderness ratio and the strength obtained from DSM is conservative.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 3 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: B.H.V. Topping and J. Kruis Paper 14.3 Evaluation of Direct Strength Method for Local Buckling Strength of Cold Formed Steel Stiffened Lipped Channels I.S. Chakka and M.V.A. Kumar Indian Institute of Technology Palakkad, Kerala, India doi:10.4203/ccc.3.14.3 Full Bibliographic Reference for this paper I.S. Chakka, M.V.A. Kumar, "Evaluation of Direct Strength Method for Local Buckling Strength of Cold Formed Steel Stiffened Lipped Channels", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 14.3, 2022, doi:10.4203/ccc.3.14.3 Keywords: cold formed steel, direct strength method, lipped channel, intermediate stiffeners, local buckling, finite element analysis. Abstract Intermediate stiffeners in the web and flanges are used in cold-formed steel (CFS) lipped channels to avoid local buckling. Many researchers demonstrated that the direct strength method (DSM) is not accurate for estimating the strength of stiffened channel compression members. The inadequacy of DSM for stiffened channels may be because either the strength due to independent buckling modes (local, distortional or global) or interaction of buckling modes are not adequately determined. In this study, the DSM-local buckling strength equation is evaluated using the results from FEA for the web height to flange width ratio (h/b) of 1 and 2. It is observed that the normalized local buckling strength (Pul/Py) is a function of the h/b ratio of the cross-section in addition to the non-dimensional slenderness ratio and the strength obtained from DSM is conservative. download the full-text of this paper (PDF, 6 pages, 425 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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