| Base isolation has been well known as a means of providing a structure with the capability to withstand earthquake. Over the last two decades, much progress has been made in the field of base isolation. By proper design, it is believed that passive isolation systems could give remarkable response reduction for a particular excitation, especially in acceleration reduction. However passive isolation systems lacks the adaptability to a wide spectrum of excitations. Larger base travel (deformation in base isolator) is always a big concern in base isolation applications. The quest for a solution that can reduce the base travel to an acceptable level for various excitations while still keeping a significant reduction on acceleration is an unending challenge. This research is one effective and powerful attempt to meet this challenge.; This work is the first time to apply the Real-time Structural Parameter Modification (RSPM) into base isolation system and succeeded. This results from an intensive investigation on the base isolation, the animated control dynamics and the stability of animated control system followed by an intensive analytical and numerical and experimental study.; The functional switch is a key component of the animated control of a base isolation system. An extensive study on the functional switch has also been carried out as an appendix to this work. |
