DECIV - Departamento de Engenharia Civil

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/496

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2004 - 20104

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Autor: search.filters.author.Freitas, Marcílio Sousa da RochaAssunto: search.filters.subject.Finite element analysis

Resultados da Pesquisa

Agora exibindo 1 - 4 de 4
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    Theoretical analysis of perforated rack columns.
    (2010) Sarmanho, Arlene Maria Cunha; Freitas, Marcílio Sousa da Rocha; Souza, Flávio Teixeira de
    Industrial Storage Systems are usually built with cold-formed profiles. Their sections, called “rack sections”, are specially designed with perforations to accommodate connections and bolts for easy assemblage. This, however, induces unexpected failure modes in other sections. The aim of this research was to analyze the effects of perforations on column behavior and resistance using the commercial software ANSYS and the finite element method. The numerical values for this procedure were previously obtained using the finite strip method and the generalized beam theory. These results were then calibrated by comparing them to the finite element models of columns without perforation. The element type, mesh refinement and boundary conditions were carefully chosen to ensure that the finite element model reproduces actual column behavior. The finite element model was used to evaluate the effects of perforation size, quantity and distribution on column behavior.
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    Análise teórico-experimental de elementos formados a frio perfurados submetidos à compressão.
    (2004) Sarmanho, Arlene Maria Cunha; Freitas, Marcílio Sousa da Rocha; Souza, Flávio Teixeira de
    Sistemas de armazenagem industrial são amplamente utilizados em todo o mundo, pois aliam praticidade e economia. Eles possuem diversas particularidades estruturais, entre elas a existência de perfurações ao longo da altura das colunas, para encaixe de outros elementos, o que dificulta a previsão de sua resistência, devendo esta ser feita, segundo associações de fabricantes, por meio de ensaios. Esse trabalho apresenta a utilização da simulação via elementos finitos para previsão da resistência dessas colunas e nele também são apresentadas alternativas aos ensaios experimentais.
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    Analysis of steel storage rack columns.
    (2005) Sarmanho, Arlene Maria Cunha; Freitas, Marcílio Sousa da Rocha; Souza, Flávio Teixeira de
    Storage rack systems are structures composed of cold-formed steel structural members that are used as columns, beams and bracing. The rack columns present peculiar features in their design because they have perforations to facilitate assemblage of the system, which makes them more difficult to analyze by cold-formed steel structures design codes. There are several design codes proposed by the manufacturers associations, as the specifications of Rack Manufacturers Institute (RMI), applied in the USA along with the specification of the American Iron and Steel Institute (AISI). These codes propose experimental stub columns tests for the determination of their resistance. In this work, the commercial software, ANSYS, is used for material and geometric nonlinear analysis of these columns, and the results are compared with experimental data obtained by stub column tests, for a typical section of racks manufactured in Brazil.
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    Analysis and behavior of steel storage drive-in racks.
    (2010) Sarmanho, Arlene Maria Cunha; Souza, Flávio Teixeira de; Freitas, Marcílio Sousa da Rocha
    This work presents a general analysis of drive-in racks, evaluating the influence of each of their components on global stability. In this study, a full-scale test of a drive-in system was carried out. Finite element models were also developed to evaluate global structural stability and component influence on system behavior. The experimental and numerical results show that the connections and base plates have the most significant influence on the system’s behavior. This influence is analyzed, an equation that predicts base plate resistance is then proposed, and its results are compared with experimental and numerical results.