A velocity-based seismic control for base-isolated building structures

摘要

Passive, active and semi-active control have been extensively considered to improve the protection of base-isolated structures against earthquakes. This paper presents a strategy to apply control forces to the base of an isolated structure to enhance the performance of purely passive devices. The\udmain feature is the simplicity in formulation, design and implementation. It is formulated as a static nonlinear function\uddepending only on the base velocity. This function ensures energy dissipation capability with always bounded control\udforce. The control is applied to a three-dimensional benchmark problem which is used by the structural control community as\uda state-of-the-art model for numerical experiments of seismic control attenuation. Several performance indices show that the\udproposed controller is efficient with a reasonable control effort.