Estudo da interação entre grupos de paredes na distribuição das cargas verticais em edifícios de alvenaria estrutural

• Autor(a) principal: Barbosa, Matheus Pereira
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/40636
• topic: alvenaria estrutural; modelagem computacional; grupo de paredes; lintel.

One of the main characteristics of the project of structural masonry buildings consists in the fact that the vertical loads act on the walls following a uniform distribution. It is widely known in the scientific technical knowledge that the consideration of direct lashing, by means of interlocking between wall blocks, leads to lower currents of normal vertical stresses in the give group of walls. In this specific case, many researchers have been dedicated to the study of these lashings, in order to verify their resistant capacity, with the use of computational modelling and also conducting experiments in laboratory, in order to ensure consistent limits for shear stresses at the connections between the walls. In the majority cases, the groups of walls can be defined/delimited by the door and window openings, and therefore, the study is restricted to the distribution of vertical loads in each group individually. Though this procedure is established by the scientific and technical means, the existence of masonry elements over the openings, especially the windows openings, might induce changes in this behavior by the interaction between groups of wall. This aspect of behavior of structural masonry is still under explored by researchers, as a consequence consists an opportunity for develop of new researches. Therefore, the study presented developed a systematic analysis for the consideration of lintels of masonry in the modeling of panels in order to evaluate its influence on the distribution of vertical loads of the building. Numerical simulations were performed using the equivalent gantry model developed by Nascimento Neto et al (2014) and models based on finite elements of shell. The analysis realized consist of verifying the redistribution of normal vertical stress in the wall groups and in the evaluation of strain active on the connection lintels. The obtained results indicate that reducing the intensity of strain in the most requested is not a behavior trend, because in some cases this reduction has not been shown significantly, therefore should not be considered in project of buildings.