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Shear strength of reinforced concrete circular cross section beams.
| Revista IBRACON de Estruturas e Materiais
Shear strength of reinforced concrete circular cross section beams.
Pedro Wellington G. N. Teixeira
Carlos Eduardo Moreira Maffei
Maria Cecília Guazzelli
Resumo
A proposed adequation of NBR 6118, Item 7.4, related to shear strength of reinforced concrete beams is presented with aims to application on circular cross-section. The actual expressions are most suitable to rectangular cross-section and some misleading occurs when applied to circular sections at determination of VRd2, Vc and Vsw, as consequence of bw (beam width) and d (effective depth) definitions as well as the real effectiveness of circular stirrups. The proposed adequations are based on extensive bibliographic review and practical experience with a great number of infrastructure elements, such as anchored retaining pile walls, where the use of circular reinforced concrete members are frequent.
