Seismic performance of reinforced concrete (RC) shear walls with and without damped outriggers and controlled rocking
Lisa Tobber, T.Y. Yang, Fawad Ahmed Najam
Abstract
Reinforced concrete shear wall system (RCSW) is one of the most prevalent lateral force-resisting systems in high-rise buildings worldwide. With increasing demands for superior seismic performance , constructability , and cost-effectiveness, various new technologies have been proposed in recent years. Among these, the controlled outriggered rocking wall (CORW) system is developed as a promising solution to improve the seismic performance of conventional RC shear wall systems. CORW system combines a damped outrigger (at roof level) and a controlled rocking (at the base) to a conventional RC shear wall system. In this study, the seismic performance of the conventional RC shear wall system is compared with the same system with a damped outrigger (at roof level), the same system with controlled rocking (at the base) and the CORW system. The results show that the seismic performance of conventional RC shear wall system can be significantly improved by introducing either, (a) damped outrigger at roof level, (b) controlled rocking at base level, or using the proposed CORW system.