EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF THE EFFECT OF FIBRE REINFORCED POLYMER ON THE SHEAR STRENGTH OF REINFORCED CONCRETE BEAMS
This paper presents the experimental and analytical results of the contribution of carbon fibre reinforced polymer (CFRP) laminates to the shear strength of RC beams. To assess the efficiency of the carbon fibre reinforced polymer (CFRP) laminates on the strengthened specimens, twelve identical beams of cross-sectional dimensions 150x150x750mm were cast, out of which three are un-strengthened and nine were strengthened with U-wrap strips at 100 mm away from each support at varying CFRP laminates layers of single, double and triple amounts. The prepared specimens were subjected to a three-point bending test. The results obtained revealed that the CFRP laminate increased the shear strength of the strengthened specimens over the control (un-strengthened) by 35.06%, 54.40% and 69.30% for single, double and triple layers of CFRP laminate respectively. The experimental results was also compared with the analytical results obtained based on the equation proposed by Khalifa et al., 1998. The analytical results obtained from the equation closely agreed with the experimental results. Therefore, it implies that the CFRP has the potentials of strengthening shear defiant RC beams.
Baggio, D., Soudki, K., & Noel, M. (2014). Strengthening of shear critical RC beams with various FRP systems. Construction and Building Materials, 66, 634-644.
BS EN. 1008, (2002). Mixing Water for Concrete-Specification for Sampling, Testing, and Assessing the Suitability of Water, Including Water Recovered From Processes in the Concrete Industry, as Mixing Water for Concrete. British Standards Institution, London.
BS EN. 10080, (2005). Steel for the reinforcement of concrete: weldable reinforcing steel: general. Brussels: Central Secretariat.
BS EN. 206-1, (2000). Concrete-Part 1: Specification, performance, production and conformity. British Standards Institution.
BS EN 1992-1: Design of concrete structures Part 1 â€“1 â€“ General rules and rules for buildings -Part 1-2 â€“ General rules â€“ Structural file design. British Standard Institution, 2004.
BS EN 197-1, (2011). Cement. Composition, specifications and conformity criteria for common cements.
Karzad, A. S., Al Toubat, S., Maalej, M., & Estephane, P. (2017). Repair of reinforced concrete beams using carbon fiber reinforced polymer. Paper presented at the MATEC Web of Conferences.
Khalifa, A., Gold, W. J., Nanni, A., & MI, A. A. (1998). Contribution of externally bonded FRP to shear capacity of RC flexural members. Journal of composites for construction, 2(4), 195-202.
Maeda, T. (1997). A study on bond mechanism of carbon fiber sheet. FRPTCS3, 1, 279-286.
Manosr, G., Katakalos, K., Theofanous, M., Kozikopoulos, E., & Upgrade, S. (2013). Experimental And Numerical Investigation Of Rectangular R/C Beams Retrofitted Against Shear Utilizing CFRP Strips. No. June, 12-14.
Module, I. E. (2004). An Introduction to FRP Strengthening of Concrete Structures. Prepared by ISIS Canada. A Canadian Network of Centres of Excellence.
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.
Triantafillou, T. (1997). Shear strengthening of concrete members using composites. Paper presented at the Third International Symposium on Non-Metallic (FRP) Reinforcement for Concrete Structures.
Triantafillou, T. C. (1998). Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites. ACI structural journal, 95, 107-115.
Triantafillou, T. C., & Antonopoulos, C. P. (2000). Design of concrete flexural members strengthened in shear with FRP. Journal of composites for construction, 4(4), 198-205.
Copyright (c) 2020 FUDMA JOURNAL OF SCIENCES
This work is licensed under a Creative Commons Attribution 4.0 International License.
FUDMA Journal of Sciences