Análise de lajes nervuradas lisas usando o método dos pórticos múltiplos e métodos computacionais

Abstract

The structural system of ribbed flat slabs consists of slabs supported exclusively on pillars, with no beams, and the connection between pillar and slab is made through a solid region. Also, the slab is made up of ribs, and part of the concrete below the neutral line is eliminated and replaced by voids or filling materials, causing a reduction in the weight of the structure. The purpose of this work was to compare bending moments, shear and punching stress, by using the Multiple Portico method, according to NBR 6118 (ABNT, 2014) and computational methods (Eberick software). There was a discrepancy in values, and at bending moments, reinforcement and shear stress the Multiple Portico method presented lower demands. In the case of punching, the results showed greater agreement among themselves, although there are differences, showing that the modeling of the slab flexion was the reason for greater differences in results.