Confined concrete with variable crack angle – Part II: shear friction model Available to Purchase

This study investigates shear transfer across a definite plane, which must be considered in the formation of the crack opening path as discussed in the companion paper, Part I. Experimental investigation of the shear friction coefficient for a wide density range of 1200–2259 kg/m³ for normal and lightweight concrete is presented for determination of parameters for the analytical model discussed in Part I, which explains the behaviour of confined concrete. The specimen variables include concrete strength, unit weight, volume percentage of air in the matrix (A/M), and volume percentage of matrix in the concrete (M/T). Test results show that the friction coefficient is dependent on concrete strength. However, shear strength is weakly dependent on the volume percentage of matrix in the concrete and strongly dependent on the volume of air in the matrix.