Resumo: Apresenta-se neste trabalho a formulação energética para o estudo de barras de seção delgada aberta com influência de vinculação elástica contínua ou discreta. A utilização do método dos elementos finitos levou à elaboração de um programa computacional que permite o estudo das barras para diversas condições de carregamento, vinculação e forma de aplicação da vinculação elástica. Tem-se a possibilidade de determinar cargas críticas com seus modos de flambagem, no caso de problemas de 1.1 Ver menos

rdem. Utiliza-se o método da iteração vetorial clássica para determinar, nas barras em estudo, os menores auto-valores (cargas críticas) com seus respectivos auto-vetores (modos de flambagem), inclusiveno cálculo de auto-valores seguintes ao primeiro. Exemplos mostram claramente situações de carregamento e vinculação elástica, e seus efeitos no comportamento da barra Ver menos

Abstract: Thin walled open beams with open cross sections are studied taking into account the influence of continuous and/or discrete elastic supports. The finite element method was used in the development of a computer code which allows the stability analysis for different loadings and rigid or elastic supports. Critical loads and corresponding buckling modes, displacements and forces maybe computed in problems with geometric non-linearities. The classical vetorial iteration method is used to determine the least eigenvalues (criticalloads) and corresponding eigenvectors (buckling modes). The other eigenvalues and eigenvectors may also be obtained. Examples are presented for models with different loading and support conditions, discussing the effects on the beams behaviour Ver menos

Abstract: Thin walled open beams with open cross sections are studied taking into account the influence of continuous and/or discrete elastic supports. The finite element method was used in the development of a computer code which allows the stability analysis for different loadings and rigid or elastic supports. Critical loads and corresponding buckling modes, displacements and forces maybe computed in problems with geometric non-linearities. The classical vetorial iteration method is used to determine the least eigenvalues (criticalloads) and corresponding eigenvectors (buckling modes). The other eigenvalues and eigenvectors may also be obtained. Examples are presented for models with different loading and support conditions, discussing the effects on the beams behaviour Ver menos