Abstract
Active, passive and semi-active controls 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. The main feature is the simplicity in formulation, design and implementation. It is based on using a passive static hyperbolic function depending only on the base velocity. This function ensures energy dissipation capability with always bounded control force. The control is applied to a three-dimensional benchmark problem, which is used by the structural control community as a state-of-the-art model for numerical experiments of seismic control attenuation. The performance indices show that the proposed hyperbolic controller behaves satisfactorily and with a reasonable control effort. Copyright © 2009 John Wiley & Sons, Ltd.
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