There are large numbers of damaged buildings that need repair/strengthening in Turkey. Consequently, experimental and analytical work on the behaviour of damaged reinforced concrete members, which are repaired/strengthened by different techniques, is vitally important. In this study, specimens tested before under the combined effects of axial and reversed cyclic flexural loads, are repaired and strengthened by steel corners and plates. The repaired and strengthened specimens are then tested in the same conditions as original specimens and the contribution of the repair and strengthening technique on strength, ductility, stiffness and energy dissipation are investigated. Then analytical moment-curvature relationships are obtained by using fiber element approach and it is seen that the analytical results are in good agreement with the experimental data. In the analytical study, confinement effect for concrete, strain hardening and Bauschinger effects for reinforcing steel can be taken into account. At the end of experimental and analytical studies, it is seen that the investigated economical repair and strengthening technique is highly effective on improving the behaviour of reinforced concrete sections, which were damaged previously.