Research　on　mitigating　progressive　collapse　of　reinforced　concrete　(RC)　flat　plate　structures　has　gained　growing　attentions.　Based　on　alternative　path　method,　extensive　experimental　studies　have　been　conducted　to　simulate　column　loss　scenarios.　However,　limited　research　has　been　performed　on　the　progressive　collapse　of　RC　flat　plate　structures　triggered　by　slab-column　joint　damages　due　to　slab　overloading,　which　is　the　main　cause　of　many　collapse　events.　Moreover,　studies　on　dynamic　responses　of　flat　plate　substructures　are　rather　limited　owing　to　the　complexity　of　the　experimental　design　and　execution.　This　paper　presents　a　preliminary　experimental　test　performed　on　a　1/3-scaled,　2×2-bay　flat　plate　substructure　specimen.　In　this　test,　no　column　was　removed　but　an　extreme　overloading　scenario　was　employed　on　the　slab　to　trigger　damage　to　slab-column　joints,　thereby　stimulating　the　dynamic　behaviour　of　the　structure.　Experimental　results　show　that　brittle　punching　shear　failures　have　led　to　significant　dynamic　responses　on　the　substructure　specimen,　which　was　observed　by　a　sudden　increase　of　accelerations　over　the　middle　region　of　the　slab　when　the　middle　slab-column　joint　was　punched　through.　This　preliminary　test　also　demonstrates　the　feasibility　of　such　an　experimental　setup　and　overloading　design　to　replicate　the　structural　dynamic　behaviour.　The　load-displacement　relationship　and　final　crack　patterns　of　the　specimen　are　also　presented　in　this　paper.　©　13th　International　Conference　on　Shock　and　Impact　Loads　on　Structures,　SILOS　2019.　All　Rights　Reserved.