Shaking Table Test Study on Mid-story Isolation Structures with Viscous Dampers
JIN Jianmin
TAN Ping
CHEN Peng
HUANG Xiangyun
CHEN Jianqiu
Abstract：Mid-story isolation structure is developing from base isolation structures.As a complex structural system,the work mechanism of base isolation structure is not entirely appropriate for mid-story isolation structure,and the prolonging of structural natural period may not be able to decrease the seismic response of substructure and superstructure simultaneously.In the previous theoretical and experimental studies,the damping of isolation layer was mostly provided by lead rubber bearings.In this paper,using natural rubber bearings and 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 isolation with viscous dampers has a good seismic reduction effectiveness.The finite element model of a mid-story isolation system was established,and the comparison between the finite element analysis results and test results was conducted.
Keywords：Mid-story isolationLinear natural rubber bearingViscous dampersShaking table testFinite element analysis
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：6( 91-96 )