Classification and Identification of Buckling Modes of Steel Columns under Cyclic Loading
Publication: Journal of Structural Engineering
Volume 149, Issue 8
Abstract
Wide-flange columns are commonly used for the construction of special moment frames and braced frames. For special moment frames, design engineers routinely use deep sections to meet the stringent code-specified story drift limits in order to achieve economy in recent years. Columns with shallow and stocky sections are common for braced frame construction. Observation made from two recent experimental studies involving both deep and shallow columns under axial compression and cyclic drifts showed a variety of buckling modes. A classification with three cyclic buckling modes is proposed in this paper; subsets of each buckling mode are also presented. A parameter measuring the relative rotational restraint that the web provides to each flange is derived. After calibrating this parameter with the test results, a practical procedure that can predict the governing cyclic buckling mode is proposed.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. This includes the test data.
Acknowledgments
Funding for this research was provided by the Applied Technology Council (ATC) under its Earthquake and Structural Engineering Research contract with the National Institute of Standards and Technology (NIST). A. Hortacsu and S. Schiff at ATC served as the Project Manager. J. Harris at NIST provided technical advice. J. O. Malley at Degenkolb Engineers chaired the Project Advisory Committee. The authors would like to acknowledge the American Institute of Steel Construction (AISC) for donating steel materials and The Herrick Corporation for donating fabrication of the test specimens. The W14 column test program was sponsored by AISC.
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Published In
Journal of Structural Engineering
Volume 149 • Issue 8 • August 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 12, 2022
Accepted: Mar 15, 2023
Published online: May 19, 2023
Published in print: Aug 1, 2023
Discussion open until: Oct 19, 2023
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