Direct Strength Method and Response of Cold-Formed Steel Storage Rack Uprights in Global Biaxial Bending

Nima Talebian*, Benoit P. Gilbert, Dane Miller, Hassan Karampour, Mohammad Hosein Habashizadeh

*Corresponding author for this work

Research output: Contribution to conferencePaperResearchpeer-review

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This study seeks to investigate the global (lateral-torsional) buckling capacity of cold-formed steel (CFS) storage rack uprights under biaxial bending. A previously validated biaxial bending numerical model for local and distortional buckling of CFS rack uprights is used for global buckling. Biaxial bending response of nine unperforated upright cross-sections, each with nine different biaxial bending configurations, were considered. The findings demonstrate that the biaxial bending of the investigated uprights is governed by a nonlinear interaction behavior. DSM predictions including the classical method and the use of inelastic reserve capacity are compared to numerical capacities. The use of the DSM with inelastic reserve capacity as in the AISI-S100 and AS/NZS 4600, results in an overall 3% improvement of the predictions when compared with the classical DSM. A new extended range of the inelastic reserve capacity for global buckling is proposed. When compared with the classical DSM approach, the new extended range results in 14% improvement of the DSM predictions.
Original languageEnglish
Number of pages12
Publication statusPublished - 2023
EventICTWS 2023 Thin-Walled Structures - Ninth International Conference - The University of Sydney, Sydney, Australia
Duration: 29 Nov 20231 Dec 2023


ConferenceICTWS 2023 Thin-Walled Structures - Ninth International Conference
Abbreviated titleICTWS2023
OtherThin-walled structures constitute a broad field covering civil, mechanical and aeronautical branches of engineering, numerous materials (e.g., steel, aluminium, fibre-reinforced plastics, functionally graded materials, nanomaterials), and diverse industries and applications (e.g., construction, automotive, aircraft, marine, space). The emergence of novel structural materials and connection technologies, together with the ongoing progress in computational tools and design specifications, demands the continuous advancement of innovative thin-walled structures in a wide range of areas.

The Thin-Walled Structures international conference series was initiated in 1996 in Glasgow under the auspices of the Journal of the same name and its Founding Editor, Prof. Jim Rhodes. Thin-Walled Structures has remained active in fostering the continuation of the conference series in the last nearly three decades. Since the initial conference in Glasgow, conferences have been held in Singapore (1998), Krakow (2001), Loughborough (2004), Brisbane (2008), Timisoara (2011), Busan (2014) and Lisbon (2018).

ICTWS2023 will be an in person (only) conference, to be held in Sydney from 29 November to 1 December 2023, will be ninth in this prestigious series of conferences.
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