Experimental Seismic Performance of Beam-Column Subassemblies Using Ductile Embeds
Publication: Journal of Structural Engineering
Volume 139, Issue 9
Abstract
When designed according to current special moment frame requirements, conventional RC beam-column joints in frame-braced buildings subject to design level seismic loads suffer severe damage. Construction of these conventional beam-column joints is also costly and labor intensive. In this paper, the full-scale experimental behavior of two alternative frame-braced subassemblies incorporating ductile embeds is summarized. Observations from the experiments indicate that both specimens exhibit stable hysteretic behavior with no strength degradation in excess of 7% drift ratio. At design plastic rotations expected of conventional beam-column joints, no joint spalling and only minor damage along beam members was observed. A design-oriented lumped element model is described, which reasonably captures the local behavior of the specimens.
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Acknowledgments
This work was supported with funding provided by the Charles Pankow Foundation. Additional financial support (material and labor) was provided by Dywidag Systems International USA, Inc. (DSI), Morley Contractors, Baumann Engineering, and Clark-Pacific. Technical input to the program was provided by the Englekirk Center Industry Advisory Board. The aforementioned support is greatly appreciated. The authors thank the technical staff at the University of California, San Diego Charles Lee Powell Laboratory, in particular Dr. Christopher Latham, Mr. Andrew Gunthardt, and Mr. Robert Parks. The authors also thank Dean Frieder Seible, Jacobs School of Engineering, for his enthusiasm and support of this research program. Opinions, findings, and conclusions are those of the authors and do not necessarily reflect those of any of the sponsoring partners.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 9 • September 2013
Pages: 1555 - 1566
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jan 26, 2011
Accepted: Apr 9, 2012
Published online: Apr 12, 2012
Published in print: Sep 1, 2013
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