Floor　slabs　are　important　components　of　frame　structures　which　largely　affect　the　structural　progressive　collapse　performance.　This　paper　presents　a　simplified　numerical　simulation　method　for　reinforced　concrete　(RC)　slabs.　A　RC　slab　is　discretized　along　two　directions　transferring　into　a　beam　network.　The　meshes　at　each　direction　are　simulated　by　fiber　beam　elements　to　consider　the　composite　mechanical　behavior　of　steel　reinforcement　and　concrete.　In　this　method,　beam-slab　joints　at　the　edge　area　of　slabs　are　simulated　by　fiber　beam　elements　with　T/L　sections,　by　which　the　effects　of　slabs　on　the　bending　behavior　and　the　damage　mode　of　the　beams　under　small　deformation　in　progressive　collapse　are　considered.　On　the　other　hand,　fiber　beam　elements　with　rectangle　sections　are　used　to　simulate　the　interior　area　of　slabs,　by　which　the　tensile　membrane　action　of　slabs　under　large　deformation　can　be　considered.　This　method　can　not　only　avoid　the　high　stiffness　problem　when　using　shell　elements,　but　also　greatly　improve　the　efficiency　of　the　calculation　of　the　whole　structure.　Finally,　existing　tests　on　special-shaped　columns　(T/L　cross　sections),　one-way　slabs　and　two-way　slabs　are　simulated,　respectively.　The　results　show　that　the　simplified　method　can　efficiently　and　accurately　simulate　the　reinforced　concrete　slabs　under　large　deformation,　providing　a　powerful　tool　for　the　simulation　of　progressive　collapse　analysis　of　whole　structures.　©　2016,　Engineering　Mechanics　Press.　All　right　reserved.