Use of analytical method for calculating stiffnesses of straight waffle slabs

Introduction . The analysis of analytical and computer-assisted calculations waffle slabs shows that, depending on the established finite-element model structure geometry, forces in beams can vary significantly. As a rule, is used as reference when comparing bending moments. Examples available literature show that regardless slab stiffness individual central orthogonal or conditionally selected determining structural loads. Aim In this work, accuracy resulting straight was assessed using calculation. Materials methods work carried out by moments obtained analytically SCAD software method for having various stiffnesses zones slabs. 12.0 × m square plan different aspect ratios were considered, well 1.5 waffles spans. A T-beam-and-girder construction computer model. Results values caissons calculated coincide, being particular case. rectangular differ. ratio span caisson sides increases, these deviations increase. Conclusions general calculation, determination leads to erroneous results.