Effect of Transverse Steel on the Response of RC Beams Strengthened in Shear by FRP: Experimental Study
Publication: Journal of Composites for Construction
Volume 13, Issue 5
Abstract
The present paper shows and discusses some of the results obtained within an experimental investigation carried out on 15 reinforced concrete (RC) beams strengthened in shear by externally bonded fiber-reinforced plastics (FRP) sheets. The aim of the study is to analyze the influence that the geometrical percentage of transverse steel reinforcement could have on the FRP resisting action. In particular, the objectives of the experimental campaign are to explore the possible interaction between FRP and steel transverse reinforcement resisting actions, analyzing the deformation behavior of the shear resisting system (FRP, transverse steel, and concrete) and the modes of failure of the strengthened and not strengthened beams. The results of the tests in terms of shear capacity are compared to the design formulations provided by the American Concrete Institute and the National Research Council of Italy code-format recommendations.
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Acknowledgments
The tests were conducted at the GEOLAB SUD s.r.l [San Vittore (FR), Italy] which is gratefully acknowledged for its technical and financial support. The writers thank the Sika Italia for supplying GFRP sheets. This research is part of a project that has received financial support from the Ministry of the Italian University and Research and by Italian Research Program RELUIS.
References
American Concrete Institute (ACI). (2002). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI Struct. J., 440, 2R–02.
Bousselham, A., and Chaallal, O. (2006). “Effect of transverse steel and shear span on the performance of RC beams strengthened in shear with CFRP.” J. Compos.-Part B: Eng., 37, 37–46.
Canadian Standards Association (CSA). (2002). “Design and construction of building components with fiber-reinforced polymer.” CSA S806–02, Ont., Canada.
Chaallal, O., Shahawy, M., and Hassam, M. (1998). “Strengthening of reinforced concrete beams with externally bonded fiber-reinforced-plastic plates: Design guidelines for shear and flexure.” Can. J. Civ. Eng., 25, 692–704.
Chajes, M. J., Janusaka, T. F., Mertz, D. R., Thompson, T. A., and Finch, W. W. (1995). “Shear strengthening of reinforced concrete beams using externally applied composite fabrics.” ACI Struct. J., 92(3), 295–303.
Chen, J. F., Chen, G. M., and Teng, J. G. (2006). “Shear resistance of FRP-strengthened RC beams: Interaction between internal steel stirrups and external FRP strips.” Proc., Development in Composites: Advanced, Infrastructural, Natural and Nanocomposites (ACUN-5), UNSV, Sydney, Australia, 143–150.
Chen, J. F., and Teng, J. G. (2003a). “Shear capacity of FRP strengthened RC beams: FRP rupture.” J. Struct. Eng., 129(5), 615–625.
Chen, J. F., and Teng, J. G. (2003b). “Shear capacity of FRP strengthened RC beams: FRP debonding.” Construct. Build. Mater., 17(1), 27–41.
Denton, S. R., Shave, J. D., and Porter, A. D. (2004). “Shear strengthening of reinforced concrete structures using FRP composites.” Proc., Int. Conf. on Advanced Polymer Composites for Structural Applications in Construction, Woodhead Publishing Limited, Abington Hall, Abington, Cambridge, U.K., 134–143.
Ente Italiano di Unificazione (UNI). (2003). “Prove distruttive sui calcestruzzi. Prova di compressione.” UNI EN 12390–3, Italy (in Italian).
Ente Italiano di Unificazione (UNI). (2004). “Materiali metallici. Prova di trazione. Metodo di prova (temperatura ambiente).” UNI EN 10002–1, Italy (in Italian).
Gendron, G., Picard, A., and Guerin, M. C. (1999). “A theoretical study on shear strengthening of reinforced concrete beams using composite plates.” Compos. Struct., 45, 303–309.
Grande, E., Imbimbo, M., and Rasulo, A. (2007). “Experimental behavior of RC beams strengthened in shear by FRP sheets.” Proc., Conf. on FRP Composites in Civil Engineering (FRPRCS—8) (CD-ROM), Patrasso, Greece.
