Comparison between concrete stress diagrams according to the Brazilian standard ABNT NBR 6118: 2014

Authors

  • Victor Hugo Dalosto de Oliveira Department of Civil and Environmental Engineering, University of Brasília, SG-12, Campus Darcy Ribeiro, Asa Norte, Brasília, DF, 70910-900, Brazil
  • Rodolfo Alves Carvalho Department of Civil and Environmental Engineering, University of Brasília, SG-12, Campus Darcy Ribeiro, Asa Norte, Brasília, DF, 70910-900, Brazil
  • Luana Ferreira Borges Department of Civil and Environmental Engineering, University of Brasília, SG-12, Campus Darcy Ribeiro, Asa Norte, Brasília, DF, 70910-900, Brazil
  • Paulo Chaves de Rezende Martins Department of Civil and Environmental Engineering, University of Brasília, SG-12, Campus Darcy Ribeiro, Asa Norte, Brasília, DF, 70910-900, Brazil
  • Rodolfo Rabelo Neves Department of Materials Engineering and Construction, Federal University of Minas Gerais, Av. Antøˆnio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
  • João Paulo de Almeida Siqueira Department of Civil and Environmental Engineering, University of Brasília, SG-12, Campus Darcy Ribeiro, Asa Norte, Brasília, DF, 70910-900, Brazil
  • Gabriel Yves da Silva Oliveira School of Exact, Architecture and Environment, Catholic University of Brasília, QS 07 - Lote 01, Taguatinga, Brasília, DF, 71966-700, Brazil
  • Cintia Adriana Azevedo de Liz Anhaia Department of Civil Engineering, Faculty of Pinhais, Av. Camilo di Lellis, 1065, Centro, Pinhais, PR, 83323-000, Brazil

DOI:

https://doi.org/10.14311/APP.2022.33.0424

Keywords:

concrete behavior, parabola-rectangle diagram, rectangular block

Abstract

This study aims to compare methods for the determination of concrete properties by means of the stress diagrams present in the Brazilian standard ABNT NBR 6118: 2014. The area under the stress diagram, the internal reactions, and the application point of the resulting reactions for the parabola-rectangle and rectangular block diagrams are present in order to compare them. Deductions and numerical examples were used, and different results were obtained for each formulation. This is due to non-consideration of the relationship between stress and strain in the simplified rectangular block. The rectangular block is applicable only for cases in which the concrete reaches the ultimate strain. These cases are those that concrete crushing determines the section failure in compression with steel yielding in tension (domain 3) or without steel yielding (domain 4).

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Published

2022-03-03

How to Cite

Oliveira, V. H. D. de ., Carvalho, R. A. ., Borges, L. F. ., Martins, P. C. de R. ., Neves, R. R. ., Siqueira, J. P. de A. ., Oliveira, G. Y. da S. ., & Anhaia, C. A. A. de L. . (2022). Comparison between concrete stress diagrams according to the Brazilian standard ABNT NBR 6118: 2014. Acta Polytechnica CTU Proceedings, 33, 424–430. https://doi.org/10.14311/APP.2022.33.0424