%0 Journal Article %T Shear strength of reinforced concrete circular cross-section beams %A Teixeira %A P. W. G. N. %A Maffei %A C. E. M. %A Guazzelli %A M. C. %J Revista IBRACON de Estruturas e Materiais %D 2012 %I Scientific Electronic Library Online %R 10.1590/S1983-41952012000600004 %X 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 adequation is 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 is frequent. %K shear %K reinforced concrete %K circular section %K retaining walls. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1983-41952012000600004&lng=en&nrm=iso&tlng=en