ABSTRACT
After several iterations four rectangular, under-reinforced concrete beams modeled in this study. The specimens were divided into two series of control and strengthened beams, according to the specimen’s characteristics. ANSYS finite element program was chosen to perform the analysis. For defining concrete materials, concrete nonlinear material from ANSYS material library was chosen and filled by entering the elastic modulus, compressive strength and Poision’s ratio. The steel for the finite element models was grade 60 steel with 200 GPa elastic modulus and assumed to be an elastic-perfectly plastic material. FRP composites
are materials that consist of two constituents; one constituent is the reinforcement, which is embedded in the second constituent, a continuous polymer called the matrix. Therefore the FRP composites are especially orthotropic material.
