In　order　to　analyze　seismic　behavior　of　large-scale　exterior　joints　of　high-rise　precast　concrete　structures,　an　experimental　study　on　seismic　performances　of　precast　beam　to　column　exterior　joints　with　composite　slab　was　conducted　with　large　full-scale　models.　The　failure　pattern,　hysteretic　characteristic,　skeleton　curve,　displacement　ductility　and　energy　dissipation,　were　analyzed.　The　results　provided　some　information　about　the　seismic　behavior　of　the　joint.　However,　due　to　the　unique　nature　of　the　specimens,　several　other　key　parameters　could　not　be　varied.　Therefore,　a　numerical　joint　model　taking　the　bar　slippage　into　consideration　was　developed　based　on　the　OPENSEES　software　and　validated　against　the　results　of　experimental　test,　then　the　parameters　analysis　was　carried　out.　The　study　results　indicated　that　the　overall　seismic　performance　of　cast-in-place　joint　is　almost　equal　to　that　of　the　monolithic　specimen.　©　(2011)　Trans　Tech　Publications.