As influências do contraventamento em um edifício de múltiplos pavimentos

Abstract

The structural project of a tall building involves complex steps, for example the definitions of active loads, like wind forces, that results in horizontal displacements of the structure, and the structural analysis, that need to be done from a calculus model that represents the behavior of the structure. Besides, steel structures, when compared for concrete, are thinner, therefor are distabilized easier. Trying to avoid it, several stabilization techniques are applied, like truss bracing, which has a low consumption of material and high efficiency. The usage of this bars, however, changes the behavior of the structure, which makes necessary studies about the influences of it. Thus, this project makes a study about a building with 50 floors, all of them with vertical and horizontal loads, and with differentes structures: without diagonal bars (A); with diagonal bars along the central region (B), and with diagonal bars along the central region and along de floor (C), alternatively. After the analysis of the structures A, B and C, the changes in the requesting efforts and the decrease in the displacements have been noticed. After the analysis of the structures A, B and C, the changes in the requesting efforts and the decrease in the displacements have been noticed. Thus, the the usage of the diagonal bars is effective to increase the truss rigidity in steel structures.