Cold-Formed High-Strength Steel Rectangular and Square Hollow Sections under Combined Compression and Bending
Publication: Journal of Structural Engineering
Volume 145, Issue 12
Abstract
High-strength steel is gaining more attention from engineers due to its high strength-to-weight ratio and cost effectiveness. However, the research on cold-formed high-strength steel (CFHSS) tubular members subjected to combined compression and bending is limited. This paper, therefore, presents an experimental investigation on this combined loading scenario, in particular at the cross-section level. The test specimens consisted of five square hollow section sizes and two rectangular hollow section sizes. The nominal proof stresses of the test specimens were between 700 and 900 MPa. A total of 51 short beam-columns were tested to investigate the behavior of CFHSS rectangular and square hollow sections subjected to combined compression and bending. A set of different initial loading eccentricities were adopted to attain a wide range of bending-to-compression ratios. The compression and bending capacities, load-deformation histories, and failure modes of the test specimens were reported. Based on the test results, the design methods described in American, Australian, and European codes were evaluated. Finite-element modeling methodology for CFHSS tubular beam-columns is also presented.
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Acknowledgments
The authors would like to thank the technicians and the final year undergraduate student Mr. Ho-Chun Chui from the Department of Civil Engineering at The University of Hong Kong for their assistance in helping the experimental works. The authors are also grateful to Rautaruukki for supplying the cold-formed high strength tubular test specimens. The research work described in the article was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. 17212115). The authors are also grateful for the support from the Chinese National Engineering Research Centre for Steel Construction (Hong Kong Branch) at The Hong Kong Polytechnic University.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 145 • Issue 12 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: May 7, 2018
Accepted: Apr 17, 2019
Published online: Sep 28, 2019
Published in print: Dec 1, 2019
Discussion open until: Feb 28, 2020
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