Affiliation:
1. Universidade Estadual de Campinas
2. Universidade Federal do ABC, ,
Abstract
This paper focuses on the assessment of the shear strength prediction established in the brazilian concrete code, NBR6118/2007[1], for reinforced concrete beams without web reinforcement. The values obtained by using the brazilian code equation are compared with a significant number of available experimental data and with those predicted by the expressions of other national and international codes, such as CEB-FIP MC90[2] and ACI-318/11[3]. The brazilian concrete code regarding shear capacity of reinforced concrete elements are explicitly assumed to be valid only for concrete strengths up to 50 MPa. It is shown that the code equation may be unconservative in a large number of cases. This discrepancy increases with increasing concrete strength, decreasing longitudinal reinforcement ratio and increasing beam depth.
Publisher
Trans Tech Publications, Ltd.
Reference12 articles.
1. NBR 6118-03, Design of Concrete Structures, Rio de Janeiro, Brazil, 2007, 170 pp.
2. CEB/FIP Model Code MC-90 – Design code", Bulletin d, Information no 213-214, Comité Euro-International du Béton, May (1993).
3. ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary, American Concrete Institute, Farmington Hills, MI, (2011).
4. Canadian Standard CAN A23. 3-04 – Design of concrete structures, Canadian Standards Association, Dec. (2004).
5. Elzanaty, A.H.; Nilson, A.H. and Slate, F.O. (1986) Shear capacity of reinforced concrete beams using high-strength concrete, ACI J., Vol. 83(2), 290-296.
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