Effect of FRP Wrapping on Fatigue Bond Behavior of Spliced Concrete Beams
Publication: Journal of Composites for Construction
Volume 20, Issue 1
Abstract
This paper presents the first phase of an ongoing research program at University of Waterloo to study the effect of external fiber-reinforced polymer (FRP) sheet wrap confinement along a lap splice of reinforced concrete (RC) beams on their fatigue bond strength. Fatigue loading of RC beams containing a lap splice resulted in an increase in the number and width of cracks, an increase in deflection, and a decrease of the bond strength between the steel rebar and the surrounding concrete. The phase of the research described here consists of monotonic and fatigue tests of sixteen reinforced concrete beam with dimensions . Each beam was reinforced with two 20 M bars lap spliced in the constant moment region of the tension zone and two 10 M bars in the compression zone outside the constant moment region. The test variables were the presence or absence of an FRP wrapping, the type of the FRP wrapping glass or carbon fiber-reinforced polymer (GFRP or CFRP), the type of loading, and the fatigue load range. The test results for monotonic loading showed that the stiffness of all beams was almost the same, but that the FRP sheet wrapping increased the bond strength and the deflection at ultimate load. All beams tested under fatigue loading failed by a bond failure except one CFRP-wrapped beam that failed by fatigue of the main reinforcement. The FRP sheet increased the bond strength for all specimens under fatigue loading.
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Acknowledgments
Financial support from the Saudi Arabian Cultural Bureau in Canada and Salman bin Abdul Aziz University in Saudi Arabia are gratefully acknowledged. The donations of concrete from Hogg Ready Mix and FRP materials from SIKA Canada are appreciated. Also, the authors thank the technical staff of the Structure’s laboratory at the University of Waterloo.
References
ACI (American Concrete Institute). (1992). “Considerations for design of concrete structures subjected to fatigue loading.”, Detroit.
ACI (American Concrete Institute). (2003). “Bond and development of straight reinforcing bars in tension.”, Detroit.
ACI (American Concrete Institute). (2008). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.”, Detroit.
ACI (American Concrete Institute). (2012). “Report on bond of steel reinforcing bars under cyclic loads.”, Detroit.
Bournas, D., and Triantafillou, T. (2011). “Bond strength of lap-spliced bars in concrete confined with composite jackets.” J. Compos. Constr., 156–167.
Bousias, S., Spathis, A. L., and Fardis, M. N. (2007). “Seismic retrofitting of columns with lap spliced smooth bars through FRP or concrete jackets.” J. Earthquake Eng., 11(5), 653–674.
Fagundo, F., Gergely, P., and White, R. (1979). “The behavior of lapped spliced in reinforced concrete beam subject to repeated loads.”, Dept. of Structural Engineering, Cornell University, Ithaca, NY.
Garcia, R., Helal, Y., Pilakoutas, K., and Guadagnini, M. (2013). “Bond strength of short lap splices in RC beams confined with steel stirrups or external CFRP.” Mater. Struct., 48(1-2), 277–293.
Hamad, B., Rteil, A., and Soudki, K. (2004). “Bond strength of tension lap splices in high-strength concrete beams strengthened with glass fiber reinforced polymer wraps.” J. Compos. Constr., 14–21.
Helgason, T., and Hanson, J. M. (1974). “Investigation of design factors affecting fatigue strength of reinforcing steel—Statistical analysis.” SP-41: Abeles Symp., Fatigue of Concrete, American Concrete Institute, Detroit, 107–138.
Hungspreug, S. (1981). “Local bond between a reinforcing bar and concrete under high intensity cyclic load.” Ph.D. thesis, Cornell Univ.
Orangun, C. O., Jirsa, J. O., and Breen, J. E. (1977). “A reevaulation of test data on development length and splices.” ACI J. Proc., 74(3), 114–122.
Plizzari, G., Lundgren, K., and Balazs, G. (2002). “Bond and splitting in fibre reinforced concrete under repeated loading.” Proc.: Bond in Concrete-From Research to Standards, Budapest, Hungary, 221–229.
Rezansoff, T., Zacaruk, J. A., and Afseth, J. G. (1993). “High cycle (fatigue) resistance of reinforced concrete beams with lap splices.” Can. J. Civ. Eng., 20(4), 642–649.
Rezansoff, T., Zacaruk, J. A., and Topping, R. (1988). “Tensile lap splices in reinforced concrete beams under inelastic cyclic loading.” ACI Struct. J., 85(1), 46–52.
Rteil, A. (2007). “Fatigue bond behavior of corroded reinforcement and CFRP confined concrete.” Ph.D. thesis, Dept. of Civil and Environmental Engineering, Univ. of Waterloo, Waterloo, ON, Canada.
Soretz, S. (1974). “Contribution to the fatigue strength of reinforced concrete.” SP-41: Abeles Symp., Fatigue of Concrete, American Concrete Institute, Detroit, 35–58.
Soudki, K., and Sherwood, T. (2003). “Bond behavior of corroded steel reinforcement in concrete wrapped with carbon fiber reinforced polymer sheets.” J. Mater. Civ. Eng., 358–370.
Tepfers, R. (1973). “A theory of bond applied to overlapped tensile reinforcement splices for deformed bars.” Ph.D. thesis, Division of Concrete Structures, Chalmers Univ. of Technology, Göteborg, Sweden.
Zacaruk, J. A. (1990). “Performance of large size reinforced concrete beams containing a lap splice subjected to fatigue loads.” M.Sc. thesis, Dept. of Civil Engineering, Univ. of Saskatchewan, Saskatchewan, SK, Canada.
Information & Authors
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Published In
Journal of Composites for Construction
Volume 20 • Issue 1 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Oct 23, 2014
Accepted: Apr 10, 2015
Published online: Jun 18, 2015
Discussion open until: Nov 18, 2015
Published in print: Feb 1, 2016
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