Accounting　for　the　stiffness　damage　and　recovery　of　concrete　and　Bauschinger　effect　of　steel　under　cyclic　loading,this　paper　presents　a　nonlinear　finite　element　analysis　(FEA)　model　of　concrete　encased　concrete　filled　steel　tube　(CECFST)　column　to　reinforced　concrete　(RC)　beam　joints　under　constant　axial　load　in　the　column　and　incrementally　laterally　cyclic　loading　at　the　beam　ends.Both　material　and　geometric　nonlinearity　are　included　in　the　FEA　model,and　the　interaction　between　different　components　inside　the　joint　zone　is　also　considered.The　FEA　model　is　validated　against　previous　cyclic　test　data　of　four　CECFST　column　to　RC　beam　joint　specimens.The　predicted　results　generally　agree　well　with　the　test　data,in　terms　of　failure　mode,and　load-displacement　hysteretic　curves.Then　the　behavior　of　the　composite　joint　is　also　analyzed　using　the　FEA　model.The　stress　and　strain　distributions　of　the　components　in　the　joint　zone　are　evaluated　during　the　whole　loading　process,and　the　failure　mechanism　of　joints　is　clarified.Parametric　studies　are　also　conducted　to　investigate　the　effects　of　important　parameters,such　as　configurations　of　joint,adding　slab,axial　load　level　of　column,and　flexural　capacity　of　beam,on　the　hysteretic　behavior　of　composite　joints.The　analytical　results　of　this　paper　can　provide　a　solid　reference　to　the　seismic　design　of　these　composite　joints　in　practical　projects.　©　2019,　Progress　in　Steel　Buiding　Structures　All　right　reserved.