This　paper　presents　the　progressive　collapse　experiment　efforts　in　beam-column　assemblies　with　WUF-B　connections　after　fire　exposure.　A　refined　numerical　simulation　approach　that　considers　the　damage　and　failure　for　ductile　metals　was　introduced　to　understand　the　structural　response　of　the　post-fire　specimens.　The　established　numerical　model　could　effectively　simulate　the　failure　patterns,　key　fracture　phenomenon,　load–displacement　response,　as　well　as　strain　evolutions　of　the　specimens.　Subsequently,　an　abundance　of　parametric　studies　was　performed　based　on　the　validated　numerical　approach　to　investigate　the　effects　of　variable　configurations　of　WUF-B　connections　on　the　progressive　collapse　resistant　performance　of　the　beam-column　assemblies.　It　was　demonstrated　that　the　vertical　resistance　and　deformability　of　the　post-fire　assemblies　could　be　obviously　improved　by　enlarging　the　shear　plate　thickness.　However,　the　bolt　preload　exerted　little　influence　on　the　structural　behaviors　of　the　post-fire　assemblies　under　column　removal　scenarios.　For　the　assemblies　with　WUF-B　connections,　increasing　the　end　distance　between　the　inner　bolt　hole　and　the　middle　column　flange　(namely,　parameters　a)　as　well　as　decreasing　the　vertical　bolt　hole　spacing　(namely,　parameters　c)　could　effectively　enhance　the　vertical　resistance　and　deformability　of　the　specimens.　On　account　of　the　remaining　unchanged　crack　propagation　and　force　transfer　path　of　the　specimen,　the　horizontal　bolt　hole　spacing　(namely,　parameters　b)　negligibly　influenced　the　structural　response　of　the　specimens.　In　the　anti-collapse　design　of　the　assemblies　with　WUF-B　connections,　it　was　suggested　to　appropriately　increase　the　values　of　parameters　a　and　b,　but　properly　reduce　these　of　parameter　c　on　the　premise　of　meeting　the　designed　bolt　configurations,　which　was　more　conducive　to　the　formation　and　development　of　the　catenary　actions.　Eventually,　two　typical　reinforcement　methods　used　for　the　post-fire　assemblies　were　also　numerically　studied　and　compared　in　terms　of　the　structural　behaviors　of　strengthening　specimens　against　progressive　collapse.　©　2022