The　performance　design　for　traditional　steel　rigid　connection　cannot　fulfill　the　desired　seismic　requirements.　Though　beam　column　connection　with　weaken　beam　end　can　approximately　realize　the　concept　about　＂strong　column-weak　beam＂,　the　local　buckling　and　the　distortion　buckling　in　the　weaken　zone　and　the　total　lateral　damage　maybe　occur　in　rare　earthquake　and　the　capacity　is　not　enough.　The　replacement　connection　with　low-yield-point　steel　(LYPS)　is　proposed　base　on　the　idea　of　resilient　structure,　and　its　weakened　parts　in　the　flange　slab　and　web　plate　are　filled　with　LYPS.　During　earthquake,　the　LYPS　primarily　yields　and　fully　dissipates　energy.　The　damage　of　the　main　parts　in　the　connection　is　minor　and　the　LYPS　can　be　replaced　after　the　earthquake.　According　to　the　insufficiency　of　the　traditional　damage　models,　the　damage　model　based　on　differential　ratio　of　elastic　plastic　dissipated　energy　is　proposed.　Low　cycle　loading　experimental　research　is　carried　out　on　three　kinds　of　beam-column　connections,　which　involve　the　classic　connection,　the　beam　end　weaken　connection　and　the　replacement　connection.　Comprehensive　assessments　of　damping　performance　are　proposed　through　a　variety　of　performance　evaluation　parameters.　It　is　approved　that　the　replacement　connection　has　much　more　excellent　bearing　capacity,　ductility　and　energy　consumption　ability.　In　addition,　the　proposed　energy　damage　index　can　represent　damage　evolution　process　and　damage　law.　Copyright　(C)　2021　by　The　Hong　Kong　Institute　of　Steel　Construction.　All　rights　reserved.