Research on the Vibration Control Effect of High-Rise isolation system combined with damping device under Strong ground motions

Abstract

Considering large deformation of the upper structure for base isolation structure and easily overturned whole structure under strong ground motion, the characteristics of earthquake control and seismic response of a high-rise base isolation structure with viscous dampers are studied in this paper. At first, the motion equation of high-rise base isolation structure and high-rise combined control system is established based on the calculation model of multi-degree of freedom system with lumped masses of isolation structure; Then, the state space method and variable order numerical differential algorithm are used to calculate the seismic response of the structure; Finally, the ordinary ground motion records and near-source pulse-like ground motion records are selected as input, and the seismic response of high-rise base isolation structure and high-rise combined control system are calculated, furthermore, its characteristics of seismic response and control effect are compared. The results show that the high-rise base isolation structure with viscous dampers can reduce the structural displacement response significantly, and the displacement demand of isolation bearing can be reduced dramatically too. it is an effective way to develop the new type bearing with low yield stiffness, large deformation and a high tensile strength to solve these questions of base isolation technology in high-rise structure applications.