To　investigate　the　influence　of　critical　parameters　on　the　progressive　collapse　resistance　of　reinforced　concrete　(RC)-flat　plates,　a　set　of　finite-element　modeling　techniques　was　established.　The　modeling　of　bond-slip　behavior　between　concrete　and　rebars　was　especially　highlighted,　which　was　found　to　have　a　significant　impact　on　the　performance　of　flat　plates.　Employing　the　modeling　strategy,　our　previously　tested　2　x　2-bay　flat　plate　substructure　(S-1)　and　a　similar　specimen　(ND)　in　the　literature　were　simulated　for　model　validation.　Key　structural　behaviors,　including　tensile　membrane　and　suspension　actions　in　the　large　deformation　stage,　could　be　accurately　replicated.　Further,　the　validated　S-1　model　was　used　to　conduct　a　series　of　parametric　studies　in　which　the　influence　of　concrete　strength,　slab　thickness,　and　reinforcement　ratio　on　the　collapse　performance　was　examined.　The　results　indicated　that　the　concrete　strength　and　the　slab　thickness　only　affected　the　slab　flexural　capacity　with　no　impact　on　the　load-carrying　capacity　after　the　initial　flexural/shear　failure.　Moreover,　the　load-carrying　capacity　due　to　tensile　membrane　action　was　primarily　governed　by　the　reinforcement　ratio.　Further　examination　on　the　lateral　stiffness　suggested　a　lower　bound　ultimate　flexural　strength　enhancement　of　17%,　due　to　the　compressive　membrane　action,　can　be　obtained.　(C)　2020　American　Society　of　Civil　Engineers.