Effect of Spandrel Beam to Double Tee Connection Characteristic on Flexure-Controlled Precast Diaphragms
Publication: Journal of Structural Engineering
Volume 138, Issue 2
Abstract
Precast spandrel beams are often used on the perimeter of precast buildings to support the precast floor units. These elements are typically not considered part of the lateral force resisting system. However, the presence of the spandrel beams in the floor system may modify the strength, stiffness, and deformation capacity of the precast floor diaphragm. The nature of this response is highly dependent on the characteristics of the details connecting the spandrel to the precast floor system. These details are often welded connections used primarily for erection stability and designed without diaphragm action in mind. With emerging design methodologies for precast diaphragms requiring better-defined performance, the impact of the spandrel beams must be accounted for. Accordingly, analytical research is presented here that examines the effect of spandrel-beam-connecting details on the global characteristics and local demands of a flexure-controlled precast floor diaphragm. Design recommendations are provided.
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Acknowledgments
This research was supported by the National Science Foundation (NSF) under Grant NSFCMS-0324522, the Precast/Prestressed Concrete Institute (PCI), and the Charles Pankow Foundation (CPF). The authors are grateful for this support.
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 138 • Issue 2 • February 2012
Pages: 247 - 257
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Sep 5, 2008
Accepted: Apr 18, 2011
Published online: Apr 20, 2011
Published in print: Feb 1, 2012
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