The　design　for　traditional　steel　rigid　connection　cannot　fulfill　the　desired　seismic　requirements.　Though　beam-column　connections　with　reduced　beam　end　section　can　approximately　realize　the　concept　about　＇strong　column-weak　beam＇,　the　local　buckling　in　the　weakened　zone　may　be　occur　in　strong　earthquake　and　the　capacity　is　not　enough.　The　filled　connection　with　low　yield　point　steel　is　proposed　base　on　the　concept　of　earthquake　resilient　structure.　In　this　connection,　the　weakened　parts　in　the　flange　and　web　plate　are　filled　with　low　yield　point　steel,　and　the　low　yield　point　steel　firstly　yields　and　dissipates　energy　sufficiently　in　earthquake.　Hence,　the　damage　of　the　main　parts　in　the　connection　is　minor　and　the　low　yield　point　steel　can　be　replaced　after　the　earthquake.　According　to　the　insufficiency　of　the　existing　seismic　damage　models,　the　damage　model　based　on　differential　ratio　of　elasto-plastic　dissipated　energy　is　proposed.　Low　cycle　loading　experimental　research　was　carried　out　on　three　types　of　connections　which　included　traditional　connection,　beam　end　weakened　connection　and　filled　connection.　Comprehensive　assessments　of　damping　performance　are　proposed　through　a　variety　of　performance　evaluation　parameters.　It　is　proved　that　the　filled　connection　has　excellent　bearing　capacity,　ductility　and　energy　dissipation　capacity.　In　addition,　the　proposed　energy　damage　index　can　represent　damage　evolution　process　and　damage　law.　©　2017,　Editorial　Office　of　Journal　of　Building　Structures.　All　right　reserved.