Abstract
Todays, instead of steel reinforcements, Fiber Reinforced Polymer (FRP) rebars have been using in the reinforced concrete structures. By consideration of different strain-stress behavior between steel and composite material, it is necessary to evaluate the difference of these two materials inside of RC beams. In this research, twelve reinforced concrete T-shape beams were modeled using ABAQUS finite element software. Six of the beams performed as T-shape in which three of them reinforced with FRP rebars and three others were reinforced with steel rebars. As the same as first six beams property, other six beams defined by rectangular performance. The nonlinear static method was used to analysis and load-displacement diagram had been taken to compare the results. The results showed that, the stiffness of T-shape beam is much more than the beams with rectangular performance. Moreover, by comparing FRP and steel rebars, using the FRP rebars reduced stiffness and increased the load capacity.
Highlights
Strengthening by Fiber Reinforced Polymer (FRP) has been using in order to increase to load capacity and ductility of reinforced concrete structures
The FRP rebars has better performance compared with steel rebars like lower density, high strength and etc
The results indicated that, the maximum expected theoretical and calculated force was better in beams reinforced by Glass Fiber Reinforced Polymer (GFRP) bars
Summary
Strengthening by Fiber Reinforced Polymer (FRP) has been using in order to increase to load capacity and ductility of reinforced concrete structures. Saadatmanesh and Ehsani (1998) had studied on the RC beams with were reinforced by Glass Fiber Reinforced Polymer (GFRP) In his evaluation, the longitudinal and transvers rebars were used. Dias and Barros (2017) had investigation on shear strengthening of T-cross section RC beam using Near Surface Mounted (NSM) with CFRP laminate In his experimental research, the result indicated that using this method increased the load capacity and the tensile behavior of beam. In this study, he evaluated the No Model Specification Diameter (mm) Stretch Rebar effect of retrofitting by GFRP sheets and CFRP and GFRP 1 S1.
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