ÁBACOS PARA O CÁLCULO DO COEFICIENTE γz A PARTIR DO fck, Do FReq. E DO PARÂMETRO α

Abstract

With the increase of tall and slim buildings, the second order effects analysis has become an increasingly present process during the structural design. Is it a complex process with a large number of calculations, the instability parameters appear as tools for prior knowledge of the magnitude of these undesirable effects, as well as addressing the possibility of dismissing these effects, simplifying the process of structural analysis. Of these parameters, the Gamma-Z is more comprehensive in providing more information about the structure in relation to Alpha, where both are related through second- and thirddegree equations. From these equations, it was possible to create abacuses to obtain, in a simpler way, the Gamma-Z coefficient as a function of Alpha parameter, also considering the variations of the fck, characteristic strength of concrete, and the FReq, coefficient of equivalent reduction for the simulation of the physical nonlinearity of the structure constituting material.