Análise da estabilidade de estruturas metálicas: aplicação do MAES no dimensionamento de colunas

Abstract

The steel structures have advantages over reinforced concrete, the demand for steel solutions has been increasing in Brazil, especially in the execution of works that require high technical standard, execution speed or singular architecture. The present work aims to study stability of steel structures, the factors that influence it and the different methods of analysis. To reach the goals, a second order elastic analysis was done for a system classified as rigid steel gantry. It was done using the methodology suggested by the norm. The efforts amplification method (Método da Amplificação dos Esforços Solicitantes -MAES) uses coefficients B1 and B2 to simulate the geometric non-linearity and proposes to evaluate the behavior approximately. The relation of results obtained by different analyzes was also discussed, regarding the force x displacement behavior and the bending moments. In the compressed columns, the analysis of the analyzed gantry showed predominantly ultimate stresses (σu) that correspond to the linear elastic regime. That pointed out, in general, the analysis by the amplification of the requesting efforts (MAES) provides results consistent with most accurate method.