Bridges　are　the　most　vulnerable　junctions　of　the　transportation　system　in　metropolitan　areas,　the　failure　of　which　could　lead　to　significant　damages　of　relative　traffic　network　as　to　functional　incapacitations　of　cities.　The　probable　secondary　disaster　caused　by　the　bridge　failure　also　may　reduce　the　emergency　rescue　efficiency,　so　the　anti-seismic　performance　of　the　transportation　system　is　essential　for　the　reconstruction　and　rehabilitation　of　the　entire　metropolitan　areas　under　earthquake　attacks.　Based　on　Tangshan,　Haicheng,　Wenchuan　earthquake　damage　data　of　bridges,　the　fragility　curve　model　of　the　bridges　is　established　according　to　soil　type　of　the　site　and　construction　time　of　the　bridges.　The　comprehensive　analysis　method　of　seismic　hazard　rapid　assessment　of　a　large　number　of　urban　bridges　is　proposed　which　is　used　to　evaluate　the　damage　of　the　bridges　of　main　road　within　the　beltway　of　Taiyuan　City　under　near-fault　ground　motion.　Compared　with　the　previous　bridge　vulnerability　model,　the　proposed　bridge　vulnerability　model　can　be　used　to　evaluate　the　seismic　damage　of　bridges　more　accurately.　It　provides　theoretical　basis　for　the　reconstruction　and　reinforcement　of　urban　bridges,　rapid　recovery　after　the　earthquake,　and　also　provides　necessary　support　for　the　decision　of　emergency　rescue　after　the　earthquake.　©　2017　Science　Press.　All　rights　reserved.