Study on static mechanical behavior of spatial cable supported composite floor system

As modern society rapidly evolves, traditional large-span floor structures increasingly fail to meet the demands of modern large-span spaces. This study introduces an innovative spatial cable supported composite floor system. Field tests and finite element analyses, accounting for the construction process, were conducted to evaluate the overall deformation capacity, bearing capacity, and key parameter influences of the structure under vertical static loads. Test results reveal that when the load reaches 1.4 times the basic combined load, the mid-span deflection is 5.03 mm—just one-third of the allowable value specified in the code—demonstrating the excellent bearing performance of the spatial cable-supported composite floor. Finite element simulation results indicate that the construction process impacts the floor's bearing performance. The inclusion of the cable-strut system significantly enhances the floor's ultimate bearing capacity and allows for coordinated deformation with the upper structure. Compared to a conventional primary and secondary beam floor, the composite floor's bearing capacity increases by 22 %. The inner and outer cable-strut systems serve distinct roles and exhibit spatial force transmission characteristics.