This study investigated the seismic retrofit methods of existing RC frame, strengthening using RC elements and compared the lateral force resistance capacity and ductile deformation capacity under lateral cyclic loads of tranditional nonductility RC frames, moment-resisting reinforced concrete frames, nonstructural RC walls ( wing-walls, openings, slits walls, CFRP ). And investigated the feasibility in engineering of seismic retrofit methods according to the norms, experimental data and eelated research paper.