Seismic control of multi-degrees-of-freedom structures by vertical mass isolation method using MR dampers  

作　　者：Mohamad Shahrokh Abdi Masoud Nekooei Mohammad-Ali Jafari 

机构地区：[1]Department of Civil Engineering,Marivan Branch,Islamic Azad University,Marivan 6671133945,Iran [2]Department of Civil Engineering,Science and Research Branch,Islamic Azad University,Tehran 1477893855,Iran [3]Structural Department of Transmission and Distribution Research Center,Niroo Research Institute(NRI),Tehran 1468613113,Iran

出　　处：《Earthquake Engineering and Engineering Vibration》2024年第2期503-510,共8页地震工程与工程振动（英文刊）

摘　　要：Vertical mass isolation(VMI)is one of the novel methods for the seismic control of structures.In this method,the entire structure is assumed to consist of two mass and stiffness subsystems,and an isolated layer is located among them.In this study,the magnetorheological damper in three modes:passive-off,passive-on,and semi-active mode with variable voltage between zero and 9 volts was used as an isolated layer between two subsystems.Multi-degrees-of-freedom structures with 5,10,and 15 floors in two dimensions were examined under 11 pairs of near field earthquakes.On each level,the displacement of MR dampers was taken into account.The responses of maximum displacement,maximum inter-story drift,and maximum base shear in controlled and uncontrolled buildings were compared to assess the suggested approach for seismic control of the structures.According to the results,the semi-active control method can reduce the response by more than 12%compared to the uncontrolled mode in terms of maximum displacement of the mass subsystem of the structures.This method can reduce more than 16%and 20%of the responses compared to the uncontrolled mode in terms of maximum inter-story drift and base shear of the structure,respectively.

关 键 词：seismic control vertical mass isolation base shear magnetorheological damper semi-active control 

分 类 号：TU352.12[建筑科学—结构工程]