The　deterioration　of　expansion　joints　has　a　significant　effect　on　the　vehicle-bridge　coupling　vibration　response.　To　establish　an　analysis　method　for　the　vehicle-bridge　coupling　vibration　considering　the　influence　of　expansion　joint,　a　single　point　contact　time-varying　force　model　was　proposed　based　on　the　analysis　of　the　vehicle-bridge　coupling　dynamic　responses　and　the　mechanical　characteristics　of　a　wheel　over　joint.　Then,　an　analysis　model　for　the　vehicle-joint-bridge　coupling　vibration　was　established　based　on　the　local　vibration　mode　extraction　and　mode　synthesis　method　and　its　numerical　solution　method.　Its　effectivity　was　verified　by　the　field-testing　data.　Then,　taking　a　three　span　continuous　beam　bridge　as　an　example,　the　influences　of　the　factors　such　as　the　vehicle　passing　through　the　joint,　the　height　difference　of　the　expansion　joint,　the　gap,　the　vehicle　speed,　the　vehicle　layout　and　the　vehicle　weight　on　the　dynamic　responses　of　the　vehicle-joint-bridge　coupling　vibration　was　studied.　The　result　indicates　that　the　expansion　joint　at　the　outside　of　the　end　support　will　reduce　the　displacement　response　of　the　main　beam　in　the　middle　of　the　span,　but　will　increase　the　vehicle　impact　effect　at　the　ends　of　the　bridge.　Under　the　same　bridge　length,　the　vehicle　passing　through　the　joint　will　increase　the　displacement　and　acceleration　responses　of　the　bridge,　and　the　acceleration　response　will　increase　more　obviously.　The　height　difference　of　the　expansion　joint　will　reduce　the　vertical　displacement　response　of　the　first　span,　but　the　vertical　displacement　responses　of　the　other　two　spans　will　increase.　The　height　difference　of　the　expansion　joint　has　a　significant　effect　on　the　vehicle　impact　in　different　regions.　The　vehicle　impact　effect　near　the　expansion　joint　increases　with　the　increase　of　the　expansion　joint　gap.　When　the　vehicle　speed　is　low,　the　fluctuation　of　the　vertical　peak　displacement　and　impact　coefficient　of　the　main　beam　is　slight,　and　the　peak　value　appears　near　the　vehicle　speed　of　80　km/h.　The　dynamic　displacement　of　each　span　of　the　main　beam　increases　with　the　increase　of　the　number　of　vehicles,　but　the　displacement　impact　coefficient　of　each　span　does　not　necessarily　increase.　The　bridge　impact　coefficient　decreases　with　the　increase　of　vehicle　weight.　In　the　design　of　bridges,　the　influence　of　the　change　of　expansion　joint　parameters　on　the　impact　induced　by　vehicles　in　different　regions　of　the　bridge　should　be　considered.　©　2021,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.