Estudo comparativo de lajes nervuradas em concreto armado e protendido.

Abstract

The use of massive slabs is common in the backlands of Paraíba, especially in the region from Pombal. The search for the use of ribbed slabs, that is, without the use of joists latticework, shows a growing trend for this region. are systems of slabs that are massive at first, but that have voids in their pagination reducing the weight characteristic of the structure and creating the ribs in one or two directions. This work deals of a comparative study between the structural system of bidirectional ribbed slabs and unidirectional in reinforced concrete, as well as in prestressed concrete, performing its structural analyzes with the TQS software and a budget study for the purpose of comparison. From the analyses, it was found which, for the project in question, is more the bidirectional ribbed slab system in prestressed concrete is viable, as it presents a saving of 4.33% compared to the unidirectional ribbed slab in reinforced concrete, 9.31% in relation to the unidirectional ribbed slab in prestressed concrete and 1.61% in relation to the bidirectional ribbed slab in reinforced concrete, in addition to meeting the criteria deformation limit required by standard.