Influence of Shear Core Curtailment on the Structural Response of Core-Wall Structures

Abstract

Shear walls and shear cores are the major lateral load resisting elements in multi-storeyed framed structures because of their proven track record in mitigating the damage under severe earthquake ground motions including the recent ones. The contrasting deflected profiles of shear core and frame actually help in reducing the drift of the structure. The reduction is primarily attributed to the level of horizontal interaction between cores and frames. The present study aims to simulate the horizontal interaction between core wall and frames using the dimensionless parameter ($\alpha H$) capable of characterizing the individual behaviors of the components of the dual system using the finite element analysis with different levels of curtailment of shear core. The triangular loading has been considered, and the computations have been made considering the site located in zone 4 with medium soil characteristics. To this end, in order to identify the optimum level of curtailment, an analytical study has been done on some shear core buildings with different levels of curtailment of shear core. The structural performance of the buildings with different levels of curtailment has been assessed for different parameters, namely, storey drift, deflection, bending moment, and shear forces using finite element modeling and analysis.