Earthquake response control of a super high-rise structure subjected to long-period ground motions via a novel viscous damped system with multilever mechanism

A novel viscous damped system and its principles are proposed in the paper. It is a novel viscous damped system with multilever mechanism that can improve the energy dissipation capacity of conventional viscous dampers. In order to compare the damping effects of the novel viscous damper with that of the conventional viscous damper, a shaking table test of a three-story steel frame structure is performed. Testing results indicate that the novel viscous damped system is more efficient. The elastic time-history analysis of a super high-rise frame-core tube structure is studied under the frequently occurring earthquake. Dynamic loads take two groups of ground motions with different period characteristics into account. Main response values such as base shear, interstory drift, and acceleration factor under long-period ground motions are apparently larger than the seismic results due to standard ground motions. Responses between the undamped structure and the damped structure with conventional viscous dampers or the latest products are compared. It is concluded that the proposed viscous damped system can perform more effectively in reducing high-rise structural responses subject to long-period ground motions.