The present thesis intended to contribute for the development of a new generation of high durable and sustainable reinforced concrete (RC) beam structures submitted to flexural loading, by combining the benefits that Glass Fiber Reinforced Polymers (GFRP). The main benefit given by the GFRP bars is their corrosion immunity. Furthermore, the Fiber Reinforced Concrete (FRC) was developed to improve the ductility of structures and to provide greater shear strength. One of the advantages of not being attacked by chemicals, is to have the possibility of using a very reduced concrete cover for greater structural functionality. Although, conventional shear reinforcements were not used, they were totally replaced by FRC material and a new 3D positioning geometry of the GFRP bars allowed to help this resistance, even if it is not considered in the design calculations.