Influence of Active Confinement on Behavior and Strength of Reinforcing Steel Anchorages
Publication: Journal of Performance of Constructed Facilities
Volume 29, Issue 6
Abstract
The strength and behavior of large-diameter reinforcing steel bars with straight anchorages were experimentally investigated. The anchorage details are typical of monolithic girder-column connections used in bridges and buildings in the midcentury. Eleven subassemblage column specimens were examined with different anchorage lengths, bar groupings, amount of transverse steel, and externally applied column axial forces. Test results showed an increase in anchorage capacity because of the presence of transverse steel and externally applied axial force. Experimental results were compared with contemporary design specifications which do not currently account for the beneficial effects of column axial compression acting transverse to the splitting plane. A modification factor was developed to account for the presence of active force applied transverse to the splitting plane to determine anchorage capacity that better estimated the available capacity of the anchorages.
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Acknowledgments
This research was funded by the Oregon Department of Transportation and the Federal Highway Administration. The authors would like to thank Mr. Steven M. Soltesz of the Oregon Department of Transportation Research Unit for his assistance in coordinating this research effort. The opinions, findings, and conclusions are those of the authors and may not represent those acknowledged.
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Published In
Journal of Performance of Constructed Facilities
Volume 29 • Issue 6 • December 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 18, 2014
Accepted: Aug 7, 2014
Published online: Oct 7, 2014
Discussion open until: Mar 7, 2015
Published in print: Dec 1, 2015
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