Reinforced　concrete　(RC)　flat-plate　structures　are　vulnerable　to　punching　shear　failure　at　their　slab-column　connections,　potentially　leading　to　a　catastrophic　progressive　collapse.　In　practice,　the　slab-column　connection　above　an　interior　column,　removed　due　to　abnormal　loads,　may　be　subjected　to　a　concentrated　downward　force　because　of　the　absence　of　the　supporting　column　and　further　being　pushed　as　a　result　of　different　live　load　intensities　on　individual　stories.　This　force　is　different　from　the　full　design　load　that　the　column　withstands　in　normal　situations　and,　combined　with　the　gravity　load　acting　on　the　slab,　may　cause　punching　shear　failure　at　the　interior　slab-column　connection.　This　will　further　trigger　failure　propagation　to　the　surrounding　slab-column　connections.　This　paper　presents　the　experimental　tests　performed　on　two　identical　large-scale　2x2-bay　RC　flat-plate　specimens　under　an　interior　column　removal　scenario.　A　5-kPa　uniformly　distributed　load　was　applied　first　to　the　slab　followed　by　an　incremental　concentrated　force　imposed　on　the　slab-column　connection　above　the　removed　interior　column.　The　complete　collapse-resistant　behavior　and　load　redistribution　pattern　of　the　specimens　were　investigated　and　are　reported　herein.　Results　show　that　more　than　90%　of　the　applied　concentrated　force　is　solely　distributed　to　the　four　nearest　adjacent　columns.　Three　load-carrying　mechanism　phases,　in　the　form　of　flexural,　tensile　membrane,　and　a　combination　of　one-way　catenary　and　dowel　actions　can　be　distinguished　in　resisting　the　applied　concentrated　load.