Estudo comparativo entre o dimensionamento de estrutura metálica feito pela NBR 8800:2008 e pelo Eurocode 3.

Abstract

In this work is discussed about the use of the constructive system in metallic structures in Brazil and Europe, as well as the many considerable advantages of this system when defining the project. It is also shown how is organized the system of European structural standards, in particular the Eurocode 3, 2005, which deals with the design of steel structures in Europe. It is described about the elastic and plastic sizing of steel structures, the latter widely used in Europe in order to be more economical, getting more advantage of the materials in the Serviceability Limit States. Based on this, this work makes a comparison of sizing steel structures based on NBR 8800:2008 and Eurocode 3. Phases of quantification of actions (including calculation of wind and snow), combinations, structural analysis, elastic sizing and verifications of the portico built in rolled metal profiles in full soul are demonstrated following the Eurocode 3, which has already been dimensioned according to NBR 8800:2008 in the Manual de Construção em Aço: Galpões para Usos Gerais, by Centro Brasileiro da Construção em Aço. Finally, it is concluded that the calculation result of solicitations is much higher using the Eurocode, but the resistant forces are also higher, obtaining similar results compared both standards in the Ultimate Limit States, even having different calculation methods. Greater emphasis is also observed by the NBR as the Serviceability Limit States, having displaceability limits stricter than European standards, this is a fact of great importance when dealing about the design of steel structures.