CONTRIBUTION OF EXTERNALLY BONDED CFRP TO THE SHEAR CAPACITY OF RC BEAMS
CONTRIBUTION OF EXTERNALLY BONDED CFRP TO THE SHEAR CAPACITY OF RC BEAMS
Rehabilitation of deteriorated and aged structures with fiber reinforced polymer has been proven as a successful technique due to its outstanding properties such as resistance to corrosion and high stiffness-to-weight ratio. The purpose of this study is to investigate the contribution of the externally bonded carbon fiber reinforced polymer to the shear capacity of the reinforced concrete beams. For this purpose, three reinforced concrete beams strengthened with carbon fiber reinforced polymer in form of side bonded sheet was investigated. The experimental program consisted of three beam specimens that were strengthened with carbon fiber reinforced polymer. One of the beam specimens was not reinforced with transverse steel reinforcement, while the other two were reinforced with stirrups at 200 and 100mm spacing. The strain of the transverse steel reinforcement and the externally bonded CFRP was recorded and compared. In addition, shear capacity predicted by code provisions was compared to the test results. It was indicated that the presence of the transverse steel reinforcement would reduce the contribution of the CFRP to the shear capacity. In addition, the investigated code provisions underestimate the shear capacity of the RC beams strengthened with CFRP
Keywords:
CFRP, Shear strengthening, Shear capacity, FRP Side bonding,
___
- ACI committee 440. (2008). Guide for the design and construction of externally bonded FRP systems for strengthening existing structures. ACI committee 440.
- ACI 440.2R-02 2011. Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures. Farmington Hills, USA: American Concrete Institute.
- Bousselham, A., & Chaallal, O. (2006). Behavior of reinforced concrete T-beams strengthened in shear with carbon fiber-reinforced polymer-an experimental study. ACI Structural Journal, 103(3), 339.
- Bousselham, A., & Chaallal, O. (2008). Mechanisms of shear resistance of concrete beams strengthened in shear with externally bonded FRP. Journal of Composites for Construction, 12(5), 499–512.
- Bukhari, I. A., Vollum, R. L., Ahmad, S., & Sagaseta, J. (2010). Shear strengthening of reinforced concrete beams with CFRP. Magazine of Concrete Research, 62(1), 65– 77.
- Chen, G. M., Teng, J. G., Chen, J. F., & Rosenboom, O. A. (2010). Interaction between Steel Stirrups and Shear-Strengthening FRP Strips in RC Beams. Journal of Composites for Construction, 14(5), 498–509.
- Chen, G. M., Teng, J. G., Chen, J. F., & Xiao, Q. G. (2015). Finite element modeling of debonding failures in FRP-strengthened RC beams: A dynamic approach. Computers and Structures, 158, 167–183.
- CNR-Italian Research Council, Advisory Committee on Technical Recommendations for Construction, 2013, Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Existing Structures.
- Materials, RC and PC Structures, Masonry Structures (CNR-DT 200/2013). Rome, Italy. Fédération Internationale du Béton (fib)(2010): Shear and punching shear in RC and FRC elements, fib Bulletin 57.
- Fédération Internationale du Béton (fib) (2001). Externally bonded FRP reinforcement for RC structures. Task Group 9.3, Bullettin No. 14, Lausanne,Switzerland.
- Khalifa, A., Gold, W., Nanni, A. & Abdel Aziz, M. I. 1998. Contribution of externally bonded FRP to shear capacity of RC flexural members. Journal of Composites for Construction 2(4): 195-202.
- Oehlers, D. J., Visintin, P., & Lucas, W. (2015). Flexural strength and ductility of FRP-plated RC beams: Fundamental mechanics incorporating local and global IC debonding. Journal of Composites for Construction, 20(2), 4015046.
- pellegrino, C, and M. (2006). Fiber-reinforced polymer shear strengthening of reinforced concrete beams: Experimental study and analytical modeling. ACI Structural Journal, 15(5), 720–728.
- Pellegrino, C., Maiorana, E., & Modena, C. (2009). FRP strengthening of steel and steel-concrete composite structures: an analytical approach. Materials and Structures, 42(3), 353–363.
- Pellegrino, C., & Modena, C. (2008). An experimentally based analytical model for the shear capacity of FRP-strengthened reinforced concrete beams. Mechanics of Composite Materials, 44(3), 231–244.
- Pellegrino, C., & Modena, C. (2009). Flexural strengthening of real-scale RC and PRC beams with end-anchored pretensioned FRP laminates. ACI Structural Journal, 106(3), 319.
- Pellegrino, C., Modena, C., & pellegrino, C, and M. (2002). Fiber reinforced polymer shear strengthening of reinforced concrete beams with transverse steel reinforcement. Journal of Composites for Construction, 6(2), 104–111.
- Pellegrino, C., & Vasic, M. (2013). Assessment of design procedures for the use of externally bonded FRP composites in shear strengthening of reinforced concrete beams. Composites Part B: Engineering, 45(1), 727–741.
- ISSN: 2602-294X
- Yayın Aralığı: Yılda 2 Sayı
- Başlangıç: 2016
- Yayıncı: Gaziantep Üniversitesi
Sayıdaki Diğer Makaleler
AN ALTERNATIVE METHOD FOR THE SUN DRYING OF TRADITIONAL DRIED EGGPLANT
Ghaith AL-QUDSI, Ezgi YAYVAN, Fatih BALCI, Mustafa BAYRAM
ON THE ENERGY STORAGE SITES FOR NATURAL GAS: AN OVERVIEW FOR TURKISH CASE AND REGULATION
ASSESSMENT OF ENERGY MANAGEMENT IN FEED PLANTS: A REVIEW OF NECESSITY AND OBJECTIVE
CONTRIBUTION OF EXTERNALLY BONDED CFRP TO THE SHEAR CAPACITY OF RC BEAMS