We consider an articulated reinforced beam from a bimodule material on an elastic base under the action of a concentrated force. Numerical investigation of the influence of the bimodule property of the beam material on the bending moment and deflection is given. The influence of the elastic bedding coefficient on the value of the maximum normal stress, the maximum bending moment and the maximum deflection is shown. Investigations were carried out for fibre-foam concrete beams, for which tensile modulus and compression moduli obtained experimentally are known. Numerical studies have shown that taking into account the bimodulity of the material, that is, taking into account the difference in elasticity modulus between tensile and modulus of elasticity for compression for concrete, leads to the need for calculation of strength both in tensile and compressive stresses.

Keywords: Reinforced beam, bimodule material, normal stress, elastic Winkler base