Análise comparativa entre lajes bubbledeck e lajes lisas maciças

Abstract

Because there is always a great search for savings in construction works, several construction systems of slabs have been developed in order to meet the current demand of structural projects of buildings that require ever more distant collumns. The need for large span lenght leads to large thickness of slabs, thus causing a large consumption of concrete, rendering the traditional solution in massive slab uneconomical. In this scenario, the Bubbledeck slab construction system presents a solution to this problem, offering the same efficiency as traditional slabs, with a lower consumption of concrete, steel, savings in formwork, relief of foundations, increased productivity because it is an industrialized process and in addition this tecnologie has importants environmental certificates. This work presents the constructive systems of this type of slab, showing its main characteristics and its advantages, it is also done a case study, dimensioning a slab of the Bubbledeck type and the Lisa type, comparing among them some parameters such as armature rate, volume of concrete and characteristic moments.