Seismic Performance of Shear-Wall and Shear-Wall Core Buildings Designed for Indian Codes

Abstract

The shear-wall and shear-wall cores are the most commonly used lateral load resisting elements in mid-rise to high-rise RC buildings. The present study focusses on estimation of seismic performance of shear-walls and shear-wall core buildings designed for Indian codes using non-linear pushover analysis. The literature review for modelling of shear-walls is carried out and the most commonly used models, i.e. wide column model and shell element model are validated through the experimental results available in literature. It is observed that both the wide column model and shell element model predict nearly the same strength capacity for the shear-walls and shear-wall cores. However, the wide column model underestimates while the shell element model overestimates the ductility capacity of the shear-walls and shear-wall cores. It is also observed that the stiffness obtained from moment-curvature analysis is in close agreement with the experimental results while the shell element model predicts high initial stiffness and after cracking it reduces and matches with experimental results. These validated models are implemented for performance evaluation of “Dual Systems” designed according to Indian code. It has been observed that buildings with shear-walls placed at periphery have better performance than buildings with centrally placed shear-wall core.