To　enhance　the　post-earthquake　traffic　flow　capacity　of　bridge　structures,　various　energy　dissipation　braces　(EDBs)　have　been　developed　and　applied.　However,　the　effect　of　various　EDBs　on　the　improvement　of　the　post-earthquake　functionality　of　the　bridge　is　difficult　to　evaluate　mainly　due　to　the　imperfections　in　the　functional　indexes　of　bridge　structures.　This　study　aims　to　quantify　the　multi-level　residual　drift　ratios　of　RC　bridge　piers　based　on　traffic　flow　capacity,　and　to　assess　the　seismic　failure　of　RC　bridge　piers　with　different　EDBs　based　on　traffic　flow　capacity.　To　this　end,　the　traffic　flow　was　categorized　into　five　levels　based　on　the　relationship　between　the　traffic　flow　capacity　and　the　seismic　performance　of　the　bridge.　The　post-earthquake　performance　states　were　evaluated　on　the　basis　of　the　residual　drift　ratio　as　a　performance　indicator,　and　the　corresponding　residual　drift　ratio　thresholds　for　bridge　structures　under　different　function　levels　were　determined　as　0.06%,　0.24%,　0.49%,　and　0.85%　based　on　the　numerical　analysis　results.　Using　traffic　flow　capacity　as　the　limit　states,　the　failure　probabilities　of　the　RC　bridge　bents　with　buckling　restrained　braces　(BRBs)　and　self-centering　energy-dissipation　braces　(SCEBs)　were　further　investigated.　The　results　show　that　traditional　BRBs　show　better　performance　with　respect　to　the　maximum　drift　ratio　while　the　SCEBs　show　better　performance　with　respect　to　the　residual　drift　ratio.　It　is　indicated　that　the　SCEB　is　much　more　effective　in　improving　the　repairability　and　post-earthquake　traffic　flow　capacity　of　the　bridge.