Experimental Behavior of Carbon Fiber-Reinforced Polymer (CFRP) Sheets Attached to Concrete Surfaces Using CFRP Anchors
Publication: Journal of Composites for Construction
Volume 14, Issue 2
Abstract
Fiber-reinforced polymer (FRP) composite sheets have gained popularity as a viable strengthening technique for existing reinforced concrete structures. The efficiency of the strengthening system largely depends on adequate bond between FRP sheets and the concrete substrate. In recent years, techniques to anchor FRP sheets have been proposed in applications that have limited distance to develop FRP sheet strength. One promising technique consists of fabricating and bonding FRP anchors during the FRP sheet saturation and embedding them into predrilled holes in the concrete substrate. This paper presents experimental results highlighting the complex behavior between FRP sheets and anchors. The primary failure modes that the sheet-anchor system can experience are identified. The experiments identify the main variables that influence the FRP anchor-sheet system behavior. This research contributes to the needed experimental database that will aid in future development of design recommendations of this anchorage system.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
Graduate studies for the first author were supported through a Brack Structural Engineering Graduate Student Fellowship at the University of Massachusetts Amherst. The writers express their most sincere gratitude to Mr. Robert Brack for establishing the graduate fellowship. The second writer acknowledges the support provided be the UMass Commonwealth College through an undergraduate research fellowship. In kind material donations received for specimen fabrication from Barker Steel and BASF are deeply appreciated.
References
Bizindavyi, L., and Neale, K. W. (1999). “Transfer lengths and bond strengths for composites bonded to concrete.” J. Compos. Constr., 3(4), 153–160.
Breña, S. F., Bramblett, R. M., Wood, S. L., and Kreger, M. E. (2003). “Increasing the flexural capacity of RC beams using CFRP composites.” ACI Struct. J., 100(1), 36–46.
Chajes, M. J., Finch, W. W., Jr., Januszka, T. F., and Thomson, T. A., Jr. (1996). “Bond and force transfer of composite material plates bonded to concrete.” ACI Struct. J., 93(2), 295–303.
Coronado, C. A., and López, M. M. (2008). “Experimental characterization of concrete-epoxy interfaces.” J. Mater. Civ. Eng., 20(4), 303–312.
Elsayed, W. E., Ebead, U. A., and Neale, K. W. (2009). “Studies on mechanically fastened fiber-reinforced polymer strengthening systems.” ACI Struct. J., 106(1), 49–59.
Eshwar, N., Nanni, A., and Ibell, T. J. (2008). “Performance of two anchor systems of externally bonded fiber-reinforced polymer laminates.” ACI Mater. J., 105(1), 72–80.
Khalifa, A., Alkhrdaji, T., Nanni, A., and Lansburg, S. (1999). “Anchorage of surface mounted FRP reinforcement.” Concr. Int., 21(10), 49–54.
Kotynia, R., Baky, H. A., Neale, K. N., and Ebead, U. A. (2008). “Flexural strengthening of RC beams with externally bonded CFRP systems: Test results and 3D nonlinear FE analysis.” J. Compos. Constr., 12(2), 190–201.
Nakaba, K., Kanakubo, T., Furuta, T., and Yoshizawa, H. (2001). “Bond behavior between fiber-reinforced polymer laminates and concrete.” ACI Struct. J., 98(3), 359–367.
Orton, S. L., Jirsa, J. O., and Bayrak, O. (2008). “Design considerations of carbon fiber anchors.” J. Compos. Constr., 12(6), 608–616.
Ozbakkaloglu, T., and Saatcioglu, M. (2009). “Tensile behavior of FRP anchors in concrete.” J. Compos. Constr., 13(2), 82–92.
Pellegrino, C., Tinazzi, D., and Modena, C. (2008). “Experimental study on bond behavior between concrete and FRP reinforcement.” J. Compos. Constr., 12(2), 180–189.
Smith, S. T., and Teng, J. C. (2002a). “FRP-strengthened RC Beams-I: Review of debonding strength models.” Eng. Struct., 24(4), 385–395.
Smith, S. T., and Teng, J. C. (2002b). “FRP-strengthened RC Beams-II: Assessment of debonding strength models.” Eng. Struct., 24(4), 397–417.
Yao, J., Teng, J. G., and Chen, J. F. (2005). “Experimental study on FRP-to-concrete bonded joints.” Composites, Part B, 36, 99–113.
Yuan, H., Teng, J. G., Seracino, R., Wu, Z. S., and Yao, J. (2004). “Full-range behavior of FRP-to-concrete bonded joints.” Eng. Struct., 26, 553–565.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 14 • Issue 2 • April 2010
Pages: 185 - 194
Copyright
© 2010 ASCE.
History
Received: Apr 13, 2009
Accepted: Aug 26, 2009
Published online: Mar 15, 2010
Published in print: Apr 2010
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.