Experimental determination of Drucker-Prager yield criterion parameters for normal and high strength concretes under triaxial compression

•Triaxial compression tests were performed on NSC ad HSC for different lateral pressures.•Mohr circles were drawn by experimental data.•Cohesion and internal friction angles were obtained by using Mohr circles.•Drucker-Prager yield criterion parameters were determined.•Some equations were proposed to calculate the Drucker-Prager parameters by using concrete compressive strength. In this study, parameters which define Drucker-Prager yield criterion were investigated experimentally for both normal strength concrete (NSC) and high strength concrete (HSC) by triaxial compression tests. Total 16 concrete series with different concrete strength were produced. While 8 concrete series were produced as NSC (20MPa