Across Two-way Hollow Plate Structure Finite Element Analysis

This article starts from the great span hollow concrete floor and its application in project. introduction of mechanical behaviors of the great span hollow concrete floor. Especially when concentration applied pretressed on slab strips on column. In the great-span follow structures. considering the stiffness of the hollow concrete floor relatively large and the stiffness of boundary supported beam elatively small, arrangement column in the boundary supported beam,forming four-edges muti-span beam supported an slab,and formed dark beam in the two corresponding intercolumnar. Formed slab strips on column form the dark beam and the slab around the dark beam and concentration applied pretressed on slab strips on column. this structure form can be effective decrease the deflection and cracks on the hollow concrete floor. Improve force performance the hollow concrete floor structure.Based on theory analysis results, equivalent the hollow concrete floor for the Orthotropic real floor. Because this article mainly study on structure performance of hollow concrete floor, concentration applied pretressed on slab strips on column as a simply corresponding line load vused load balance. Based on concepts and Application of upper and lower bound limit analysis, analytical elastic solution for Differential Equations and slab strip method for plate design as a effective lower bound limit analysis,which is used inthe hollow concrete floor when concentration applied pretressed on slab strips on column. considering that the complicated of the concrete force, applied the concrete nonlinear analysis and the frame relationship, as the FEM spatial analysis of structure. Based on the hollow concrete floor possible failure modes, analysis the itsbearing capacity of upper bound limit, that analysis method ofapplied limit of plasticity and plastic hinged lines, which offer reference for structure design.