相邻模型结构MR阻尼器半主动控制振动台试验
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摘要
利用振动台对磁流变(MR)阻尼器连接的相邻模型结构的地震响应进行了研究.为了验证基于MR阻尼器控制系统的控制效果,振动台试验中对3种地震激励下的相邻模型结构采用了2种被动控制策略和3种半主动控制策略.试验中,最大电流被动控制策略和3种半主动控制策略使相邻模型结构各层的地震响应皆有明显降低;半主动控制策略皆采用了加速度反馈的方法以减少试验中所用传感器的数量.试验结果表明:MR阻尼器是有效的半主动控制装置,在被动和半主动控制系统中有稳定的控制效果;基于加速度反馈的控制方法适用于具有闭环增益矩阵的控制算法,可以减少控制系统的硬件投入以及增加半主动控制系统在实际工程应用中的可行性.
The seismic response of two adjacent model structures connected with magneto-rheological(MR) dampers was studied using the shaking table.In order to evaluate the control effect of control system based on MR damper,two passive control and three semi-active control strategies in shake table test were carried out under three different ground motions.In the test,the seismic responses for all floors of adjacent model structures were significantly re-duced by using maximum current passive strategy and three semi-active control strategies.Moreover,the acceleration feedback method was applied to all three semi-active control strategies in order to reduce the number of sensors used in the test.The test results show that the MR damper is an effective semi-active controller and behaves reliably both in passive and semi-active control systems.Results also indicate that the acceleration feedback method has adaptability to control strategies with closed-loop gain matrix,which can reduce the hardware input of control system and increase the feasibility of the semi-acitve control system in practical engineering applications.
The seismic response of two adjacent model structures connected with magneto-rheological(MR) dampers was studied using the shaking table.In order to evaluate the control effect of control system based on MR damper,two passive control and three semi-active control strategies in shake table test were carried out under three different ground motions.In the test,the seismic responses for all floors of adjacent model structures were significantly re-duced by using maximum current passive strategy and three semi-active control strategies.Moreover,the acceleration feedback method was applied to all three semi-active control strategies in order to reduce the number of sensors used in the test.The test results show that the MR damper is an effective semi-active controller and behaves reliably both in passive and semi-active control systems.Results also indicate that the acceleration feedback method has adaptability to control strategies with closed-loop gain matrix,which can reduce the hardware input of control system and increase the feasibility of the semi-acitve control system in practical engineering applications.
引文
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[9]Bhaskararao A V,Jangid R S.Seismic analysis of struc-tures connected with friction dampers[J].Engineering Structures,2006,28(5):690-703.
[10]Bhaskararao A V,Jangid R S.Optimum viscous damper for connecting adjacent SDOF structures for harmonic and stationary white-noise random excitations[J].Earth-quake Engineering and Structural Dynamics,2007,36(4):563-571.
[11]刘建军.新型磁流变阻尼器及其智能控制方法研究[D].天津:天津大学建筑工程学院,2008.Liu Jianjun.New Magnetorheological Dampers and Its Intelligent Control Algorithms[D].Tianjin:School of Civil Engineering,Tianjin University,2008(in Chi-nese).
[12]姜南.应用MR阻尼器的相邻建筑地震反应[D].天津:天津大学建筑工程学院,2008.Jiang Nan.Theory and Experiment on Semi-Active Con-trol of Seismic Responses of Adjacent Buildings Using MR Dampers[D].Tianjin:School of Civil Engineer-ing,Tianjin University,2008(in Chinese).
[2]Xu Y L,Chen J,Ng C L,et al.Semiactive seismic response control of buildings with podium structure[J].Journal of Structural Engineering,2005,131(6):890-899.
[3]Zhu H P,Xu Y L.Optimum parameters of Maxwell model-defined dampers used to link adjacent structures[J].Journal of Sound and Vibration,2005,279(1/2):253-274.
[4]Ok S Y,Song J,Park K S.Optimal design of hysteretic dampers connecting adjacent structures using multi-objective genetic algorithm and stochastic linearization method[J].Engineering Structures,2008,30(5):1240-1249.
[5]Ying Z G,Ni Y Q,Ko J M.Non-linear stochastic op-timal control for coupled-structures system of multi-degree-of-freedom[J].Journal of Sound and Vibration,2004,274(3/4/5):843-861.
[6]Matsagar V A,Jangid R S.Viscoelastic damper con-nected to adjacent structures involving seismic isolation[J].Journal of Civil Engineering and Management,2005,11(4):309-322.
[7]Kim J,Ryu J,Chung L.Seismic performance of struc-tures connected by viscoelastic dampers[J].Engineering Structures,2006,28(2):183-195.
[8]Bhaskararao A V,Jangid R S.Seismic response of adja-cent buildings connected with friction dampers[J].Bulle-tin of Earthquake Engineering,2006,4(1):43-64.
[9]Bhaskararao A V,Jangid R S.Seismic analysis of struc-tures connected with friction dampers[J].Engineering Structures,2006,28(5):690-703.
[10]Bhaskararao A V,Jangid R S.Optimum viscous damper for connecting adjacent SDOF structures for harmonic and stationary white-noise random excitations[J].Earth-quake Engineering and Structural Dynamics,2007,36(4):563-571.
[11]刘建军.新型磁流变阻尼器及其智能控制方法研究[D].天津:天津大学建筑工程学院,2008.Liu Jianjun.New Magnetorheological Dampers and Its Intelligent Control Algorithms[D].Tianjin:School of Civil Engineering,Tianjin University,2008(in Chi-nese).
[12]姜南.应用MR阻尼器的相邻建筑地震反应[D].天津:天津大学建筑工程学院,2008.Jiang Nan.Theory and Experiment on Semi-Active Con-trol of Seismic Responses of Adjacent Buildings Using MR Dampers[D].Tianjin:School of Civil Engineer-ing,Tianjin University,2008(in Chinese).
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