Influência da adição de fibras de aço na tensão de aderência de barras de aço retilíneas
Carregando...
Data
2013-04
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Bonding between steel bars and concrete makes the two materials compatible, enabling the use of reinforced concrete as a construction material.
If the bond is good, there will be less cracks, and the reinforcing bar will be better protected by the surrounded concrete. The aim of this research
was to analyze the influence of steel fibers on concrete-steel bond strength. Therefore, pull-out tests were performed with thirty-three prismatic
specimens measuring 200 mm x 300 mm x 150 mm. The variables analyzed were: bar diameter (10 mm, 12.5 mm, 16 mm and 20 mm); bond
length (five and ten times the diameter); and the volume of steel fibers added to the concrete (1% and 2%). Short, steel, hooked fibers were used,
35 mm in length and with aspect ratio of 65. Based on the pull-out tests assays, the form and force of the rupture was determined in each specimen,
Computational simulations of the specimens were also performed with bars of 100 mm in diameter. Both the results of the experimental tests
and the modeling showed that the addition of fibers had little effect on the bond strength between the bar and the concrete. On the other hand,
when the bond rupture occurred by splitting of the concrete cover, the influence of the steel fibers was significant.
Descrição
Palavras-chave
Reinforced concrete, Concreto armado, Steel fibers, Bond, Fibras de aço, Aderência
Citação
ARAÚJO, D. L.; DANIN, A. R.; MELO, M. B.; RODRIGUES, P. F. Influência da adição de fibras de aço na tensão de aderência de barras de aço retilíneas. Revista IBRACON de Estruturas e Materiais, São Paulo, v. 6, n. 2, p. 307-338, abr. 2013.