Tensile Behavior of FRP Anchors in Concrete
Publication: Journal of Composites for Construction
Volume 13, Issue 2
Abstract
Strengthening of concrete structures using fiber-reinforced polymer (FRP) systems has become a widely accepted technology in the construction industry over the past decade. Externally bonded FRP sheets are proven to be a feasible alternative to traditional methods for strengthening and stiffening deficient reinforced or prestressed concrete members. However, the delamination of FRP sheets from the concrete surface poses major concerns, as it usually leads to a brittle member failure. This paper reports on the development of FRP anchors to overcome delamination problems encountered in surface bonded FRP sheets. An experimental investigation was conducted on the performance of carbon FRP anchors that were embedded in normal- and high-strength concrete test specimens. A total of 81 anchors were tested under monotonic uniaxial loading. Test parameters included the length, diameter, and angle of inclination of the anchors and the compressive strength of the concrete. The experimental results indicate that FRP anchors can be designed to achieve high pullout capacities and hence can be used effectively to prevent or delay the delamination of externally bonded FRP sheets. The results also indicate that the diameter, length, and the angle of inclination of the anchors have a significant influence on the pullout capacity of FRP anchors.
Get full access to this article
View all available purchase options and get full access to this article.
References
Achillides, Z., and Pilakoutas, K. (2004). “Bond behavior of fiber reinforced polymer bars under direct pullout conditions.” J. Compos. Constr., 8(2), 173–181.
American Concrete Institute (ACI). (1997). Code requirements for nuclear safety related structures (ACI 349–85) (Revised 1990) (Reapproved 1997), ACI Committee 394, Farmington Hills, Mich.
Benmokrane, B., Tighiouart, B., and Chaallal, O. (1996). “Bond strength and load distribution of composite FRP rebars in concrete.” ACI Mater. J., 93(3), 246–253.
Chaallal, O., and Benmokrane, B. (1993). “Pullout and bond of glass-fibre rods embedded in concrete and cement grout.” Mater. Struct., 26, 135–145.
Cook, R. A., Collins, D. M., Klingner, R. E., and Polyzois, D. (1992). “Load deflection behavior of cast-in-place anchors and retrofit anchors.” ACI Struct. J., 89(6), 639–649.
Cook, R. A., Doerr, G. T., and Klinger, R. E. (1993). “Bond stress model for design of adhesive anchors.” ACI Struct. J., 90(5), 514–524.
Cook, R. A., and Konz, R. C. (2001). “Factors influencing bond strength of adhesive anchors.” ACI Struct. J., 98(1), 76–86.
Cook, R. A., Kunz, J., Fuchs, W., and Konz, R. (1998). “Behavior and design of single adhesive anchors under tensile load in uncracked concrete.” ACI Struct. J., 95(1), 9–26.
Cosenza, E., Manfredi, G., and Realfonzo, R. (1997). “Behavior and modeling of bond of FRP rebars to concrete.” J. Compos. Constr., 1(2), 40–51.
Eligehausen, R., Cook, R. A., and Appl, J. (2006). “Behavior and design of adhesive bonded anchors.” ACI Struct. J., 103(6), 822–831.
Eligehausen, R., Lallee, R., and Rehm, G. (1984). “Befestigungen mit verbundankern (fastening with bonded anchors).” Betonwerk Fertigteil-Tech., 12, 825–829 (in German and English).
Elighehausen, R., Popov, E. P., and Betero, V. (1983). “Local bond stress-slip relationships of deformed bar under generalized excitations.” Rep. No. UCB/EERC-83/23, Earthquake Engineering, Research Center, Berkeley, Calif.
Fuchs, W., Eligehausen, R., and Breen, J. B. (1995). “Concrete capacity design (CCD) approach for fastening to concrete.” ACI Struct. J., 92(1), 73–94.
Gesoglu, M., Ozturan, T., Ozel, M., and Guneyisi, E. (2005). “Tensile behavior of post-installed anchors in plain and steel fiber-reinforced normal- and high-strength concretes.” ACI Struct. J., 102(2), 224–231.
International Federation for Concrete. (2000). “Bond of reinforcement in concrete.” Rep., former CEB Task Group 2.5, Ch.7/TG 4.2/WP 7, FIB Bulletin 10, Lausanne, Switzerland, 315–394.
Luke, P. C. C., Chon, C., and Jirsa, J. O. (1985). “Use of epoxies for grouting reinforcing bar dowels in concrete.” PMFSEL Rep. No. 85–2, Phil M. Ferguson Structural Engineering Laboratory, Dept. of Civil Engineering, The Univ. of Texas, Austin, Tex.
Makitani, E., Irisawa, I., and Nishiura, N. (1993). “Investigation of bond in concrete member with fiber reinforced plastic bars.” Proc., 1st Int. Symp. on FRP Reinforcement for Concrete Structures (FRPRCS-1), ACI SP-138, American Concrete Institute, Farmington Hills, Mich., 315–332.
McVay, M., and Cook, R. A. (1996). “Pullout simulation of postinstalled chemically bonded anchors.” J. Struct. Eng., 122(9), 1016–1024.
Nanni, A., Al-Zaharani, M. M., Al-Dulaijan, S. U., Bakis, C. E., and Boothby, T. E. (1995). “Bond of FRP reinforcement to concrete—Experimental results.” Proc., 2nd Int. Symp. on FRP Reinforcement for Concrete Structures (FRPRCS-2), 135–145.
Saatcioglu, M., Serrato, F., and Foo, S. (2005). “Seismic performance of masonry infill walls retrofitted with cfrp sheets.” ACI— SP230: 7th Int. Symp. on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures, 341–354.
Zhang, B., and Benmokrane, B. (2002). “Pullout bond properties of fiber-reinforced polymer tendons to grout.” J. Mater. Civ. Eng., 14(5), 246–251.
Information & Authors
Information
Published In
Copyright
© 2009 ASCE.
History
Received: Jun 11, 2007
Accepted: Sep 24, 2007
Published online: Apr 1, 2009
Published in print: Apr 2009
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.