STRENGTHENING OF REINFORCED CONCRETE BEAMS WITH CARBON FIBER REINFORCED POLYMERS | ||
| ERJ. Engineering Research Journal | ||
| Article 13, Volume 32, Issue 2, April 2009, Pages 223-231 PDF (1.36 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/erjm.2009.69419 | ||
| Authors | ||
| Ayman G. Abdel-Rahman; Faiz A. Mirza | ||
| Civil Engineering Department, College of Engineering and Islamic Architecture Umm Al-Qura University, P.O. Box 6298, Makkah, Saudi Arabia | ||
| Abstract | ||
| Strengthening of structures is a complex task. Different systems can be used in order to utilize the fiber reinforced polymer in the most efficient way. Two techniques for surface reinforcement in reinforced concrete beams are addressed in this paper, namely, extemally bonded laminates (EBL) and near surface mounted strips (NSM). The experimental work involves seven !XI-scale reinforced concrete beams strengthened with carbon fiber reinforced polymers (CFRF') and tested up to failure to illustrate two methods of field application and construction techniques of strengthening. The performance and effectiveness of these techniques are demonstrated by comparing the test results of both strengthened and un-strengthened beams. Test results indicate that both techniques are effective in increasing the flexural capacity of R.C. beams. Also it was observed that the beams strengthened with NSM reinforcements show different failure modes than the externally bonded FRP. Applications of the two methods of strengthening R.C beams are suitable for all cases, but prior to the installation of surface bonded CFRP reinforcement, attention should be directed toward investigating the surface concrete on which the composites are to be bonded. | ||
| Keywords | ||
| Flexural Strengthening; Carbon Fiber Reinforced Polymers; Externally Bonded Laminates; Near Sulfate Mounted Strips; Modes of Failure | ||
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