SCAD model of solid finite elements: calculation of reinforced concrete waffle slabs

Introduction . Current requirements for structural engineering oblige designers to use structures capable of resisting progressive collapse. Such include multiribbed reinforced concrete waffle slabs. Spatial systems are multiple indeterminate, their calculation is carried out in software based on the finite element method. Models ribbed can be developed from different types elements. The forces determined by models vary significantly, which confirmed examples available literature. Aim To detect a simple and accurate model computer-aided calculating slab. Materials methods study was comparing bending moments obtained analytically SCAD method beams slabs 12.0 × 18.0 m plan with caissons 1.5 2.25 m. bar consisting T-beam-and-girder construction solid bulk elements calculated. Results moments, calculated both using model, have similar values. maximum deviations computer analytical -3.2 +2.6 %. values when -9.2 +4.0 Conclusion solving volumetric problem elastic theory, an effective verification studying complex systems; however, it time-consuming difficult data analysis. A recommended individual or critical zones.