Análise comparativa das deformações imediatas de lajes maciças em concreto armado com e sem abertura
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Data
2018-01-24
Autores
Orientador
Velho, Douglas Ferreira
Banca
Grala, Pedro
Mascolo, Rafael
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Baseado no crescimento da utilização do concreto armado na construção civil, se faz necessário manter, principalmente, a segurança para os usuários, sendo importante analisar corretamente todas as etapas estruturais de uma construção. Portanto, buscou-se apresentar uma análise comparativa das deformações imediatas das lajes maciças inteiriças e com abertura de 100x100cm em três posições diferentes. Esta análise tem como propósito demostrar a influência que a posição das aberturas executadas nas lajes possui na deformação imediata, tendo como base para este dimensionamento a NBR 6118:2014. As lajes analisadas possuem variados vãos e carregamentos, e para o seu dimensionamento foi utilizado o método de analogia de grelha com apoio rotulado indeslocável. Os resultados foram obtidos através de uma análise iterativa que utilizou uma planilha do Excel juntamente com um software computacional de elementos finitos, após os resultados foram comparados graficamente para melhor interpretação. Com este estudo comprovou-se que há variação na deformação das lajes, podendo ser observado que essa variação da deformação se altera conforme muda o carregamento e a posição da abertura na laje. Com os resultados, é possível nortear projetistas estruturais quando necessitarem executar aberturas em lajes maciças de concreto armado, para escolher a posição mais favorável.
Based on the growth of the use of reinforced concrete in the civil construction, it is necessary to maintain safety mainly for users, being important to analyze correctly all the structural steps of a construction. Therefore, it was sought to present a comparative analysis of the immediate displacements of the solid slabs without hole, with solid slabs with 100x100cm hole in three different positions. This analysis has as purpose demonstration the influence that the position of the holes executed in the slabs has in the immediate displacements, having as basis the dimensioning the NBR 6118: 2014. The analyzed slabs have different spans and loads, and for their design was used the method of grid analogy with indescribable labeled support. The results were obtained through an interactive analysis that used an Excel spreadsheet together with a finite element computational software, after the results they were compared graphically for better interpretation. With this study, it was verified that there is variation in the deformation of the slabs, being able to be observed that this variation of the displacements is adjusted to a change the loading and a hole position in the slab. With the results, is possible to help structural designers when necessary to perform holes in massive slabs of reinforced concrete to choose the most favorable position.
Based on the growth of the use of reinforced concrete in the civil construction, it is necessary to maintain safety mainly for users, being important to analyze correctly all the structural steps of a construction. Therefore, it was sought to present a comparative analysis of the immediate displacements of the solid slabs without hole, with solid slabs with 100x100cm hole in three different positions. This analysis has as purpose demonstration the influence that the position of the holes executed in the slabs has in the immediate displacements, having as basis the dimensioning the NBR 6118: 2014. The analyzed slabs have different spans and loads, and for their design was used the method of grid analogy with indescribable labeled support. The results were obtained through an interactive analysis that used an Excel spreadsheet together with a finite element computational software, after the results they were compared graphically for better interpretation. With this study, it was verified that there is variation in the deformation of the slabs, being able to be observed that this variation of the displacements is adjusted to a change the loading and a hole position in the slab. With the results, is possible to help structural designers when necessary to perform holes in massive slabs of reinforced concrete to choose the most favorable position.
Descrição
Palavras-chave
Lajes maciças; Concreto armado; Abertura; Deformação
Citação
PITOL, Alana Francischett. Análise comparativa das deformações imediatas de lajes maciças em concreto armado com e sem abertura. 2017. Monografia (Graduação em Engenharia Civil) – Universidade do Vale do Taquari - Univates, Lajeado, 13 dez. 2017. Disponível em: http://hdl.handle.net/10737/1916.