Guadagnini, M., Pilakoutas, K., and Waldron, P. (2006). “Shear resistance of FRP RC beams: Experimental study.” J. Compos. Constr., 10(6), 464–473.
Ianniruberto, U., and Imbimbo, M. (2004). “The role of FRP sheets in the response of RC beams: Experimental and analytical results GFRP shear strengthening of RC beams.” J. Compos. Constr., 8(5), 415–424.
International Federation for Structural Concrete (FIB). (2001). “Externally bonded fiber polymer reinforcement (FRP EBR) for reinforced concrete structures.” FIB-TG9.3, Lausanne, Switzerland.
Khalifa, A., Gold, W., Nanni, A., and Abel–Aziz, M. (1998). “Contribution of externally shear capacity of RC flexural members.” J. Compos. Constr., 2(4), 195–202.
Khalifa, A., and Nanni, A. (2000). “Improving shear capacity of existing RC T-section beams using CFRP composites.” Cem. Concr. Compos., 22(3), 135–146.
Khalifa, A., and Nanni, A. (2002). “Rehabilitation of rectangular simply supported RC beams with shear deficiencies using CFRP composites.” Constr. Build. Mater., 16, 135–146.
Li, A., Assih, J., and Delmas, Y. (2001). “Shear strengthening of RC beams with externally bonded CFRP sheets.” J. Struct. Eng., 127(4), 374–380.
Malek, A. M., and Saadatmanesh, H. (1998). “Analytical study of reinforced concrete beams strengthened with web-bonded fibre reinforced plates or fabrics.” ACI Struct. J., 95(3), 343–351.
Mohamed Ali, M. S., Oehlers, D. J., and Seracino, R. (2006). “Vertical shear interaction model between external FRP transversal plates and internal steel stirrups.” Eng. Struct., 28(3), 381–389.
Monti, G., Santinelli, F., and Liotta, M. A. (2004). “Shear strengthening of beams with composite materials.” Proc., 2nd Int. Conf. on FRP Composites in Civil Engineering (CICE), 2005 Taylor & Francis Group,Adelaide, Australia.
National Research Council of Italy (CNR). (2006). “Guide for the design and construction of externally bonded FRP systems for strengthening existing structures. Materials, RC and PC structures, and masonry structures.” CNR-DT200, Rome.
Norris, T., Saadatmanesh, H., and Ehsani, M. R. (1997). “Shear and flexural strengthening of RC beams with carbon fiber sheets.” J. Struct. Eng., 123, 903–911.
Pellegrino, C., and Modena, C. (2002). “FRP shear resisting of RC beams with transverse steel reinforcement.” J. Compos. Constr., 6(2), 104–111.
Pellegrino, C., and Modena, C. (2006). “Fiber reinforced polymer shear strengthening of reinforced concrete beams: Experimental study and analytical modeling.” ACI Struct. J., 103(5), 720–728.
Qu, Z., Lu, X. Z., and Ye, L. P. (2005). “Size effect of shear contribution of externally bonded FRP U-Jackets for RC beams.” Proc., Int. Symp. on Bond Behavior of FRP in Structures, J. F. Chen and J. G. Teng, eds., 2005 International Institute for FRP Construction, Hong Kong, China, 371–379.
Rasulo, A., and Imbimbo, M. (2006). “The influence of transverse steel and FRP configurations on the shear behavior of RC beams.” Proc., Conf. FIB 06, doppiavoce, Naples, Italy.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2002). FRP strength-ened RC structures, Wiley, New York.
Teng, J. G., Lam, L., and Chen, J. F. (2004). “Shear strengthening of RC beams with FRP composites.” Prog. Struct. Eng. Mater., 6, 173–184.
Triantafillou, T. C. (1998). “Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites.” ACI Struct. J., 95(2), 107–115.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 13 • Issue 5 • October 2009
Pages: 405 - 414
Copyright
© 2009 ASCE.
History
Received: Feb 8, 2007
Accepted: Mar 11, 2009
Published online: Sep 15, 2009
Published in print: Oct 2009
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