Análise paramétrica de vigas mistas de aço e concreto armado com e sem protensão.

Abstract

Steel structures are adopted in several countries around the world, mainly in developed countries such as the United States and Germany. In Brazil, the use of these structures is still small compared to the reinforced concrete system. The combination of reinforced concrete and steel reveals itself as an excellent alternative capable of reducing costs, taking advantage of the constructive advantages of steel structures and optimizing the structural structural behavior. In addition, the association of the composite beam and prestressing allows the creation of structures with enormous structural efficiency and is justified, in some cases, by the need for a certain structure to overcome large spans with economy and high loads with smaller transversal reinforcements. The present research aims, through the use of the STRAP calculation software, to make a comparison between the structural behavior of a composite steel and prestressed concrete beam and the behavior of this beam without the use of prestressing. Thus, it performs a parametric analysis of 9 (nine) different beam heights and compares the results obtained. Thus, the choice for a given system is discussed in order to determine the most advantageous solution, observing the conditions defined in the model.