Compared with the traditional beam-slab structure, the flat slab floor structure has the advantages of simple load transmission path, beautiful appearance and outstanding economic benefits. It is widely used in the roof design of residential underground garages. In recent years, there have been many roof collapse accidents of underground garage in China. This makes the safety of the beamless floor become a hot topic. As a common structural form, the flat slab floor structure has the advantages of cost saving and convenient construction, but the...