In　this　paper,　the　seismic　behaviors　of　precast　bridge　columns　connected　with　grouted　corrugated-metal　duct　(GCMD)　were　investigated　through　the　biaxial　quasi-static　experiment　and　numerical　simulation.　With　a　geometric　scale　ratio　of　1:5,　five　specimens　were　fabricated,　including　four　precast　bridge　columns　connected　with　GCMD　and　one　cast-in-place　(CIP)　bridge　column.　A　finite　element　analysis　model　was　also　established　by　using　OpenSees　and　was　then　calibrated　by　using　the　experimental　results　for　parameter　analysis.　The　results　show　the　biaxial　seismic　performance　of　the　precast　bridge　columns　connected　with　GCMD　was　similar　to　the　CIP　bridge　columns　regarding　ultimate　bearing　capacity　and　hysteresis　energy,　and　further,　that　it　could　meet　the　design　goal　of　equivalent　performance.　The　seismic　performance　of　the　precast　bridge　columns　connected　with　GCMD　deteriorated　more　significantly　under　bi-directional　load　than　under　uni-directional　load.　A　proper　slenderness　ratio　(e.g.,　7.0–10.0)　and　longitudinal　reinforcement　ratio　could　significantly　improve　the　energy　dissipation　capacity　and　deformation　capacity　of　the　precast　bridge　columns,　while　the　axial　load　ratio　and　concrete　strength　had　little　influence　on　the　above　properties.　The　research　results　could　bring　insights　to　the　development　of　the　seismic　design　of　precast　bridge　columns　connected　with　GCMD.　©　2021,　Institute　of　Engineering　Mechanics,　China　Earthquake　Administration.