Parametric Study of FRP Plate Debonding Using Global Energy Balance
Publication: Journal of Composites for Construction
Volume 18, Issue 6
Abstract
Fiber-reinforced polymer (FRP) plate debonding is commonly caused by the fracturing of concrete, but few studies of fracture debonding models exist, from which the failure load of the concrete cover layer can be evaluated. This paper presents a parametric study for plate end debonding using the global energy balance approach (GEBA), which has been proposed recently for determining the structure-debonding load. GEBA determines the debonding load using moment-curvature () models, and can thus be used to determine how debonding is affected by the beam’s flexural design. This paper presents parametric results using debonding contours on plots of moment capacity against the plate curtailment locations, and shows that beams with the same depth-to-fracture energy ratio give virtually the same debonding contour. This helps to generalize debonding determination for beams with different depths, and can be conveniently used for design. The parametric study lays a foundation for the application of fracture mechanics in FRP-plate retrofitting design using conventional models to cover a wide range of flexural retrofitting situations.
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References
Achintha, P. M. M., and Burgoyne, C. J. (2008). “Fracture mechanics of plate debonding.” J. Compos. Constr., 396–404.
Achintha, P. M. M., and Burgoyne, C. J. (2009). “Moment-curvature and strain energy of beams with external fiber-reinforced polymer reinforcement.” ACI Struct. J., 106(1), 20–29.
Achintha, P. M. M., and Burgoyne, C. J. (2011). “Fracture mechanics of plate debonding: Validation against experiment.” Constr. Build. Mater., 25(6), 2961–2971.
Aprile, A., Spacone, E., and Limkatanyu, S. (2001). “Role of bond in RC beams strengthened with steel and FRP plates.” J. Struct. Eng., 1445–1452.
Arduini, M., Di-Tommaso, A., and Nanni, A. (1997). “Brittle failure in FRP plate and sheet bonded beams.” ACI Struct. J., 94(4), 363–370.
Bazant, Z. P., and Becq-Giraudon, E. (2002). “Statistical prediction of fracture parameters of concrete and implications for choice of testing standard.” Cem. Concr. Res., 32(4), 529–556.
Burgoyne, C. J., Achintha, M., and Guan, G. X. (2012). “Prediction of FRP debonding using the global-energy-balance approach.” ACI SP-286, A Fracture Approach for FRP-Concrete Structures, M. Lopez and C. Carloni, eds., American Concrete Institute, Detroit, MI.
Buyukozturk, O., Gunes, O., and Karaca, E. (2004). “Progress on understanding debonding problems in reinforced concrete and steel members strengthened with FRP composites.” Constr. Build. Mater., 18(1), 1–19.
Davalos, J. F., Kodkani, S. S., and Ray, I. (2006). “Fracture mechanics method for model-I fracture evaluation of FRP bonded to concrete substrates.” J. Mater. Civ. Eng., 732–742.
Guan, G. X., and Burgoyne, C. J. (2014a). “Comparison of moment-curvature models for FRP plate end debonding studies using GEBA.” ACI Struct. J., 111(1), 27–36.
Guan, G. X., and Burgoyne, C. J. (2014b). “Unified design method for flexure and debonding in FRP retrofitted RC beams.” J. Compos. Constr., in press.
Hamoush, S. A., and Ahmad, S. H. (1990). “Debonding of steel plate-strengthened concrete beams.” J. Struct. Eng., 356–371.
Park, R., and Paulay, T. (1975). Reinforced concrete structures, Wiley, Toronto.
Smith, S. T., and Teng, J. G. (2002). “FRP-strengthened RC beams. I: Review of debonding strength models.” Eng. Struct., 24(4), 385–395.
Taljsten, B. (1996). “Strengthening of concrete prisms using the plate bonding technique.” Int. J. Fract., 82(3), 253–266.
Wu, Y., Zhou, Z., Yang, Q., and Chen, W. (2010). “On shear bond strength of FRP-concrete structures.” Eng. Struct., 32(3), 897–905.
Yang, Z. J., Chen, J. F., and Proverbs, D. (2003). “Finite element modelling of concrete cover separation failure in FEP plated RC beams.” Constr. Build. Mater., 17(1), 3–13.
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© 2014 American Society of Civil Engineers.
History
Received: Sep 1, 2013
Accepted: Jan 29, 2014
Published online: Mar 14, 2014
Discussion open until: Aug 14, 2014
Published in print: Dec 1, 2014
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