Cold Formed Steel Members
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. Sobre a estabilidade de cantoneiras de aço formadas a frio submetidas à compressão / On the stability of cold-formed steel angles under compression
Apparently, the structural analysis of a simple angle under compression is an elementary problem, therefore, already largely known. However, cold-formed steel angles, mostly with slender legs, present two critical buckling modes: (i) global-flexural mode, in cases of high length members, (ii) and a coincident local-plate/global-torsional-flexural mode, which
Publicado em: 2008
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14. Numerical analysis of compressed cold formed steel members considering initial geometric imperfections / Análise numérica de perfis de aço formados a frio comprimidos considerando imperfeições geométricas iniciais
The work presents a numerical analysis on cold-formed steel members compressed between pinned ends. One is about an inquiry carried through in finite elements in which it was studied the influence of initial geometric imperfections, existing in plain channels and lipped channels, under the aspects of its form, magnitude and signal. The geometric imperfection
Publicado em: 2007
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15. Análise teórica e experimental de conectores de cisalhamento e vigas mistas constituídas por perfis de aço formados a frio e laje de vigotas pré-moldadas / Theoretical and experimental analysis of shear connectors and composite beams constituted of cold-formed steel beams and floor system with lattice girder beams
In Brazil, the lack of hot-rolled members and high cost of welded steel beams have increased the use of composite beams made of cold-formed steel beams and floor system with lattice girder beams, whose structural behavior is not perfectly understood. Although this system is similar to the one composed of hot-rolled steel beams and concrete slabs, it is impor
Publicado em: 2007
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16. Theoretical and experimental analysis of cold-formed steel members under compression / Análise teórica e experimental de perfis de aço formados a frio submetidos à compressão
Cold-formed steel members present, in general, higher local slenderness than classical hot- rolled ones, which make them more prone to local buckling. Besides, thin-walled open sections have small torsional stiffness, and hence global torsional and flexural-torsional instability modes are many times more critical than global flexural ones. Also, distortional
Publicado em: 2006
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17. Analyzes of the numerical answer of the bolted connections of cold-formed steel members / Análise da resposta numérica de ligações parafusadas em chapas finas e perfis formados a frio
A utilização de perfis formados a frio na construção metálica no Brasil vem crescendo de forma significativa. Dentro deste mesmo contexto, atenções especiais estão sendo direcionadas às ligações utilizadas neste tipo de perfil, pelo fato de as chapas que as constituem resultarem cada vez mais esbeltas em função da significativa redução na sua
Publicado em: 2005
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18. Análise teórico-experimental de sistemas aporticados com elementos perfurados em perfis formados a frio - Racks
Industrial Storage Racks are used in warehouses, because they improve the space occupation, and let easy access to the products. They are built with cold formed profiles, and presents the instability phenomena like local and distortional modes, common in thin-walled members. The uprights of these structures shows holes to make easy the assemblage. There are
Publicado em: 2005
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19. Distortional buckling of cold-formed steel members under compression and bending. / Flambagem por distorção da seção transversal em perfis de aço formados a frio submetidos à compressão centrada e à flexão"
Os perfis de aço formados a frio apresentam, em geral, elevada relação largura/espessura, tornando-os suscetíveis à flambagem local, caracterizada por uma flambagem de chapa, mas que também pode ocasionar um outro modo de flambagem, denominado flambagem por distorção, desconsiderado no dimensionamento de perfis laminados, mas que pode resultar críti
Publicado em: 2003