The　isolated　continuous　girder　bridge　with　lead　rubber　bearings　(LRB)　or　friction　pendulum　bearings　(FPB)　was　taken　as　the　research　object　to　analyze　the　collision　effect　under　near-fault　or　far-fault　long-period　ground　motion.　The　parameters　analysis　including　the　stiffness　of　expansion　joint　and　width　of　expansion　joint　have　been　done　based　on　the　3D　FEM.　The　results　show　that　whatever　the　type　of　long-period　ground　motion,　it　has　different　effect　of　width　of　expansion　joint　on　the　force　and　times　of　collision,　and　the　force　and　times　were　decreasing　with　the　increase　of　width　of　expansion　joint.　The　changing　of　stiffness　of　expansion　joint　had　effect　on　maximum　collision　force　only.　Compared　with　two　isolated　structures,　the　collision　effects　of　FPB　structure　were　lower　than　LRB　structure.　©　2015,　Science　Press.　All　right　reserved.