Parameters＇　change　of　expansion　joints　has　significant　impact　on　the　vehicle-induced　dynamic　response　of　bridges.　However,　it　is　uneconomical　to　conduct　health　monitoring　to　evaluate　the　technical　condition　of　expansion　joint.　To　indirectly　evaluate　the　service　performance　of　expansion　joint　and　clarify　the　impacts　from　variations　of　the　expansion　joint　parameters　on　the　vehicle-bridge　coupling　vibration　response,　an　analysis　method　of　vehicle-expansion　joint-bridge　coupling　vibration　(VBCV-J)　was　established　and　verified.　Then,　taking　a　long-span　concrete　filled　steel　tubular　arch　bridge　as　the　prototype,　the　vehicle-bridge　coupling　vibration　response　were　studied　using　the　VBCV-J　model　while　considering　the　cases　of　design　parameters　and　variation　parameters　of　the　expansion　joint.　The　results　show　that,　for　the　design　parameters,　the　dynamic　amplification　factor　(DAF)　of　the　expansion　joint　and　the　beam-end　measuring　points　of　the　main　girder　are　significant.　The　DAFs　of　the　short　suspenders　near　the　expansion　joint　is　also　greater　than　that　of　suspenders　in　the　1/4　span　and　1/2　span.　For　the　variable　parameters,　the　variation　in　the　height　difference　between　the　middle　transverse　girder　and　the　side　transverse　girder　will　lead　to　a　significant　increase　in　the　vehicle-induced　impact　on　the　end　of　the　main　girder,　the　short　suspender,　and　in　the　reaction　force　of　the　supports.　The　decrease　of　the　support　stiffness　will　also　make　the　DAFs　of　the　above　components　exceed　the　design　value.　The　variation　of　the　vehicle-induced　dynamic　response　of　main　beam-end　and　suspenders　can　indirectly　reflect　the　service　performance　of　expansion　joint.