Flexural Strength of RC Beams with GFRP Laminates
Publication: Journal of Composites for Construction
Volume 11, Issue 5
Abstract
The results of an experimental and numerical study of the flexural behavior of reinforced concrete beams strengthened with glass-fiber-reinforced-polymer (GFRP) laminates are presented in this paper. In the experimental program, ten strengthened beams and two unstrengthened beams are tested to failure under monotonic loading. A number of external GFRP laminate layers and bond length of GFRP laminates in shear span are taken as the test variables. Longitudinal GFRP strain development and interfacial shear stress distribution from the tests are examined. The experimental results generally showed that both flexural strength and stiffness of reinforced concrete beams could be increased by such a bonding technique. In the numerical study, an eight-node interface element is developed to simulate the interface behavior between the concrete and GFRP laminates. This element is implemented into the MARC software package for the finite-element analyses of GFRP laminate strengthened reinforced concrete beams. Reasonably good correlations between experimental and numerical results are achieved.
Get full access to this article
View all available purchase options and get full access to this article.
References
Buyukozturk, O., Gunes, O., and Karaca, E. (2004). “Progress on understanding debonding problems in reinforced concrete and steel members strengthened using FRP composites.” Constr. Build. Mater., 18(1), 9–19.
Comité Euro-International du Béton (CEB-FIP). (1993). CEB-FIP model code 1990—Design code, Thomas Telford, London, CEB Bulletin d’Information No. 213/214.
Fanning, P., and Kelly, O. (2000). “Smeared crack models of RC beams with externally bonded CFRP plates.” Comput. Mech., 26(4), 325–332.
Horiguchi, T., and Saeke, N. (1997). “Effect of test methods and quality of concrete on bond strength of CFRP sheet.” Proc., 3rd Int. Symp., Nonmetallic (FRP) Reinforcement for Concrete Structures, Vol. 1, Tokyo, 265–270.
Jeong, Y. J., and Jung, K. H. (2001). “Nonlinear analysis with slip and composite action in composite structure of sandwich system.” 1st Int. Conf. on Steel and Composite Structures, Pusan, Korea, 1505–1514.
Kishi, N., Zhang, G., and Mikami, H. (2005). “Numerical cracking and debonding analysis of RC beams reinforced with FRP sheet.” J. Compos. Constr., 9(6), 507–514.
Kotsovos, M. D., and Pavlovic, M. N. (1995). Structural concrete: Finite-element analysis for limit-state design, Thomas Telford Services Ltd., London.
Leung, C. K. Y. (2001). “Delamination failure in concrete beams retrofitted with a bonded plate.” J. Mater. Civ. Eng., 13(2), 106–113.
Lu, X. Z., Teng, J. G., Ye, L. P., and Jiang, J. J. (2005a). “Bond-slip models for FRP sheets/plates bonded to concrete.” Eng. Struct., 27(6), 920–937.
Lu, X. Z., Ye, L. P., Teng, J. G., and Jiang, J. J. (2005b). “Mesoscale finite element model for FRP plates/sheets bonded to concrete.” Eng. Struct., 27(4), 564–575.
Malek, A. M., Saadatmanesh, H., and Ehsani, M. R. (1998). “Prediction of failure load of RC beams strengthened with FRP plate due to stress concentration at the plate end.” ACI Struct. J., 95(1), 142–152.
MARC Analysis Research Corporation. (1997). Volume D: User subroutine/special routines, Santa Ana, Calif.
Nakaba, K., Kanakubo, T., Furuta, T., and Yoshizawa, H. (2001). “Bond behaviour between fibre-reinforced polymer laminates and concrete.” ACI Struct. J., 98(3), 359–367.
Oehlers, D. J., and Seracino, R. (2004). Design of FRP and steel plated RC structures: Retrofitting beams and slabs for strength, stiffness, and ductility, Elsevier, Amsterdam, The Netherlands.
Pham, H. B., and Al-Mahaidi, R. (2004). “Assessment of available prediction models for the strength of FRP retrofitted RC beams.” Compos. Struct., 66(1–4), 601–610.
Reedy, E. D., Mello, F. J., and Guess, T. R. (1997). “Modeling the initiation and growth of delaminations in composite structures.” J. Compos. Mater., 31(8), 812–831.
Saadatmanesh, H., and Malek, A. M. (1998). “Design guidelines for flexural strengthening of RC beams with FRP plates.” J. Compos. Constr., 2(4), 158–164.
Saffi, M., and Sayyah, T. (2001). “Health monitoring of concrete structures strengthened with advanced composite materials using piezoelectric transducers.” Composites, Part B, 32(4), 333–342.
Schellekens, J. C. J., and de Borst, R. (1994). “Free edge delamination in carbon-epoxy laminates: A novel numerical/experimental approach.” Compos. Struct., 28(4), 357–373.
Shahawy, M. A., Arockiasamy, M., Beitelman, T., and Sowrirajan, R. (1996). “Reinforced concrete rectangular beams strengthened with CFRP laminates.” Composites, Part B, 27B, 225–233.
Smith, S. T., and Teng, J. G. (2001). “FRP-strengthened RC beams. I: Review of debonding strength models.” Eng. Struct., 24(4), 385–395.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2002). FRP-strengthened RC structures, Wiley, Hoboken, N.J.
TYFO S-Fibrwrap Composite System. (1997). Technical data for TYFO SEH-51 composite system using TYFO-S epoxy, FYFE Co., LLC, San Diego.
Yao, J., Teng, J. G., and Lam, L. (2005). “Experimental study on intermediate crack debonding in FRP-strengthened RC flexural members.” Adv. Struct. Eng., 8(4), 365–395.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 5 • October 2007
Pages: 497 - 506
Copyright
© 2007 ASCE.
History
Received: Oct 24, 2005
Accepted: Apr 9, 2007
Published online: Oct 1, 2007
Published in print: Oct 2007
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.