In this final year project, a nonlinear static analysis has been carried out on a reinforced concrete two-bay frame structure under gravity loads and monotonically increasing horizontal loads. Based on the data on the dimensions of the cross sections, the quality of the materials and the quantity and arrangement of the reinforcement, the bending moment-rotation diagrams in the plastic hinges were first determined. These diagrams were described using two points: the bending moment when the reinforcement yields and the bending moment at the section failure. The effect of concrete confinement due to densely placed ties in the critical area was taken into account. Then a nonlinear static pushover analysis was carried out in the SeismoStruct software package. Columns and beams were modelled by linear elastic elements, while plastic hinges were defined by connecting elements (links), in which previously defined bilinear moment-rotation diagrams are embedded. According to EN 1998-3:2011, three limit states were considered: the limit state of near collapse, the limit state of significant damage and the limit state of damage limitation. The sequence of formation of plastic hinges is shown, and the behaviour of the frame is evaluated. Plastic hinges were formed in the beams and at the base of the columns, which proved the desired failure mechanism in an earthquake (strong columns and weak beams).