Effect of Flange Width-Thickness Ratio on Eccentrically Braced Frames Link Cyclic Rotation Capacity
Publication: Journal of Structural Engineering
Volume 131, Issue 10
Abstract
An analytical study was conducted to investigate the influence of the flange width–thickness ratio on the rotation capacity of links in eccentrically braced frames. Finite element models, verified using experimental data, were used to investigate the performance of 112 links. Models simulated strength degradation associated with flange and web local buckling that may occur during cyclic loading. The models provided data for short, intermediate, and long links with a range of flange width–thickness ratios. Results indicate that a relaxation of the flange width–thickness ratio requirement in current AISC seismic design provisions is justified. It was also found, however, that the provisions specify nonconservative design rotations for some intermediate links. This is shown to be related to web stiffener spacing and not the flange width–thickness ratio.
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Acknowledgments
Funding for this research was provided by the American Institute of Steel Construction; Mr. Tom Schlafly was the project manager. Professor Michael Engelhardt provided results from recent link testing performed at the University of Texas at Austin. Dr. Subhash Goel, Mr. James Malley, and Dr. Tom Sabol provided guidance and professional perspective on the project.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 10 • October 2005
Pages: 1546 - 1552
Copyright
© 2005 ASCE.
History
Received: Jan 8, 2004
Accepted: Nov 12, 2004
Published online: Oct 1, 2005
Published in print: Oct 2005
Notes
Note. Associate Editor: Brian Uy
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