Flexural Rehabilitation and Strengthening of Concrete Beams with BFRP Composite
Publication: Journal of Composites for Construction
Volume 22, Issue 4
Abstract
This paper reports on load tests conducted on seven full-scale RC beam specimens. The objective of this study was to determine the feasibility of using an emerging and greener material, basalt fiber–reinforced polymer (BFRP) composite, as a candidate material for flexural strengthening and rehabilitation of RC beams. The test parameters chosen in this study are the flexural reinforcement ratio, corrosion level, number of layers of BFRP composite, and cross-strapping scheme. The study finds that BFRP composite is a suitable material for flexural strengthening and rehabilitation of RC beams because a large gain in the strength can be achieved by using externally bonded BFRP composite, especially if premature debonding-induced failure of a RC beam can be avoided through implementation of a proper cross-strapping scheme. The study also finds that BFRP flexural strengthening and rehabilitation can reduce the ductility of RC beams; however, the reduction is limited to 30%.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The authors express their sincere appreciation for MEDA Engineering and Technical Services for providing technical assistance necessary for this investigation as well as for Sahan Jayasuriya and Amirreza Bastani for conducting the tension tests on the BFRP composite and for Eric Hughes for helping with specimen preparation. Financial assistance in the form of a graduate scholarship for the project was provided by NSERC to Mr. Duic.
References
Al-Saidy, A. H., and K. S. Al-Jabri. 2011. “Effect of damaged concrete cover on the behavior of corroded concrete beams repaired with CFRP sheets.” Compos. Struct. 93 (7): 1775–1786. https://doi.org/10.1016/j.compstruct.2011.01.011.
ASTM. 2014a. Standard test method for tensile properties of polymer matrix composite materials. ASTM D3039–14. West Conshohocken, PA: ASTM.
ASTM. 2014b. Standard test methods and definitions for mechanical testing of steel products. ASTM A370–14. West Conshohocken, PA: ASTM.
ASTM. 2015. Standard test method for compressive strength of cylindrical concrete specimens. ASTM C39–15. West Conshohocken, PA: ASTM.
Attari, N., S. Amziane, and M. Chemrouk. 2012. “Flexural strengthening of concrete beams using CFRP, GFRP and hybrid FRP sheets.” Constr. Build. Mater. 37: 746–757. https://doi.org/10.1016/j.conbuildmat.2012.07.052.
Buyukozturk, O., and B. Hearing. 1998. “Failure behavior of precracked concrete beams retrofitted with FRP.” J. Compos. Constr. 2 (3): 138–144. https://doi.org/10.1061/(ASCE)1090-0268(1998)2:3(138).
Choi, H., J. West, and K. Shudki. 2011. “Effect of partial unbonding on prestressed near-surface-mounted CFRP-strengthened concrete T-beams.” J. Compos. Constr. 15 (1): 93–102. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000149.
CSA (Canadian Standards Association). 2012. Design and construction of building structures with fibre-reinforced polymers. CAN/CSA S806–12. Mississauga, ON, Canada: CSA.
CSA (Canadian Standards Association). 2014a. Canadian highway bridge design code. CAN/CSA S6–14. Mississauga, ON, Canada: CSA.
CSA (Canadian Standards Association). 2014b. Design of concrete structures. CAN/CSA A23.3–14. Mississauga, ON, Canada: CSA.
Green, M. F., A. J. S. Dent, and L. A. Bisby. 2003. “Effect of freeze–thaw cycling on the behaviour of reinforced concrete beams strengthened in flexure with fibre reinforced polymer sheets.” Can. J. Civ. Eng. 30 (6): 1081–1088. https://doi.org/10.1139/l03-059.
Lihua, H., L. Yujing, and W. Yuefang. 2013. “Strengthening effects of BFRP on reinforced concrete beams.” J. Southeast Univ. 29 (2): 182–186.
Masoud, S., K. Soudki, and T. Topper. 2001. “CFRP-strengthened and corroded RC beams under monotonic and fatigue loads.” J. Compos. Constr. 5 (4): 228–236. https://doi.org/10.1061/(ASCE)1090-0268(2001)5:4(228).
Newhook, J., A. Ghali, and G. Tadros. 2002. “Concrete flexural members reinforced with fiber reinforced polymer: Design for cracking and deformability.” Can. J. Civ. Eng. 29 (1): 125–134. https://doi.org/10.1139/l01-085.
Rezazadeh, M., H. Ramezansefat, and J. Barros. 2016. “NSM CFRP prestressing techniques with strengthening potential for simultaneously enhancing load capacity and ductility performance.” J. Compos. Constr. 20 (5): 04016029. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000679.
Sim, J., C. Park, and D. Y. Moon. 2003. “Characteristics of basalt fiber as a strengthening material for concrete structures.” Composites Part B 36 (6–7): 504–512. https://doi.org/10.1016/j.compositesb.2005.02.002.
Tomlinson, D., and A. Fam. 2014. “Performance of concrete beams reinforced with basalt FRP for flexure and shear.” J. Compos. Constr. 19 (2): 04014036. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000491.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 22 • Issue 4 • August 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Mar 28, 2017
Accepted: Jan 29, 2018
Published online: May 3, 2018
Published in print: Aug 1, 2018
Discussion open until: Oct 3, 2018
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.