Desempenho estrutural de um novo sistema para construção de lajes.

Abstract

The study of alternative ways to make ordinary activities is a form to inovate and reduce costs. In this perspective, the present work shows a study that started from the attemp to develop a new system for building slabs. This new system is inspired by the prefabricated truss floor slab and would bring benefits if compared to the current system, like the possibility of reusing the mold structure, what allows the structural improvement of materials and the consequent reducing of struts and rebars used in a building. For this, the concrete joists used nowadays would be replaced by other elements, removable after the slab concreting. To create this joist, the models idealized had to be capable to support the concreting and live load without exceed limits imposed by norm. This work evaluate this new system's performance in terms of serviceability limit, that limitates the vertical displacement of the mold structure. To do that, the joists displacements were studied by softwares simulations and experiments. Altought the theoretical analysis show optimistic values, the experiments had quite different results from the simulations that would impossibilitate the system application. Also, the causes of differences between theory and reality for this specific strucure were discussed.