Behavior of Steel Double-Channel Built-Up Chords of Special Truss Moment Frames under Reversed Cyclic Bending
Publication: Journal of Structural Engineering
Volume 132, Issue 9
Abstract
Results from the tests of six cantilever double-channel built-up members under reversed cyclic bending are presented. The main parameters investigated were stitch spacing and lateral bracing requirements in order to sustain large inelastic rotations, such as those induced by severe earthquake events. Experimental results indicate that current lateral bracing requirements specified in the AISC-LRFD provisions are not adequate to prevent lateral–torsional buckling of individual elements, as well as of the entire built-up member. Based on the results from this research, a new equation is proposed for stitch spacing for interconnection of individual channels. In addition, lateral bracing for the overall member is required near the plastic hinge region to ensure total plastic hinge rotation capacities on the order of .
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Acknowledgments
This research project was sponsored by Nabih Youssef & Associates, and Nucor Research and Development. The writers greatly appreciate valuable input from B. Nuttal, Nabih Youssef, and Walter Schultz. The opinions expressed in this paper are solely those of the writers and do not necessarily represent the views of the sponsors.
References
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Information & Authors
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Published In
Journal of Structural Engineering
Volume 132 • Issue 9 • September 2006
Pages: 1343 - 1351
Copyright
© 2006 ASCE.
History
Received: Jul 19, 2004
Accepted: Jan 3, 2006
Published online: Sep 1, 2006
Published in print: Sep 2006
Notes
Note. Associate Editor: Sherif El-Tawil
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