Abstract
Fibre Reinforced Polymer (FRP) bars can be used as an alternate for reinforcing bars to avoid corrosion of steel. Samples of reinforced concrete beams cast with normal or steel fibre concrete (SFC), internally reinforced with Glass Fibre Reinforced Polymer (GFRP) or steel bars, are prepared and tested in this paper. Experimental results show that compressive strength of concrete increases with an increase in steel fibre (SF) ratio used in this study (from 0% to 1.5%). Also, the beams reinforced with GFRP bars have a lower initial stiffness and higher ductility than those reinforced with steel bars.
Highlights
Fibre Reinforced Polymer (FRP) bars are currently utilised as longitudinal bars and stirrups for reinforcing various concrete structures such as marine structures, bridge decks, tunnels, parking structures, and water treatment plants
The results have shown that the change in beam tension reinforcement from steel to Glass Fibre Reinforced Polymer (GFRP) for beams cast with normal concrete (NC) results in a decrease of initial stiffness by about 47.4 % for RC beams without steel fibre
In the case of 1.5 % steel fibres, the deformability factor decreased by 12.1 %, 9.8 %, 8.3 %, and 1.2 % for steel, GFRP, AFRP, and CFRP bars, respectively
Summary
Fibre Reinforced Polymer (FRP) bars are currently utilised as longitudinal bars and stirrups for reinforcing various concrete structures such as marine structures, bridge decks, tunnels, parking structures, and water treatment plants. Due to the low values of E and shear modulus (G) of FRP, the arrangement of GFRP profiles with concrete features to resist high loads using a stiffer hybrid structure was a good recommended solution [31,32,33,34,35,36,37,38,39,40,41]. The flexural behaviour and ductility of concrete beams reinforced with GFRP bars and steel fibre are studied experimentally. A non-linear finite element analysis using ANSYS program was conducted to study flexural behaviour of concrete beams reinforced with SF and with different types of FRP bars (glass, aramid and carbon bars)
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