Confinamento dado por lajes e vigas melhorando a resistência do pilar que as cruza. / Confinement given for slabs and beams improving the strength of the column that crosses them.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The goal of this paper is to study the effect of the confinement in connections of concrete columns having certain strength with lower strength concrete slabs or beams. It was intended to develop a better understanding of this subject, still little explored, to evaluate some code recommendations and, where necessary and possible, to suggest a alternative solution. Twenty-two specimens of reduced models were tested in compression representing corner or internal columns, incorporating part of the slabs, and isolated columns. These results were compared with recommendations of codes, ACI- 318, CSA 23,3 and researchers as, Gamble and Klinar, Ospina and Alexander, Bianchini and Silveira dos Santos. Indeed, this research is a continuation of that one carried through by Silveira dos Santos. Complementing the experimental studies, finite elements models made possible the best understanding of this effect and still they had made possible the comparison of the experimental results with the confinement criterion suggested for CM CEB-FIP and Eurocode EC2. It had concluded that only for internal columns, surrounded by slab, there is a strength increase of the specimen caused by confinement of the slabs concrete respecting certain limits. For corner columns its necessary the utilization of some element that compensates the missing concrete, for example, a transversal reinforcement.

ASSUNTO(S)

pilares concrete experimental analysis of structures concreto columns análise experimental de estruturas

ACESSO AO ARTIGO

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