Avaliação dos efeitos da não linearidade física e geométrica sobre o dimensionamento de pilares

Abstract

The ABNT NBR 6118:2014 – Design of concrete structures presents some methods for considering the geometric nonlinearity, that causes the second degree effects, needing to be provided in the structural calculation for a higher level of security in the desing, among them the P-Delta method and the increase over the coefficient . In addition, the standard also informs the necessity of considering the physical nonlinearity wich affects the material properties, causing the rigidity decrease of reinforced concrete elements. Thus, two ways are proposed to consider these effects: the moment-curvature diagram, present in the item 15.3.1, and the reducing coefficients of the item 15.7.3. Aiming to compare the methods and considerations, this work will show analysis with the use of the SAP2000 software, concluding about the influence of these effects in the design of columns.