Comparison of Roles of FRP Sheets, Stirrups, and Steel Fibers in Confining Bond Critical Regions
This article has a reply.
VIEW THE REPLYPublication: Journal of Composites for Construction
Volume 10, Issue 4
Abstract
Based on experimental data of tension lap splices confined with fiber reinforced polymer (FRP) sheets in normal and high strength concrete (HSC) specimens, a new FRP confinement parameter, , was recommended. It accounts for the increase in bond strength due to the presence of FRP sheets. In this paper, a correlation is presented between the confining effects of FRP flexible sheets, transverse reinforcement, and steel fibers to improve the bond capacity and ductility of the mode of failure of tension lap splices. The correlation is based on research programs conducted at the American University of Beirut in recent years using identical specimens except for the confinement method used: FRP sheets, transverse steel stirrups, or steel fibers. Other variables included the amount of confinement provided and concrete strength. Analysis of test results indicated that an equivalent improvement in bond strength of tension lap splices in normal and high strength concrete specimens is provided by an amount of FRP sheets corresponding to a value of 2.5, or an amount of transverse reinforcement corresponding to of . For HSC specimens, an amount of steel fibers corresponding to a volume fraction of 1% would provide an equivalent improvement in bond strength.
Get full access to this article
View all available purchase options and get full access to this article.
References
ACI Committee 318. (2005). “Building code requirements for reinforced concrete and commentary.” ACI 318-05/ACI 318R-05, Farmington Hills, Mich.
Azizinamini, A., Pavel, R., Hatfield, E., and Ghosh, S. (1999). “Behavior of lap-spliced reinforcing bars embedded in high strength concrete.” ACI Struct. J., 96(5), 826–835.
Azizinamini, A., Stark, M., Roller, J., and Ghosh, S. (1993). “Bond performance of reinforcing bars embedded in high strength concrete.” ACI Struct. J., 90(5), 554–561.
Darwin, D., Zuo, J., Tholen, M. L., and Idun, E. K. (1996). “Development length criteria for conventional and high relative area reinforcing bars.” ACI Struct. J., 93(3), 347–359.
Hamad, B. S., Harajli, M. H., and Joumaa, G. K. (2001). “Effect of steel fiber reinforcement on bond strength of tension lap splices in high strength concrete.” ACI Struct. J., 98(5), 638–647.
Hamad, B. S., and Najjar, S. S. (2002). “Evaluation of the role of transverse reinforcement in confining tension lap splices in high strength concrete.” Mater. Struct., 35, 219–228.
Hamad, B. S., Najjar, S. S., and Joumaa, G. K. (2003). “Correlation between roles of transverse reinforcement and steel fibers in confining tension lap splices in high strength concrete.” ACI Struct. J., 100(1), 19–24.
Hamad, B. S., Rteil, A. A., Salwan, B. R., and Soudki, K. A. (2004a). “Behavior of bond-critical regions wrapped with fiber-reinforced polymer sheets in normal and high strength concrete.” J. Compos. Constr., 8(3), 248–257.
Hamad, B. S., Rteil, A. A., and Soudki, K. A. (2004b). “Bond strength of tension lap splices in high-strength concrete beams strengthened with glass fiber reinforced polymer wraps.” J. Compos. Constr., 8(1), 14–21.
Hamad, B. S., Soudki, K. A., Harajli, M. H., and Rteil, A. A. (2004c). “Experimental and analytical evaluation of the bond strength of reinforcement in FRP wrapped HSC beams.” ACI Struct. J., 101(6), 747–754.
Salwan, B. R. (2003). “Behavior of bond critical regions wrapped with FRP sheets in normal strength concrete.” Masters thesis, American Univ. of Beirut, Beirut, Lebanon.
Information & Authors
Information
Published In
Copyright
© 2006 ASCE.
History
Received: Jun 20, 2005
Accepted: Oct 13, 2005
Published online: Aug 1, 2006
Published in print: Aug 2006
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.