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| 5.3 MB | Adobe PDF |
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Abstract(s)
Para efeitos arquitetônicos têm-se removido as vigas das lajes, sendo então chamadas de lajes planas. Mesmo dando uma melhor estética para a laje, existem desvantagens na sua implementação, como por exemplo, a concentração de tensões cisalhantes atuantes em torno dos pilares junto a estas lajes, magnificando o efeito de punção. Em situações especiais, pode ocorrer um colapso progressivo da laje. As normas NBR 6118 (2014) e Eurocódigo 2 (EN 1992-1-1; 2010) trazem modelos de cálculo e diretrizes para calcular as armaduras e verificar a segurança para esse tipo de situação. Nesta dissertação, estas normas foram utilizadas para nortear o projeto inspirado no estudo de caso do estacionamento Pipers Row, onde houve colapso da laje em torno de um pilar do quarto andar devido ao efeito de punção, ocasionando um colapso progressivo da estrutura. A partir dos resultados obtidos, foi feita uma comparação entre as normas, mostrando as distintas metodologias utilizadas
For architectural effects, the beams have been removed of the slabs, then been known as flat plates. Despite the better esthetics of the slabs, there are disadvantages in your implementation as, for example, the concentration of shear tensions acting around the columns along the slabs, magnifying the punching shear effects. In especial occasions, can happen also a progressive collapse of the slab. The standards NBR 6118 (2014) and Eurocode 2 (EN 1992-1-1; 2010) bring calculation models and guidelines to calculate the armors and to verify the safety for this type of situation. In the dissertation, the standards were utilized to guide the project inspired in the case study of the parking Pipers Row, where there was a collapse of the slab around one column of the fourth floor due to the puncture effect, causing a progressive collapse of the structure. From the results obtained, it was made a comparison between the standards, demonstrating the different methodologies used.
For architectural effects, the beams have been removed of the slabs, then been known as flat plates. Despite the better esthetics of the slabs, there are disadvantages in your implementation as, for example, the concentration of shear tensions acting around the columns along the slabs, magnifying the punching shear effects. In especial occasions, can happen also a progressive collapse of the slab. The standards NBR 6118 (2014) and Eurocode 2 (EN 1992-1-1; 2010) bring calculation models and guidelines to calculate the armors and to verify the safety for this type of situation. In the dissertation, the standards were utilized to guide the project inspired in the case study of the parking Pipers Row, where there was a collapse of the slab around one column of the fourth floor due to the puncture effect, causing a progressive collapse of the structure. From the results obtained, it was made a comparison between the standards, demonstrating the different methodologies used.
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Keywords
Punção Puncionamento Concreto armado Lajes planas Norma brasileira Norma europeia Eurocódigo Puncture PuncFlat plateshing Reinforced concrete Brazilian standard Eurocode European standard