Review article

The paper presents the results of the study by the finite element method of a reinforced concrete beam with the application of a physical model to concrete in the form of a deformation modulus as a nonlinear function of the stress level and time which is built on the basis of a universal model of concrete deformation and fracture. The loading mode with a constant rate of uniformly distributed load growth, prolonged exposure to constant loading and subsequent reloading up to damage is considered. The dynamic processes of crack formation are modeled, the load-bearing capacity values obtained in the study is compared with its standard value, and the relative integral rigidity of the beam in its operational state is estimated.