Análise comparativa entre as flechas ocorridas em lajes treliçadas com uso de vigotas convencionais e a Trelifácil®

Abstract

As a material composed by the junction of other materials, the concrete is an excellent ally in civil construction, because it has good workability (according to the needs of the project) and is easy to replicate anywhere in the world. Combined with steel, reinforced concrete is formed where it is possible to mold various elements with desired shapes and characteristics, such as structures: pillars, beams, slabs, panels and walls. However, there are limitations in the application of structural concrete, whether they are design, construction, economic or involving the safety of the structure and its users. Concrete must meet some safety criteria and specifications established in Brazilian standards, governed by the Brazilian Association of Technical Standards (ABNT). For this work, comparisons will be made within a specific building system for slabs, the lattice slabs, which is widely used in Brazil. The analysis will be done, verifying the deflection developed, between truss slabs built with traditional joists and slabs built with the Trelifácil® system, which is a recent product on the market, in order to observe the efficiency of this in relation to that one. The results obtained show an efficiency of about 50% in the reduction of the deflections formed in the slabs made using Trelifácil® compared to those with common joists, disregarding the contribution of the concrete base present in these joists. When considering the concrete base, the efficiency of Trelifácil® drops and takes on a negative value, being around 15% lower than common joists, meaning an increase in the deflections.