Effects of Transverse Bar Spacing on Bond of Spliced Reinforcing Bars in Fully Grouted Concrete Block Masonry
Publication: Journal of Structural Engineering
Volume 141, Issue 2
Abstract
Twenty-seven wall-splice specimens reinforced with number (No.) 15 (0.6 in.) deformed bars were tested to evaluate the effect of transverse bar spacing on the tensile resistance of the lap-spliced reinforcement. All specimens were blocks wide and 13 courses tall and were constructed in running bond with all cells fully grouted. In all cases, the lapped bars were located within a single block cell and were either spaced 0, 25, or 50 mm (0, 1, or 2 in.) apart. It was determined that the calculated tensile resistance of the reinforcement was greater for bars that were in contact and furthermore, is insensitive to the magnitude of the transverse spacing provided in the case of noncontact lap splices. It would appear that both the American and Canadian provisions are appropriate for both contact and noncontact lapped bars given the resulting levels of conservatism.
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Acknowledgments
The authors would like to thank Brennan Pokoyoway and Dale Pavier, Structures Laboratory technicians, and journeyman masons Kim Parenteau and Roy Nicolas from Gracom, for their assistance with the execution of the experimental program. Financial support was provided by the Saskatchewan Masonry Design Centre, the Saskatchewan Centre for Masonry Design, the Natural Sciences and Engineering Research Council of Canada, and the University of Saskatchewan.
References
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Published In
Journal of Structural Engineering
Volume 141 • Issue 2 • February 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Sep 3, 2013
Accepted: Jan 22, 2014
Published online: Jul 1, 2014
Discussion open until: Dec 1, 2014
Published in print: Feb 1, 2015
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