Confinement of Columns and Wall Boundary Elements Using Headed Bars
Publication: Journal of Structural Engineering
Volume 140, Issue 3
Abstract
Two series of full-scale specimens were constructed and tested under pure axial load to investigate the effectiveness of confinement provided by headed bars. One series consisted of columns and the other series represented boundary elements in shear walls. Each series consisted of five specimens that included a specimen without any confinement, a specimen with closed ties, a specimen with seismic hoops and crossties, a specimen with closed hoops and headed bars replacing the crossties, and a specimen that had all of the transverse reinforcement replaced by headed bars. It was concluded that headed bars provided a viable solution when used to replace crossties, offering similar confinement. In these monotonically loaded tests, it was also found that headed bars could be used to replace entirely the hoops and the crossties, offering similar confinement effects.
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Acknowledgments
The donation of materials by Headed Reinforcement Corporation (HRC) in Fountain Valley, CA, is greatly appreciated. Kjell L. Dahl and Christian Dahl of HRC provided practical guidance on the use of headed bars. David Mar and Leo Panian of Tipping Mar and Associates provided valuable discussions and examples of applications of headed reinforcement. The financial support of the Natural Sciences and Engineering Research Council of Canada (NSERC) is gratefully acknowledged.
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Information
Published In
Journal of Structural Engineering
Volume 140 • Issue 3 • March 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Aug 20, 2012
Accepted: Apr 8, 2013
Published online: Apr 10, 2013
Published in print: Mar 1, 2014
Discussion open until: Apr 20, 2014
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