耦合地震作用下的MRD与LRB混合控制结构动力分析
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摘要
为改善铅芯橡胶支座(LRB)隔震结构的减震效果和适用范围,研究双向耦合地震作用对减震效果的影响。提出3种磁流变阻尼器(MRD)与LRB隔震混合方案,建立其双向耦合地震作用下的动力分析模型并推导出振动控制方程。对7层MRD与LRB隔震混合控制结构进行地震反应分析,3种混合方案在3种工况荷载作用下的相对加速度峰值、相对速度峰值、相对位移峰值和层间剪力峰值分别比LRB隔震结构有不同程度的降低。当考虑竖向地震作用时,随着竖向地震作用的加大,结构的地震反应有小幅度的增加,但各种结构方案都具有良好的减振效果。表明各混合方案在各种工况下的各项地震反应均得到了更好的控制,而混合方案3的减震效果更加明显。
In order to improve the effect of shock absorption and the application range of base-isolated structure with lead rubber bearing (LRB) and study the influence of the action of coupling earthquake in both horizontal and vertical direction to vibration control structures, three kinds of hybrid projects with magnetorheological damper (MRD) and LRB are proposed in the paper. The governing differential equation for the hybrid structure with MRD and LRB under the action of coupling earthquake in both horizontal and vertical direction is set up. Seismic response analysis of a 7-storey hybrid structure with MRD and LRB is carried out. Compared with sliding base-isolated structure, all of the peak values of various seismic responses of three hybrid projects are reduced. The results of dynamic analysis show that the seismic responses of hybrid structure with MRD and LRB get better control than sliding base-isolated structure under various loading conditions and that the control effect of the third hybrid project is the best.
In order to improve the effect of shock absorption and the application range of base-isolated structure with lead rubber bearing (LRB) and study the influence of the action of coupling earthquake in both horizontal and vertical direction to vibration control structures, three kinds of hybrid projects with magnetorheological damper (MRD) and LRB are proposed in the paper. The governing differential equation for the hybrid structure with MRD and LRB under the action of coupling earthquake in both horizontal and vertical direction is set up. Seismic response analysis of a 7-storey hybrid structure with MRD and LRB is carried out. Compared with sliding base-isolated structure, all of the peak values of various seismic responses of three hybrid projects are reduced. The results of dynamic analysis show that the seismic responses of hybrid structure with MRD and LRB get better control than sliding base-isolated structure under various loading conditions and that the control effect of the third hybrid project is the best.
引文
[1]张延年,范鹤,董锦坤.基础隔震结构的系统参数优化设计[J].沈阳建筑大学学报,2006,22(3):529―533.Zhang Yannian,Fan He,Dong Jinkun.Parameter optimization of base-isolated structure[J].Journal of Shenyang Jianzhu University,2006,22(3):529―533.(in Chinese)
[2]Ribakov Y,Gluck J.Active control of MDOF structures with supplemental electrorheological fluid dampers[J].Earthquake Engineering and Structural Dynamics,1999,28(2):143―156.
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[4]张延年,刘剑平,刘斌.多向地震耦合作用下MR阻尼结构的地震反应分析[J].东北大学学报(自然科学版),2005,26(9):897―900.Zhang Yannian,Liu Jianping,Liu Bin.Seismic responses of MRD structure under coupling effect of multi-directional earthquake[J].Journal of Northeastern University(Natural Science),2005,26(9):897―900.(in Chinese)
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[7]Yang G Q,Spencer J B,Jung H J.Dynamic modeling of large-scale magnetorheological damper systems for civil engineering applications[J].Journal of Engineering Mechanics,2004,130(9):1107―1114.
[8]Xia P Q.An inverse model of MR damper using optimal neural network and system identification[J].Journal of Sound and Vibration,2003,266(5):1009―1023.
[9]Atray V S,Roschke P N.Neuro-fuzzy control of railcar vibrations using semiactive dampers[J].Computer-Aided Civil and Infrastructure Engineering,2004,19(2):81―92.
[10]张延年,董锦坤,朱朝艳.考虑竖向地震作用的振动控制及其优化研究[J].力学与实践,2006,28(3):24―29.Zhang Yannian,Dong Jinkun,Zhu Chaoyan.Seismic responses of structure when the effect of vertical earthquake is considered and its optimization[J].Mechanics in Engineering,2006,28(3):24―29.(in Chinese).
