TABELAS PARA O CÁLCULO DO COEFICIENTE GAMA-Z A PARTIR DO fck, DO FReq. E DO PARÂMETRO ALFA

Abstract

With the increasing tendency to build taller and slender buildings and consequently more subject to the effects of global instability, this trend is associated, for example, with the purchasing value of the space to be built, its availability or due to the architectural requirements of the project, therefore based on the factors mentioned, the author focuses on presenting a review of the studies of researchers, of the recommendations established by the current regulations, on the parameters of global stability, in general it is important to emphasize that the need to know the Global behavior of the structure is the main object of study and for that, ABNT NBR 6118:2014 recommends the use of the Gamma-Z coefficient, however, it presents a more laborious calculation than that of the Alpha parameter, which is also recommended by the mentioned standard, thus the author is dedicated to presenting equations and tables that correlate and allow estimating the value of the Gamma-Z coefficient as a function of that of the value of the global Stability parameter Alpha, of concrete resistance characteristic to compression (fck), and of the equivalent reduction factor (fReq).