Shaking table test study on the seismic isolation effect of a hybrid passive control system

Abstract

Abstract In this paper, the effects of control of a hybrid passive control system with energy consumption between the isolated structure and the adjacent structure, which was proposed recently by other researchers, is studied by shaking table test. Compared with a single seismic isolation system, this hybrid control system combines seismic isolation technique with damper energy dissipation and has strong robustness with application to seismic waves in different frequency domains. By inputting seismic waves in different frequency domains through shaking table tests, the effects of the control systems with different vibration reduction and isolation schemes under different frequency domain ground motions are studied. Finally, the finite element numerical simulations are compared with the test results. Research results show that, compared with ordinary periodic seismic waves, the long-period seismic waves have more obvious effects on structural displacement and acceleration, the overturning effect of high-rise isolated structures and the possibility of displacement over-limit of isolation bearings. For isolated structures, the multiple isolation has the best effect of vibration control. After connecting adjacent structure with viscous dampers, the hybrid passive control system is established and the seismic isolation performance of the isolated structure is further strengthened. The hybrid passive control system studied in this paper can effectively solve the problems existing in high-rise isolated structures, such as structural overturning and bearing displacement overrun and so on, and has a better control effect on structural responses under different frequency domain seismic excitations.