Estudo da flambagem para perfis estruturais usando a análise analítica e o métodos de elementos finitos

Abstract

This work presents a theoretical-conceptual approach to study different types of beams on the effect of global buckling on a purely compressive load, taking into account structural calculations within the elastic regime of the material and by computational simulation. The study is based mainly on the Brazilian standard NBR 8800: 2008, which aims to verify the resistant application of each bar for different structural forms, to obtain the critical forces of buckling by bending, twisting and union of boths and the permissible tensions, in order to be possible finding of the preferred mode of buckling that each beam will possess. Analyzing by the Finite Element Method (FEM) and checking the buckling modes through Ansys Inc. software and loads that initiate structural buckling instability. In the results it is seen that for short bars an expected behavior is more acceptable than for long bars. These results are discussed by the fact that a simple method is used in the work, not analyzing the variation of the elastic tension of the material.