Energy Dissipation of Compression Members in Concentrically Braced Frames: Review of Experimental Data
Publication: Journal of Structural Engineering
Volume 131, Issue 4
Abstract
Design and detailing requirements of seismic provisions for concentrically braced frames (CBF) were specified based on the premise that bracing members with low and will have superior seismic performance. However, relatively few tests investigate the cyclic behavior of CBF. It is legitimate to question whether the compression member of CBF plays as significant a role as what has been typically assumed explicitly by the design provisions. In this paper, the existing experimental data are reviewed to quantify the extent of hysteretic energy achieved by bracing members in compression in past tests, and the extent of degradation of the compression force upon repeated cycling loading. Although it is recognized that many parameters have an influence on the behavior of braced frames, the focus of this paper is mostly on quantifying energy dissipation in compression and its effectiveness on seismic performance. Based on the experimental data review from previous tests, it is found that the normalized energy dissipation of braces having moderate do not have significantly more normalized energy dissipation in compression than those having a slenderness in excess of 120. The normalized degradation of the compression force envelope depends on and is particularly severe for W-shaped braces.
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Acknowledgments
This work was conducted by the University at Buffalo and was supported by the Federal Highway Administration under contract number DTFH61-98-C-00094 to the Multidisciplinary Center for Earthquake Engineering Research. However, any opinions, findings, conclusions, and recommendations presented in this paper are those of the authors and do not necessarily reflect the views of the sponsors.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 4 • April 2005
Pages: 552 - 559
Copyright
© 2005 ASCE.
History
Received: Mar 17, 2003
Accepted: Oct 11, 2004
Published online: Apr 1, 2005
Published in print: Apr 2005
Notes
Note. Associate Editor: Sashi K. Kunnath
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