Analysis of compression zone parameters of cross-section in flexural reinforced concrete members according to EC2 and STR 2.05.05

Abstract

Coefficients for rectangular stress diagram used in various regulations and methods are analyzed. These coefficients are compared with experimental data presented by other authors. It was revealed that theoretical and experimental values of some coefficients for rectangular stress diagram when concrete classes are high are less than possible minimum values obtained using triangular stress diagram. The limit compression zone depth value according to STR 2.05.05:2005 and according to hypothesis of plane sections was analyzed as well. It was determined that the depth of these diagrams differs quite substantially.