Prestressing Structures
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Reinforced concrete corbels strengthened with external prestressing
Resumo As estruturas em concreto podem exigir, ao longo de sua vida útil, o aumento da capacidade de carga devido a eventuais mudanças de utilização. Nesse contexto, os consolos podem ser considerados elementos estruturais que apresentam grandes desafios para a instalação de alternativas de reforço. Tal dificuldade é decorrente do fato de que a capac
Rev. IBRACON Estrut. Mater.. Publicado em: 23/09/2019
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2. Análise tipológica de elementos e sistemas construtivos pré-moldados de concreto do ponto de vista de sensibilidade a vibrações em serviço / Typological analysis of precast concrete elements and building systems in terms of sensitivity to vibration in service
In the context of construction modernization, the application of precast concrete elements offers a good and reliable alternative in the construction strategy, among them large spans, fast assembly, lightweightness and excellent structural members quality. Dealing about dynamic behavior of concrete structures, precast elements are subjected to several loadin
Publicado em: 2010
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3. Structural behavior of extradosed bridges. / Comportamento estrutural de pontes com protensão no extradorso.
In recent years, external prestressing applied to structures of bridges has experienced exceptional development, permitting a greater freedom in design and, consequently, the appearance of new structural typologies. An exemple of such development is the extradosed bridge, a concept that begins to spread in technical media as a low cost transition between pre
Publicado em: 2006
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4. Análise de estruturas de concreto sob o efeito do tempo: uma abordagem consistente com consideração da viscoelasticidade, da plasticidade, da fissuração, da protensão e de etapas construtivas. / Concrete structures analysis under the time effects: an efficient and accurate approach qhich takes into account the viscoelasticity, the plasticity, the cracking, the prestressing and constructions by stages.
Apresenta-se neste trabalho uma metodologia consistente e eficiente para análise de estruturas de concreto sob o efeito do tempo. A metodologia exposta é baseada no Método dos Elementos Finitos (MEF). É mostrado como se analisar estruturas de concreto através do MEF, considerando na equação constitutiva dos elementos, os fenômenos viscoelásticos. A
Publicado em: 2006
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5. A protensão como um conjunto de cargas concentradas equivalentes. / Prestressing as equivalent concentrated loads group.
This work is a study about the representation of the prestressing through a CELG (Concentrated Equivalent Loads Group) in order to determine the internal forces and displacements in prestressed structures, due to prestressing. This study considers the concept of prestressing, deviation forces and immediate loss of prestressing. Furthermore some alternative m
Publicado em: 2005
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6. Estudo das estruturas de membrana: uma abordagem integrada do sistema construtivo, do processo de projetar e dos métodos de análise / Study of membrane structures: an integrated approach of the constructive system, design process and analysis methods
Membrane structures used in roofs are constructive systems formed mainly by structural membrane, which has also the function of sealing. Structural membranes are flexible sheets that resist to external loads due to their form, to their physical characteristics and to their pre-stressing. The pre-stressing of the membrane can be achieved either through its st
Publicado em: 2001
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7. ANÁLISE DO COMPORTAMENTO À FLEXÃO DE VIGAS PROTENDIDAS COM CABOS EXTERNOS SINTÉTICOS / ANÁLISIS DEL COMPORTAMIENTO A LA FLEXIÓN DE VIGAS PROTENDIDAS CON CABLES EXTERNOS SINTÉTICOS / ANALYSIS OF THE FLEXURAL BEHAVIOR OF BEAMS PRESTRESSED WITH EXTERNAL TENDONS
Beams prestressed with external tendons have a number of attractions for engineers. They allow a reduction in weight, since concrete is not provided merely to act as cover to tendon or duct; they allow the tendons to be inspected for signs of corrosion and tendons can be replaced or retensioned if necessary. External prestressing is also an ideal application
Publicado em: 1999
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8. Contribuição ao estudo das coberturas penseis
This work presents a finite element approach to static and dynamic analysis of counterstressed cable structures. Two nodes, constant strain finite elements are used to model hanging cables, plane prestressed cable trusses and 3-D prestressed cable networks. The two nodes elements are assembled with tniss, beam and frame elements to the static analysis or mix
Publicado em: 1991