建筑结构地震反应的MR智能基础隔震控制
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摘要
针对基础隔震局限于减小地震波高频成分对结构影响的缺点,将磁流变(MR)阻尼器与滚动隔震支座相结合形成MR智能基础隔震系统并应用到结构控制中。基于MR阻尼器的Sigmoid模型,进行模糊半主动控制策略设计。在不同种类不同强度的地震波作用下,对智能基础隔震控制下2层钢框架结构的反应进行了仿真分析。结果表明,MR智能基础隔震系统是一种可靠而有效的控制系统,模糊半主动控制策略能够有效控制结构的地震反应。
According to the disadvantages of the effects that base isolation is limited to high frequency components of seismic wave,smart base isolation system consisting of rolling isolation bearing and magnetorheological(MR) damper is applied to structural vibration control.Based on magnetorheological damper employing a Sigmoid model,a fuzzy semi-acive control strategy suitable for smart base isolation is presented.Simulation analysis is carried out to a two-story steel frame structure employing smart base isolation in the action of different kinds and magnitudes of earthquake wave.The results show that smart base isolation system is reliable and effective,and seismic response can be controlled effectively by fuzzy semi-active control strategy.
According to the disadvantages of the effects that base isolation is limited to high frequency components of seismic wave,smart base isolation system consisting of rolling isolation bearing and magnetorheological(MR) damper is applied to structural vibration control.Based on magnetorheological damper employing a Sigmoid model,a fuzzy semi-acive control strategy suitable for smart base isolation is presented.Simulation analysis is carried out to a two-story steel frame structure employing smart base isolation in the action of different kinds and magnitudes of earthquake wave.The results show that smart base isolation system is reliable and effective,and seismic response can be controlled effectively by fuzzy semi-active control strategy.
引文
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[8]巫文君.利用MR阻尼器的隔震结构振动控制试验及仿真分析[D].武汉:武汉理工大学,2009Wu Wen-jun.The Structural Vibration ControlExperiment and Numerical Simulation of Base-isolatedStructures with MR Dampers[D].Wuhan:WuhanUniversity of Technology,2009(in Chinese)
[2]Chang S P,Makris N,Whittaker A S,Thompson ACT.Experimental and analytical studies on the performance ofhybrid isolation systems[J].Earthquake Engineering andStructure Dynamic,2002(31):421～443
[3]张永山,付伟庆,王焕定.MR阻尼器智能基础隔震系统数值模拟研究(Ⅰ)[J].广州大学学报(自然科学版),2005,4(6):521～525Zhang Yong-shan,Fu Wei-qing,Wang Huan-ding.Research on numerical simulation of smart base isolationsystem with MR damper(Ⅰ)[J].Journal of GuangzhouUniversity(Natural Science Edition),2005,4(6):521～525(in Chinese)
[4]刘强.MR智能基础隔震结构抗震性能分析[J].低温建筑技术,2008,(2):53～55Liu Qiang.Seismic response analysis of intelligent based-isolated structure with MR damper[J].Low TemperatureArchitecture Technology,2008,(2):53～55(in Chinese)
[5]吴冬梅,刘树堂,刘智勇.SMA2滚动隔震火炬塔的地震反应分析[J].广州大学学报(自然科学版),2007,6(1):82～86Wu Dong-mei,Liu Shu-tang,Liu Zhi-yong.Seismicresponse analysis of torch tower with SMA2 rolling bear-ings[J].Journal of Guangzhou University(NaturalScience Edition),2007,6(1):82～86(in Chinese)
[6]袁健,Paul N Roschke.滚动FPS和MR阻尼器混合基础动力学模型及仿真[J].地震工程与工程振动,2007,27(1):24～30Yuan Jian,Paul N Roschke.Dynamic model of hybridsystem with dual-rollers FPS and MR damper and itssimulation[J].Earthquake Engineering and EngineeringVibration,2007,27(1):24～30(in Chinese)
[7]徐赵东,沈亚鹏.磁流变阻尼器的计算模型及仿真分析[J].建筑结构,2003,(1):68～70Xu Zhao-dong,Shen Ya-peng.Calculating Models andSimulink Analysis About Magnetorheological Damper[J].Building Structure,2003,(1):68～70(in Chinese)
[8]巫文君.利用MR阻尼器的隔震结构振动控制试验及仿真分析[D].武汉:武汉理工大学,2009Wu Wen-jun.The Structural Vibration ControlExperiment and Numerical Simulation of Base-isolatedStructures with MR Dampers[D].Wuhan:WuhanUniversity of Technology,2009(in Chinese)
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