A　generalized　cyclic　steel　model　characterized　by　isotropic　and　kinematic　hardening,　inelastic　buckling　in　compression　and　corrosion　of　rebars　in　reinforced　concrete　(RC)　structures　is　presented.　The　model　has　been　implemented　in　a　fiber　code,　to　perform　seismic　analyses　of　RC　sections.　The　model　is　particularly　accurate　with　respect　to　experimental　cyclic　behavior　of　rebars　with　buckling　in　compression　when　the　strain　does　not　exceed　1.5%.　Twelve　configurations　of　RC　cross　sections　were　selected　as　case　studies　for　three　geometries　and　different　steel　arrangements,　assumed　representative　of　RC　columns　or　bridge　piers　(in　a　suitable　scale).　Each　section　was　subjected　to　two　groups　of　cyclic　curvature　histories　representative　of　severe　seismic　loads,　not　far　from　collapse.　Different　axial　loads　and　corrosion　percentages　(no　corrosion,　moderate,　or　high)　have　been　selected　to　perform　cyclic　parametric　analyses.　One　of　the　cases　was　taken　from　an　experimental　test　on　columns,　deriving　also　steel　characteristics　used　in　all　numerical　cases.　The　results　of　the　comparison　among　RC　sections　have　been　discussed.　Numerical　results　show　that　the　maximum　compressive　strain　for　steel　rebars　is　always　smaller　than　1.5%,　therefore　the　proposed　steel　model　is　accurate　and　represents　a　valid　tool　for　structural　assessment.　Corrosion　reduces　RC　section　capacity,　affecting　various　rebar　mechanical　characteristics,　in　particular　buckling　behavior.