Analytical Performance Investigation of Post-Tensioned Concrete Shear Wall

Abstract

This paper introduces a novel approach in building a hybrid type of shear wall- A combination of
conventional reinforced concrete shear wall and a vertical unbonded posttensioning which provides a desirable
selfcentering of shear wall and reduced rebar congestion in wall with considerable amount of energy dissipation through
yielding of mild steel. In opposed to behaviour of cast in place reinforced concrete shear wall, which produces
permanent interstorey drift after seismic event. To study the performance of cast in place unbonded posttensioned shear
wall a finite element modelling done using SAP2000 program. First model was of conventional cast in place reinforced
concrete shear wall with typical reinforcement ratio and detailing. Second model consist of a vertical unbonded
posttensioned tendons replacing half of rebar. The both models was subjected to nonlinear time history analysis and
static pushover analysis. Different global responses of both the shear walls are plotted and it is concluded from analysis
that posttensioned wall performs well with reduced storey drift and self-centering capability as compared to conventional
reinforced concrete shear wall