[11]张延年,刘剑平,李艺.双向耦合地震作用下的MRD与滑移隔震混合控制结构[J].沈阳建筑大学学报(自然科学版),2006,22(1):1―5.Zhang Yannian,Liu Jianping,Li Yi.Structural hybridvibration control with MRD and sliding base-isolation under coupling effect of bidirectional earthquake[J].Journal of Shenyang Jianzhu University(Natural Science),2006,22(1):1―5.(in Chinese)
[12]张延年,李宏男.双向耦合地震作用下滑移隔震结构振动控制及其优化研究[J].地震工程与工程振动,2006,27(1):1―6.Zhang Yannian,Li Hongnan.Seismic responses of sliding base-isolated structure under bidirectional coupling earthquake and its optimization[J].Journal of Earthquake Engineering and Engineering Vibration,2006,27(1):1―6.(in Chinese)
[2]Ribakov Y,Gluck J.Active control of MDOF structures with supplemental electrorheological fluid dampers[J].Earthquake Engineering and Structural Dynamics,1999,28(2):143―156.
[3]Spencer B F,Dyke S J,Sain M K.Phenomena logical model for magnetorheological dampers[J].Journal of Engineering Mechanics,ASCE,1997,123(3):230―238.
[4]张延年,刘剑平,刘斌.多向地震耦合作用下MR阻尼结构的地震反应分析[J].东北大学学报(自然科学版),2005,26(9):897―900.Zhang Yannian,Liu Jianping,Liu Bin.Seismic responses of MRD structure under coupling effect of multi-directional earthquake[J].Journal of Northeastern University(Natural Science),2005,26(9):897―900.(in Chinese)
[5]李宏男,杨浩,李秀领.磁流变阻尼器参数化动力学模型研究进展[J].大连理工大学学报,2004,44(4):416―424.Li Hongnan,Yang Hao,Li Xiuling.Advances of research on parameterized dynamic models of magnetorheological dampers[J].Journal of Dalian University of Technology,2004,44(4):4―424.(in Chinese)
[6]Toshihiko S,Tomoya S,Shin M.Design and performance verification of variable damper using MR fluid[J].American Society of Mechanical Engineers,Dynamic Systems and Control Division(Publication)DSC,2003,72(2):989―994.
[7]Yang G Q,Spencer J B,Jung H J.Dynamic modeling of large-scale magnetorheological damper systems for civil engineering applications[J].Journal of Engineering Mechanics,2004,130(9):1107―1114.
[8]Xia P Q.An inverse model of MR damper using optimal neural network and system identification[J].Journal of Sound and Vibration,2003,266(5):1009―1023.
[9]Atray V S,Roschke P N.Neuro-fuzzy control of railcar vibrations using semiactive dampers[J].Computer-Aided Civil and Infrastructure Engineering,2004,19(2):81―92.
[10]张延年,董锦坤,朱朝艳.考虑竖向地震作用的振动控制及其优化研究[J].力学与实践,2006,28(3):24―29.Zhang Yannian,Dong Jinkun,Zhu Chaoyan.Seismic responses of structure when the effect of vertical earthquake is considered and its optimization[J].Mechanics in Engineering,2006,28(3):24―29.(in Chinese).
[11]张延年,刘剑平,李艺.双向耦合地震作用下的MRD与滑移隔震混合控制结构[J].沈阳建筑大学学报(自然科学版),2006,22(1):1―5.Zhang Yannian,Liu Jianping,Li Yi.Structural hybridvibration control with MRD and sliding base-isolation under coupling effect of bidirectional earthquake[J].Journal of Shenyang Jianzhu University(Natural Science),2006,22(1):1―5.(in Chinese)
[12]张延年,李宏男.双向耦合地震作用下滑移隔震结构振动控制及其优化研究[J].地震工程与工程振动,2006,27(1):1―6.Zhang Yannian,Li Hongnan.Seismic responses of sliding base-isolated structure under bidirectional coupling earthquake and its optimization[J].Journal of Earthquake Engineering and Engineering Vibration,2006,27(1):1―6.(in Chinese)
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