Reverse cyclic tests on high performance cement concrete shear walls with barbells

Abstract

Behaviour of reinforced conventional concrete (CC) and reinforced high performance cement concrete (HPC) squat and slender shear walls with barbells are investigated. The aspect ratios selected for the shear walls were 1 and 2.75. The specimens were subjected to quasi-static lateral reverse cyclic loading until failure.The grade of concrete used was M60. The mix proportion of conventional concrete (CC) was obtained as per ACI 211.4. In order to obtain a mix proportion for high performance concrete (HPC), the guidelines given by Aitcin which is a modified version of ACI 211.1 was used. The values of longitudinal and transverse reinforcement ratio used in the wallswere 0.57 and 0.18 %, respectively for squat shear walls and 0.47 and 0.63 %, respectively for slender shear walls. The observed failure mode in squat shear wall was by shear and in slender shear wall, it was by flexure. The performance based parameters such as strength, stiffness degradation, energy dissipation capacity and ductility were obtained and the results are presented.