Ensaios em vigas de alvenaria submetidas à flexão simples
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Data
2018-06
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Editor
Ricardo Prado Abreu Reis
Resumo
An experimental study of the flexural behavior of concrete masonry beams subjected to flexure was done and the variables used were the height of the cross section and the distribution of the longitudinal reinforcement along the layers of blocks. Nine concrete masonry beams were cast and tested with concrete blocks of 13 MPa compressive strength. The height of the cross section was defined by the number of blocks: one, two or three layers. The steel longitudinal reinforcement was distributed along the cross section, such that the steel arrangement gave the same steel reinforcing ratio for all beams. Three beams with lintels only and without stirrups were cast since its use if very common in the region of Goiania, GO. Results obtained were compared to those values obtained using recommendations prescribed in Brazilian code of practice NBR 15961-1 (2011). In general, beams with stirrups and with longitudinal reinforcement distributed along the height of the cross section had better performance, were more ductile and safer than beams without stirrups. These beams failed in flexure and ultimate loads were above those calculated using code recommendations. Beams without stirrups had a shear failure with ultimate loads lower than recommended by the code. This study shows that beams without stirrups should not be used.
Descrição
Palavras-chave
Ensaios, Vigas, Alvenaria estrutura, Flexão simples, Cisalhamento, Tests, Beams, Structural masonry, Flexure, Shear
Citação
OLIVEIRA, Maria das Graças Duarte de; BACARJI, Edgar; GUIMARÃES, Gilson Natal. Ensaios em vigas de alvenaria submetidas à flexão simples. Revista Eletrônica de Engenharia Civil, Goiânia, v. 14, n. 1, p. 1-15, jan./jun. 2018. Disponível em: <https://www.revistas.ufg.br/reec/article/view/45590/pdf>.