ABSTRACT
In this study, rate-independent linear damping (RILD) is proposed for the seismic protection of inter-story isolated structures. For practical applications, the RILD force is approximated using a causal algorithm and then tracked using semi-active control. Both numerical simulation and shake table real-time hybrid simulation (RTHS) are used to study a 14-story inter-story isolated structure. First, the causal approximation of RILD evaluated in RTHS is compared to numerical simulation. Second, the benefits of RILD for inter-story isolated structures are demonstrated as compared to conventional damping. RILD offers an attractive control alternative by restricting isolation layer displacements without amplifying accelerations.
Acknowledgments
The authors would like to acknowledge Osaka Prefecture and Dr. Toshihide Kashima of the Building Research Institute of Japan for providing the Sakishima site record of the 2011 Great East Japan Earthquake.