Abstract
The design equations for the ultimate global buckling strength of cold-formed steel (CFS) compression members in different design standards were originally developed for hot-rolled steel (HRS) members which normally do not undergo flexural torsional buckling (FTB). The presence of post-buckling strength for CFS compression members undergoing FTB was reported in the literature which is not accounted for in design equations. There were a few attempts to incorporate the post-FTB strength to the global buckling strength equations available in North American Standard (NAS). One of the recent proposals is to introduce a modification to global buckling strength equations by introducing an additional parameter, β which represents the relative principal second moment of areas (Ix/Iy) of the cross-section. This paper demonstrates the limitations of using parameter β for modifying the global buckling equations to account for post-buckling strength.
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References
ABAQUS [computer software]. ABAQUS analysis User’s manual, Version 6.8, Providence, RI, Dassault Systemes Simulia
Australian/New Zealand Standard (AS/NZS) (2018) Cold-formed steel structures. AS/NZS 4600:2018, Standards Australia, Sydney
Dat DT, Peköz T (1980) The strength of cold-formed steel columns. Center for Cold-Formed Steel Structures Library 110
Dinis PB, Camotim D, Alexandre L, Andre DM (2019) On the direct strength method design of columns against global failures. Thin-Walled Struct 139:242–270
Gunalan S, Mahendran M (2013) Improved design rules for fixed ended cold-formed steel columns subject to flexural–torsional buckling. Thin-Walled Struct 73:1–17
NAS (2016) North American Specification (NAS) for the design of cold-formed steel structural members (AISI-S100-16), Washington DC
Popovic D, Hancock GJ, Rasmussen KJR (1999) Axial compression tests of cold-formed angles. J Struct Eng 125(5):515–523
Rasmussen KJR, Hancock GJ (1993) The flexural behaviour of fixed-ended channel section columns. Thin-Walled Struct 17:45–63
Schafer BW, Pekoz T (1998) Computational modeling of cold-formed steel: characterizing geometric imperfections and residual stresses. J Constr Steel Res 47:193–210
Weng CC, Peköz T (1988) Compression tests of cold-formed steel columns. Int Special Conf Cold-Formed Steel Struct
Young B, Ellobody E (2005) Buckling analysis of cold-formed steel lipped angle columns. J Struct Eng 131(10):1570–1579
Young B (2005) Experimental investigation of cold-formed steel lipped angle concentrically loaded compression members. J Struct Eng 131(9):1390–1396
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Aayillia, K.J., Anil Kumar, M.V. (2024). Post-flexural Torsional Buckling Strength in Slender CFS Compression Members. In: Madhavan, M., Davidson, J.S., Shanmugam, N.E. (eds) Proceedings of the Indian Structural Steel Conference 2020 (Vol. 1). ISSC 2020. Lecture Notes in Civil Engineering, vol 318. Springer, Singapore. https://doi.org/10.1007/978-981-19-9390-9_25
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DOI: https://doi.org/10.1007/978-981-19-9390-9_25
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