In order to reduce the Portland cement usage in concrete manufacturing several eco-friendly mix design has been proposed in literature, through the recourse to bio-natural products. Such technologies aim to reduce the global warming and the CO2 emission during cement manufacture. In this respect, bilayer-composite beams prepared with ordinary and clay-based concrete externally reinforced with flexural and shear GFRP-Jacket were designed and simulated in the present work. Indeed, nonlinear finite element simulations were established to evaluate the four-point bending and shear features of the suggested all composited beams. Accordingly, the novelty of this study is to propose and to validate nonlinear models (NLFEM) able to model the material behavior of concrete and clay based-concrete through an elastic-plastic damage model and anisotropic model for the constitutive behavior modelling of composite laminates. The accentuated numerical results in terms of local and global behavior are correlated with a high agreement to experimental ones.