Comparison of Bond Strength of Steel Bars in Normal- and High-Strength Concrete
Publication: Journal of Materials in Civil Engineering
Volume 16, Issue 4
Abstract
A comparative analytical study of the average bond strength at failure of reinforcing bars embedded in unconfined normal-strength concrete (NSC) and high-strength concrete (HSC) is undertaken. The analysis makes use of an experimentally derived local bond stress-slip model and considers the progressive bond deterioration along the development/splice length with the increase in bar force. Results of the average bond strength (or development/splice strength) predicted by the analysis showed excellent agreement with experimental data for both NSC and HSC. The analysis predicted a highly nonuniform bond stress distribution at bond failure along the development/splice length, particularly for HSC. Below a certain limit of the development/splice length (about the average bond strength at failure, normalized to is larger for HSC as compared to NSC. However, as the development length increases beyond this limit, the normalized bond strength of HSC becomes progressively smaller than that of NSC. While normalization of the average bond strength to may underestimate the effect of on the bond strength for short development/splice lengths, it leads to almost identical normalized bond strength results for NSC and HSC within the practical range of development/splice lengths (in excess of
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Information
Published In
Journal of Materials in Civil Engineering
Volume 16 • Issue 4 • August 2004
Pages: 365 - 374
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Feb 24, 2003
Accepted: Jun 23, 2003
Published online: Jul 15, 2004
Published in print: Aug 2004
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