Structural Instability
Mostrando 25-36 de 177 artigos, teses e dissertações.
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25. Simulation, analysis and computational characterization of fingering patterns in fluids displacement on porous media. / Simulação, análise e caracterização computacional de padrões de fingering em deslocamentos de fluidos em meios porosos
In this work, the patterns related to the displacement process of an interface between two ftuids of different mobilities are studied computationally. In the literature, the formation process of these patterns is known as fingering, a type of dynamic instability in the interface between two miscible fluids, where the fingers are classified in two types: dens
Publicado em: 2009
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26. Avaliação da rigidez de pórticos tridimensionais de concreto armado / Evaluation of stiffness in three-dimensional frames of reinforced concrete
An evaluation of stiffness in three-dimensional frames is important to ensure safety in structural projects, especially in tall buildings, where both ultimate limit state and serviceability limit state have to be considered. In reinforced concrete buildings, this evaluation is calculated through an analysis of global stability, either through approximate met
Publicado em: 2009
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27. Comportamento à fratura de defeitos circunferenciais em dutos submarinos instalados por bobinamento
This study aims to evaluate the limit of the fracture instability for submarine pipelines installed by the Reeling Method, determining the maximum allowable ductile tearing for use in analysis of structural integrity through correlations with SENT specimens (Single Edge Notched Tension). The Standard DNV-RP-F108, which gives guidance to testing and analysis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2009
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28. Quando a dança é o jogo e o intérprete é jogador: do corpo ao jogo, do jogo à cena.
This investigation has as its object creation in dance founded in elementary principles of gameplaying. I have taken as hypothesis the idea that the concept of game can be applied in the practice of scene creation not only as a resource in the generation of creative material (improvisation), but also incorporated as a driving mechanism and structural element
Publicado em: 2009
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29. AvaliaÃÃo de aberraÃÃes cromossÃmicas em bovinos (Bos taurus taurus) infectados pelo papilomavÃrus bovino
Bovine papillomavirus (BPV) is represented by 10 papillomavirus subtypes, epiteliotropic or mucosotropic, which are transmitted among bovines through contaminated blood and ephitelial contact. This virus may be in a latent form on host lymphocytes, triggering chromosomal instabilities. In this context, this study aimed to evaluate chromosomal aberrations whi
Publicado em: 2009
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30. Organizações não-governamentais ONGs: trajetórias, concepções e práticas em educação popular
The present study has as objective central office to analyze where measured the Organizations Not-Governmental - identified ONGs as progressive in the scope of the popular education, represented here for ONGs SEDUP (Serviço de Educação Popular) and ASD (Associação Santo Dias), contributes with the hegemony of the subordinate class. The choice of these e
Publicado em: 2009
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31. As diferentes concepções da dinâmica macroeconômica: uma abordagem epistemológica
Apesar de ter quase um século de idade, a teoria do caos ainda é uma idéia recente no meio científico de modo geral, e demonstra claramente um forte poder de análise matemática dos fenômenos reais, embora seus estudos ainda se encontram na fronteira de pesquisas por todo o mundo. Pode-se dizer que, se a teoria neoclássica emprega a matemática algéb
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/06/2008
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32. FINITE ELEMENTS WITH SPLINE FUNCTIONS APPLIED TO STRUCTURAL DYNAMICS AND INSTABILITY / ELEMENTOS FINITOS COM FUNÇÕES SPLINE PARA INSTABILIDADE E DINÂMICA DE ESTRUTURAS
The present work presents a subparametric finite element model with spline displacement functions, implemented for static, dynamic and instability analysis of folded plates, thin-walled beams, box girders, and elongated structures such as bridges and structural shapes. A drilling degree of freedom (rotation about an axis perpendicular to the plane of the ele
Publicado em: 2008
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33. Numerical and analytical study for the determination in natural fire situation of the critical load on steel beams under concentrated load / Estudo numérico e analítico para determinação em situação de incêncio natural da carga crítica de vigas de aço com carga concentrada
Fire over a structural system is considered an accidental load and can generate structural collapses. The catastrophic effects of a fire on a structural system should always be avoided with preemptive actions. Therefore, it is essential to have the appropriate knowledge of the structure behavior under fire and to take appropriate actions to avoid its collaps
Publicado em: 2008
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34. Ecodinâmica coastal dunes of Sergipe / Ecodinâmica das dunas costeiras de Sergipe
The ecodynamics analysis of coastal dunes of Sergipe determined the role and the interactive effect of the anthropic action and of the natural dynamics in the occured fast ambient changes in two sample units of the Northern and Southern Coastline from Sergipe. The present research searched the detailing of the existing ambient dynamics in the fields of the d
Publicado em: 2008
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35. Ecodinâmica coastal dunes of Sergipe / Ecodinâmica das dunas costeiras de Sergipe
The ecodynamics analysis of coastal dunes of Sergipe determined the role and the interactive effect of the anthropic action and of the natural dynamics in the occured fast ambient changes in two sample units of the Northern and Southern Coastline from Sergipe. The present research searched the detailing of the existing ambient dynamics in the fields of the d
Publicado em: 2008
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36. Pesquisadores, populações locais e áreas protegidas: entre a instabilidade dos lados e a multiplicidade estrutural das posições / Distinctions and similarities among researchers working on protected areas and local populations: multiplicity of "sides" and structural instability of "stands".
A relação entre populações locais e áreas protegidas é tema hoje extremamente controvertido no âmbito científico, mobilizando a atenção de cientistas interessados tanto em pesquisar questões específicas como em interferir em políticas públicas a ele direcionadas. Se há um consenso entre especialistas, é que estamos diante de um contexto discu
Publicado em: 2008