Application of Timoshenko Beam-Column Theory in Data Correction for Steel Beam-Column Testing
Publication: Journal of Structural Engineering
Volume 146, Issue 3
Abstract
A recent cyclic test program evaluated the performance of steel wide-flange columns under axial loads and lateral drifts; the specimens had either fixed-fixed or fixed-rotating boundary conditions. For both cases, the flexibility of fully restrained moment connections at specimen ends, which varied in degrees based on several factors such as configurations of the bolted connection, end-plate thickness, and magnitude of the applied axial load, was observed to have significant impacts on elastic flexural stiffnesses of the measured responses. Therefore, the measured responses needed to be corrected, accounting for the effects of connection flexibility, before test parameters of interest can be investigated. A data-correction procedure that eliminates the effect of connection flexibility from the measured beam-column responses is developed. The procedure is built upon theoretical knowledge of elastic Timoshenko beam-column behavior. Once the effect of connection flexibility is removed, the corrected test responses become equivalent to the responses of beam-columns with ideal rigid end connections.
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Acknowledgments
Funding for this research was provided by the NEHRP Consultants Joint Venture Earthquake, Structural, and Engineering Research for the National Institute of Standards and Technology (NIST). American Institute of Steel Construction and Herrick Corporation donated the test specimens. Mr. J. O. Malley from Degenkolb Engineers chaired the Project Technical Committee, and Ms. A. Hortacsu from Applied Technology Council served as the project manager. The authors would like to acknowledge Dr. J. L. Harris III from NIST for reviewing this paper.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 3 • March 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Nov 16, 2018
Accepted: Jul 18, 2019
Published online: Dec 31, 2019
Published in print: Mar 1, 2020
Discussion open until: May 31, 2020
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