Comparative Study Of The Vertical Displacement Of Fibre Reinforced Polymer Reinforced Concrete Beams And Steel Reinforced Concrete Beams

In this study the vertical displacements of three different fiber reinforced polymer Carbon FRP Glass FRP and Aramid FRP reinforced concrete beams where compared with that of steel reinforced concrete RC beams for three different single span beams having different loading arrangement. The direct stiffness method of analysis was used to obtain the deflection equations for the beams. The results show that irrespective of the beam configuration and loading condition the vertical displacement of FRP rebars are more than that of steel rebar. Mathematical models were developed relating the vertical displacements of the steel RC beams with the three FRP RC beams. It shows the ratios of CFRP to Steel GFRP to steel and AFRP to steel as 1.3605 4.651 and 1.6129 respectively. Other ratios obtained are CFRP to GFRP CFRP to AFRP and AFRP to GFRP as 3.4186 1.1855 and 2.8837 respectively. The results obtained clearly shows that Carbon FRP CFRP has relatively less vertical displacement when compared with GFRP and AFRP. Thus it can be concluded if FRP should be used as rebar CFRP should be considered. Also the developed models should serve as a benchmark in reducing the vertical displacement of FRP rebar to the acceptable limits contained in design codes.