Steel　moment　resisting　frames　are　widely　used　as　seismic　resisting　systems　of　buildings　in　earthquake　regions.　Since　their　satisfactory　performance　is　achieved　by　developing　plastic　deformation　in　critical　regions,　it　usually　leads　to　inter-storey　drift　concentration　during　a　strong　earthquake　and　significant　residual　deformation　after　a　strong　earthquake.　To　mitigate　seismic　damage　concentration　and　excessive　residual　deformation,　this　study　proposed　a　high　post-yield　stiffness　rocking　system,　namely　energy-dissipative　rocking　columns　with　high　strength　steel　tension　braces　(EDR-TB).　The　study　commenced　with　lateral　cyclic　loading　tests　on　the　proposed　EDR-TB　column.　Subsequently,　numerical　model　of　the　EDR-TB　was　built　and　validated　against　test　results.　System-level　nonlinear　static　and　time-history　analysis　were　then　conducted　on　the　steel　frame　with　various　layouts　of　the　EDR-TB　columns.　Compared　with　a　conventional　steel　frame,　the　frame　with　EDR-TB　columns　exhibited　much　reduced　maximum　and　residual　drifts.　In　addition,　the　frame　with　EDR-TB　columns　exhibited　more　uniform　distribution　of　drifts.　The　results　also　reveal　that　an　appropriate　arrangement　of　lateral　resisting　capacity　of　the　EDR-TB　columns　over　the　structural　height　may　achieve　an　enhanced　seismic　performance　of　the　whole　structures.