Control of Seismic Response Displacement of Base Isolated Structure Specimen by Friction Damper with Coupling Mechanism
ZOU Shuang
IKENAGA Masahiro
IKAGO Kohyu
FUKUMI Yuji
INOE Norio
Abstract：To avoid or mitigate the damage caused by such excessive displacement,a new device for controlling seismic displacement of base isolated structure by the means of a friction damper with coupling mechanism was proposed by Inoue at al.In this paper,the structure and working principle of the damper was introduced.Through the harmonic loading test and shaking table test,the performance of damper,control effect and impact on the vibration characteristics of the upper structure was researched.The results show that the damper with elastic perfectly has plastic restoring force characteristics.After installing the damper,the maximum response displacement of the isolated story is controlled effectively,and the maximum acceleration on the superstructure is slight increased.Due to the increase of the stiffness of the isolation layer after the damper is coupled,the higher order vibration components is increased.But there is no obvious increase in the acceleration of the isolated structure in the moment of the damper connection,viscous dampers as the isolation layer,the shaking table test for a mid-story isolation structure was conducted.For a four-story steel frame model,the locations of isolation layer are set at bottom of the first story,top of the first story,top of the second story or top of the third story in turn.Changing the location of isolation layer,acceleration,story displacement and story shear force coefficient were measured.The results show that mid-story.
Keywords：Base isolated structureControl of seismic response displacementShaking table testFriction damperHigher mode vibration
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 97-103 )