A Building with Semi-Active Base Isolation using Sliding Mode Control

摘要

We have developed a semi-active base-isolation system using semi-active hydraulic dampers that can be switched between two primary damping coefficients.An 11-storey university building equipped with this system was completed in April 2005.A sliding mode control has been used to reduce the acceleration response of the building,while keeping the deformation of the isolation story relatively small.Sliding mode control considering the time lag of the damper force was developed based on a bilinear optimal control theory and a control law for simultaneous bidirectional control was proposed.This paper discusses the basic performance of the semi-active hydraulic damper,the control system design,and performance verification through shaking table tests.An overview of the building in which the system was used will also be presented,and the damping effectiveness as determined by seismic response analysis is presented.