Simulação numérica do comportamento estrutural de vigas casteladas de aço com ênfase na flambagem do montante de alma.

• Autor(a) principal: Vieira, Washington Batista
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3744
• topic: Modelagem numérica; Flambagem do montante de alma; Vigas casteladas; Numerical modeling; Buckling of the amount of soul; Beams castles; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::ESTRUTURAS METALICAS

With the start of production of hot-rolled structural I shapes in Brazil, since 2002 there has been a growing interest in Brazilian industry by castellated beams in the segment of steel structures. The castellated beams are made expanding the web of rolled I or H steel sections, so that the beam has greater stifiness keeping the same mass as the original profile. This work presents a study of the behavior of castellated steel beams, with emphasis on the web post instability, performed by means of numerical models using the Finite Element Method. For the numerical analysis, the beams were analyzed using the ABAQUS software, considering the elastoplastic behavior of the material and geometric nonlinearity of the structure. The numerical results show excellent agreement with experimental results available in literature. Using the numerical models developed,a parametric study was performed that allowed to evaluate the influence of several variables on the web post instability for castellated beams. Were modeled mainly beams with slender web and could be seen that for long spans - which is usual for steel beams - there is low probability of buckling of the web posts, and when it occurs, inelastic buckling occurs in most cases.