Experimental Study on the Bond Behavior of Reinforcing Bars Embedded in Concrete Subjected to Lateral Pressure
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 1
Abstract
Owing to its importance in the design and assessment of steel-reinforced concrete structures, the bond behavior of reinforcing bars embedded in concrete has been widely investigated. In this paper, 91 specimens were cast and tested to study the effect of lateral pressure on the bond behavior of plain and deformed round bars. On the basis of the experimental results, it is found that, for plain round bars, the bond capacity increases significantly with an increase in lateral pressure, whereas the slip corresponding to the peak bond stress reduces dramatically once the lateral pressure is applied. Through using the deformed reinforcing bars with noncentrosymmetric surface configuration, it is found that the bond behavior is closely related to the direction and magnitude of the lateral pressure. When the lateral pressure is applied parallel to the transverse rib, the bond capacity increases with an increase in lateral pressure. When the lateral pressure is perpendicular to the transverse rib, the bond capacity basically remains constant. Finally, a theoretical explanation of the experimental phenomena is given.
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Acknowledgments
The financial support from the National Natural Science Foundation with Grant No. NNSFC51078057, the Open Research Fund Program of State Key Laboratory of Hydroscience and Engineering with Grant No. UNSPECIFIEDsklhse-2008-D-03, and the National Basic Research Program (973 Program) with Grant No. UNSPECIFIED2009CB623200, of the People’s Republic of China, is greatly acknowledged.
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Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 1 • January 2012
Pages: 125 - 133
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Feb 23, 2011
Accepted: Jul 11, 2011
Published online: Jul 13, 2011
Published in print: Jan 1, 2012
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