Experimental and Parametric Investigation of Response of NSM CFRP-Strengthened RC Beams
Publication: Journal of Composites for Construction
Volume 18, Issue 1
Abstract
The present investigation deals with carbon-fiber-reinforced polymer (CFRP) rebar manufacturing, experimental flexural and shear response of near-surface-mounted (NSM) CFRP-strengthened reinforced concrete (RC) beams, and detailed parametric study of NSM-strengthened RC beams using Abaqus. The CFRP bars were manufactured locally using the twisting technique. Parametric study was performed by considering various key parameters which affect the strengthening of the RC beams such as a CFRP bar’s orientation, geometry, intergroove separation, type of groove, cross-section area of bars, and material strength. The parametric study is based on the nonlinear finite-element modeling using Abaqus for examining the flexural and shear behavior. All beams were tested under a two-point loading system. The numerical results obtained using Abaqus are validated with the experimental results. The present study results show a significant increase in the strength of RC beams strengthened with NSM CFRP bars. Furthermore, based on this study, guidelines for realistic structural applications and optimization of the use of NSM CFRP bars are proposed.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This paper is a part of a research project funded by University Grant Commission (UGC) of India, New Delhi, sanctioned to the first author under the scheme of Major Research Projects [F. No. 34-389/2008 (SR)] and Aditya Birla group (ABG project).
References
American Concrete Institute (ACI). (2008a). “Building code requirements for structural concrete and commentary.”, Farmington Hills, MI.
American Concrete Institute (ACI). (2008b). “Guide for the design and construction of structural concrete reinforced with FRP bars.”, Farmington Hills, MI.
ASTM. (2008) “Standard test method for tensile properties of pultruded glass-fibre-reinforced plastic rod.” ASTM D3916-08, West Conshohocken, PA.
Bureau of Indian Standards. (2000). “Plain and reinforced concrete—Code of practice.” IS 456-2000, New Delhi, India.
Ceroni, F., Pecce, M., Bilotta, A., and Nigro, E. (2012). “Bond behavior of FRP NSM systems in concrete elements.” Compos. Part B, 43(2), 99–109.
Dassault Systèmes Simulia Corporation. (2010). Abaqus analysis user’s manual 6.10, ABAQUS Inc., Providence, RI.
De Lorenzis, L., Rizzo, A., and Tegola, A. L. (2002). “A modified pull-out test for bond of near-surface mounted FRP rods in concrete.” Compos. Part B, 33(8), 589–603.
De Lorenzis, L., and Teng, J. G. (2007). “Near-surface mounted FRP reinforcement: An emerging technique for strengthening structures.” Compos. Part B, 38(2), 119–143.
Desayi, P., and Krishnan, S. (1964). “Equation for the stress-strain curve of concrete.” J. Am. Concr. Inst., 61(3), 345–350.
El-Attar, A. G., White, R. N., and Gergely, P. (1997). “Behaviour of gravity load designed reinforced concrete buildings subjected to earthquakes.” ACI Struct. J., 94(2), 133–145.
El-Hacha, R., and Rizkalla, S. H. (2004). “Near-surface-mounted fiber-reinforced polymer reinforcements for flexural strengthening of concrete structures.” ACI Struct. J., 101(5), 717–726.
Ferracuti, B., Savoia, M., and Mazzotti, C. (2006). “A numerical model for FRP-concrete delamination.” Compos. Part B, 37(4–5), 356–364.
Gere, J., and Timoshenko, S. (1997). Mechanics of materials, PWS Publishing, Boston.
Rasheed, H. A., Harrison, R. R., Peterman, R. J., and Alkhrdaji, T. (2010). “Ductile strengthening using externally bonded and near surface mounted composite systems.” Compos. Struct, 92(10), 2379–2390.
Rasheed, H. A., Nayal, R., and Melhem, H. (2004). “Response prediction of concrete beams reinforced with FRP bars.” Compos. Struct., 65(2), 193–204.
Remmel, G. (1994). Tensile and shear behavior of high strength concrete members (in German), Deutscher Ausschuss für Stahlbeton, BeuthVerlag, Berlin.
Singh, S. B., Madappa, V., Reddy, A., Khatri, C. K., Nagarjuna, A., and Hima, K. (2012). “Performance of NSM-FRP RC beams in flexure and shear using locally developed CFRP rebars.” Int. J. Sustainable Mater. Struct. Syst., 1(1), 42–67.
Weidong, W., Juan, C., and Zhao, L. (2010). “Analysis of the bond performance of strengthened with NSM CFRP rods in concrete based on Ansys.” Int. Symp. on Multi-field Coupling Theory of Rock and Soil Media and its Applications, Oriental Academic Forum, Australia.
Information & Authors
Information
Published In
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 26, 2012
Accepted: Jun 28, 2013
Published online: Jul 2, 2013
Published in print: Feb 1, 2014
Discussion open until: Mar 2, 2014
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.