To　investigate　the　seismic　behavior　of　steel　frame-bent　structure　with　energy　dissipation　braces,　single　specimen　of　five-story　steel　structure　with　BRB　(buckling　restrained　brace,　BRB)　selected　from　a　thermal　power　plant　main　building　was　designed.　Failure　mechanism,　hysteretic　capacity,　stiffness　degradation　law,　inter-story　displacement　and　energy　dissipation　capacity　of　BRBs　were　analyzed　through　low　cyclic　loading　tests.　The　results　show　that　steel　frame-bent　structure　with　energy　dissipation　braces　has　good　lateral　stiffness　and　bearing　capacity.　The　specimen　shows　good　ductility　and　energy　dissipation　capacity,　being　of　plump　spindle　hysteretic　loops,　and　the　equivalent　viscous　damping　coefficient　reaches　0.262,　and　the　coefficient　of　displacement　ductility　exceeds　3.53.　The　BRB　starts　to　yield　at　smaller　loading　displacement　before　beam-column　yields　and　the　energy　dissipation　characteristic　is　obvious,　so　the　viscous　damping　of　structure　is　increased,　resulting　in　an　improved　seismic　performance.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.