End-corrosion　is　typical　damage　to　steel　bridge　piers,　which　will　reduce　the　seismic　performance.　Unlike　overall　uniform　corrosion,　end-corrosion　results　in　more　complex　stresses　on　bridge　piers,　however,　there　are　few　related　studies.　This　study　aims　to　analyze　the　mechanical　performance　of　corroded　bridge　piers　and　to　establish　a　method　for　evaluating　the　seismic　damage　status　of　steel　piers　considering　circumferential　uniform　end　-corrosion.　Firstly,　the　effect　of　corrosion　parameters　on　key　performance　points　of　bridge　piers　is　quantitatively　analyzed　using　the　validated　finite　element　model.　The　calculation　method　of　critical　displacement　value　corresponding　to　different　damage　states　of　the　end-corroded　bridge　pier　is　proposed.　A　high-precision　fiber　beam　element　analysis　model　is　developed　to　simultaneously　consider　the　effects　of　end-corrosion　and　shear　stiffness　variation.　The　results　show　that　the　degradation　degree　of　yield　displacement　of　the　end-corroded　bridge　pier　is　relatively　small.　In　contrast,　the　ultimate　displacement,　capacity　point　displacement　and　bearing　capacity　are　significantly　affected　by　corrosion　parameters,　and　the　degradation　degree　after　corrosion　can　reach　more　than　30%.　The　pier　damage　ratio　formula　proposed　in　this　study　can　accurately　describe　the　degradation　of　the　ultimate　value,　and　the　calculation　error　is　almost　controlled　within　15%.　The　multi-node　variable　section　(MNVS)　fiber　beam　model　proposed　in　this　study　has　higher　analysis　accuracy,　which　can　be　improved　by　more　than　16%　compared　with　the　traditional　fiber　beam　model.　In　addition,　the　accuracy　of　the　MNVS　model　in　the　dynamic　analysis　is　verified　by　inputting　the　seismic　records　under　three　site　conditions.　Finally,　considering　the　characteristics　of　end-corrosion,　an　evaluation　method　and　procedure　for　seismic　damage　status　of　the　steel　pier　with　end-corrosion　is　established.