Statistical Analysis of Flexural-Buckling-Resistance Models for High-Strength Steel Columns
Publication: Journal of Structural Engineering
Volume 146, Issue 2
Abstract
Flexural buckling is one of the main problems steel structures are faced with in ensuring an economic design. In Europe, the buckling resistance is calculated using an imperfection factor based on the section type, fabrication method, and steel grade. The current European design standards contain guidelines for the imperfection factor for sections made of steels with yield strength up to and including 700 MPa. However, the current design codes are based mainly on tests performed on steels with yield strength below 460 MPa. Therefore, the applicability of the methodology was reassessed. This paper reviewed the background documentation of the European flexural-buckling design methodology and discussed the current design practice described in the American National Standard. A total of 72 flexural-buckling experiments performed on cold-formed, hot-finished, and welded sections made of steel with yield strength in the range 690–960 MPa were collected and analyzed. Four models for estimating the resistance of high-strength steel struts subjected to pure compression were statistically evaluated based on the collected data. Finally, a recommendation for the estimation of flexural-buckling resistance of high-strength steel members is presented.
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Data Availability Statement
All data and models used during the study appear in the published article. The code used during the study is available online (Seabold and Perktold 2010).
Acknowledgments
The authors acknowledge the support of the European Commission’s Framework Program “Horizon 2020,” through the Marie Skłodowska-Curie Innovative Training Networks (ITN) “AEOLUS4FUTURE—Efficient harvesting of the wind energy” (H2020-MSCA-ITN-2014: Grant Agreement No. 643167) for this research project.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 2 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Apr 11, 2019
Accepted: Jul 16, 2019
Published online: Dec 14, 2019
Published in print: Feb 1, 2020
Discussion open until: May 14, 2020
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