Cold-Formed Lean Duplex Stainless Steel Tubular Members under Concentrated Interior Bearing Loads
Publication: Journal of Structural Engineering
Volume 145, Issue 7
Abstract
In this study, a total of 58 tests were performed on cold-formed lean duplex stainless steel (LDSS) tubular members under three different loading conditions of concentrated interior bearing forces. The loading conditions included interior-one-flange (IOF), interior-two-flange (ITF), and interior loading (IL). The loading conditions of IOF and ITF are specified in the US and Australian/New Zealand cold-formed stainless steel design specifications, and the loading condition of IL simulated the floor joist members positioned on a solid foundation subjected to concentrated bearing load. The cold-formed LDSS specimens were failed by web crippling. The test strengths were compared with the nominal strengths predicted by the international specifications for stainless steel structures. In addition, the strengths predicted by the North American specification for cold-formed carbon steel structures and those from the design equations proposed in the literature for cold-formed duplex stainless steel members were also compared with the test strengths. It was found that the nominal strengths predicted by the international specifications for stainless steel structures are conservative and reliable for cold-formed LDSS members under concentrated interior bearing loads. The predictions by the North American specification were generally unconservative and not reliable, whereas the predictions from the literature were generally less conservative and reliable compared with those predicted by the stainless steel design specifications.
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Acknowledgments
The authors are grateful to STALA Tube Finland for providing the test specimens. The research work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. HKU17209614E). The authors are also grateful to Miss Ning Yan Chan for her assistance in the experimental program as part of her final year undergraduate research project at the University of Hong Kong.
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Published In
Journal of Structural Engineering
Volume 145 • Issue 7 • July 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Aug 10, 2018
Accepted: Nov 20, 2018
Published online: Apr 29, 2019
Published in print: Jul 1, 2019
Discussion open until: Sep 29, 2019
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