Este trabalho tem o objetivo de analisar teórica e experimentalmente o comportamento de consolos de concreto armado. Para tal, foi realizada uma revisão bibliográfica buscando os artigos mais recentes e as principais normas que tratam deste assunto. Foram analisados mais de trezentos consolos encontrados na literatura, nesta análise, as forcas de ruína experimentais foram comparadas com as forcas de ruínas calculadas segundo as normas ACI-3118M-89, CAN3-A23.3-M-84 e NBR-9062/85. Para complementar este estudo, foram ensaiados oito consolos de concreto de alta resistência, os quais apresentavam as mesmas dimensões, a mesma armadura principal e diferentes taxas de armadura de costura. A resistência do concreto variou de 50 MPa a 80 MPa. Estes consolos tiveram suas forcas de ruína comparadas com as previstas pelas normas já citadas. Além disso, foram analisadas as deformações na armadura, medidas a cada nível de carregamento, e o ângulo de inclinação das tensões principais, medidos no centro geométrico da provável biela comprimida. De acordo com as analises realizadas, pode-se observar que o uso de concreto de alto desempenho na confecção de consolos de concreto de resistência convencional. O dimensionamento de consolos segundo as normas citadas foi bastante satisfatório. Entretanto, no calculo da força de ruína das pecas ensaiadas por outros pesquisadores, os resultados não foram tão satisfatórios, pois estes consolos analisados bem sempre apresentavam o detalhamento conforme recomendam estas normas.

The aim of this work is to analyze theoretically and experimentally the behavior of reinforced concrete corbels. A bibliographic review was done, researching for the most papers and the main codes concerning to this subject. It was analyzed more than hundred corbels found in the literature. In this analysis the experimental failures forces were compared to the failure forces calculated by the followings codes: ACI-3118M-89, CAN3-A23.3-M-84 and NBR-9062/85. To complement this work, eight corbels of high-strength concrete were made with the same dimensions, the same main reinforcement and different rates of secondary reinforcement. The strength of the concrete ranged from 50 MPa to 80 MPa. These corbels had their forces compared with the failure forces postulated by the codes. It was also evaluated the deformations of the reinforcement considered in each level of loading, and the angle of inclination of the main stresses measured in the geometric center of probable compressed diagonal. By this analysis, it was observed that the use of high-strength concrete in the construction of corbels is quietly efficient. Although, it is necessary the use of proper reinforcement ratios, that are basically the same indicated for corbels with low-strength concrete. The design of corbels by the cited codes was quietly satisfactory. The probable reason was that the corbels did not present the reinforcement details recommended by these codes.