Stiffness of Post-Tensioned Girderless Floor With Different Column Grids

Abstract

The paper considers models of monolithic flat floor slabs with five spans in both directions. The cell sizes are 6×6m, 6×9m, and 6×12m. The calculation method is based on the application of temperature load and rope modeling of rod elements. It is shown that post-stressing should be used for slab side lengths over 7 m, as the installation of pre-stressed reinforcement for shorter lengths is less feasible and causes high economic costs.

Keywords

• reinforced concrete slab
• stiffness
• deflection
• column grid
• post-tension