Bond Strength of Tension Lap Splices in High-Strength Concrete Beams Strengthened with Glass Fiber Reinforced Polymer Wraps
Publication: Journal of Composites for Construction
Volume 8, Issue 1
Abstract
This paper presents the experimental results of the first phase of a study undertaken at the American University of Beirut to examine the effectiveness of fiber reinforced polymer (FRP) wraps to confine steel reinforcement in a tension lap splice region anchored in high-strength reinforced-concrete beams. Seven beam specimens were constructed. The specimens were reinforced on the tension side with three deformed bars spliced at midspan. The splice region was devoid of any transverse reinforcement to allow a full examination of the FRP wrap contribution. Glass fiber reinforced polymer (GFRP) sheets were used. The main test variables were the GFRP configuration in the splice region (one strip, two strips, or a continuous strip), and the number of layers of the GFRP wraps placed around the splice region (one layer or two layers). All GFRP wraps were U-shaped. Except for the epoxy adhesive, no other anchorage mechanism or bonding procedure was applied for the GFRP wraps on the concrete beam. Following the application of the GFRP wraps, the beams were tested in positive bending. The test results demonstrated that GFRP wraps were effective in enhancing the bond strength and ductility of failure mode of the tension lap splices, especially when continuous strips were applied over the splice region.
Get full access to this article
View all available purchase options and get full access to this article.
References
American Concrete Institute (ACI). (1996). “State-of-the-art report on fiber reinforced plastic reinforcement for concrete.” ACI 440R-96, Detroit.
American Concrete Institute (ACI). (2002). “Building code requirements for reinforced concrete and commentary.” ACI 318-02/ACI 318R-02, Detroit.
Azizinamini, A., Darwin, D., Eligehausen, R., Pavel, R., and Ghosh, S. K.(1999a). “Proposed modifications to ACI 318-95: Tension development and lap splice for high strength concrete.” ACI Struct. J., 96(6), 922–926.
Azizinamini, A., Pavel, R., Hatfield, E., and Ghosh, S. K.(1999b). “Behavior of lap-spliced reinforcing bars embedded in high strength concrete.” ACI Struct. J., 96(5), 826–835.
Azizinamini, A., Stark, M., Roller, J. J., and Ghosh, S. K.(1993). “Bond performance of reinforcing bars embedded in high strength concrete.” ACI Struct. J., 90(5), 554–561.
Craig, B., and Soudki, K. A. (2002). “Confining effects of CFRP on corroded concrete members.” Proc., 2nd Int. Conf. on Durability of Fiber Reinforced Polymer Composites for Construction, CDCC 2002, in press.
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.
Orangun, O. C., Jirsa, J. O., and Breen, J. E. (1977). “The strength of anchored bars: A reevaluation of test data on development length and splices.” ACI Struct. J., March, 114–122.
Sharaf, H. A., and Soudki, K. A. (2002). “Strength assessment of reinforced concrete beams with debonded reinforcement and confinement with CFRP wraps.” Proc., CSCE 30th Annual Conf., Canadian Society for Civil Engineering, Montréal, in press.
Soudki, K. A. (1997). “Rehabilitation of structures by fibre reinforced plastic laminates.” Trends in structural mechanics, Proc., ANS Symp., Univ. of Waterloo, Waterloo Ont., Canada, 125–134.
Soudki, K. A., and Sherwood, T.(2003). “Bond behavior of corroded steel reinforcement in concrete wrapped with carbon fiber reinforced polymer sheets.” J. Mater. Civ. Eng., 15(4), 358–370.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 8 • Issue 1 • February 2004
Pages: 14 - 21
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Apr 8, 2002
Accepted: Sep 20, 2002
Published online: Jan 16, 2004
Published in print: Feb 2004
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.