Modelling and experimental study of a semi-active base isolator employing magnetorheological elastomer
A semi-active base isolator employing magntorheological elastomer(MRE)provides the protected structure controllable stiffness at the isolation layer when the isolator is subjected to tunable input current.With such unique feature,the MRE base isolator can effectively shift the natural frequency of the entire system and hence protect the superstructure from hazardous seismic excitations.To evaluate the feasibility and performance of applying MRE base isolator in vibrational control,a model should be developed first to present the correlation between output shear force and input parameters,i.e.displacement,velocity,current,etc.This paper reports the characterisation and modelling of the device to explore and reproduce the unique dynamic features of the MRE isolator.To fully evaluate the mechanism of the proposed model,an investigation about the dependence of the proposed model on relevant parameters is carried out.Meanwhile,to evaluate the precision of the prediction made by the model,a experimental testing is carried out to compare the seismic-proof performance of a fixed base building and a building with MRE base isolation system.Test results reveal that the proposed Bouc-Wen model can precicely reproduce the dynamics of the MRE isolator and MRE base isolation can significantly reduce the structural response.
magnetorheological elastomer (MRE) base isolation Bouc-Wen model seismic protection semi-active control
Xiaoyu.Gu Bijan.Samali Yang.Yu Jianchun.Li Yancheng.Li Mohsen.Askari
Centre for Infrastructure Engineering,Western Sydney University,Sydney,Australia Faculty of Engineering & IT,University of Technology,Sydney
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1027-1037
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）