双向水平地震作用下串联隔震结构的振动控制
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摘要
国内外许多实际的隔震工程都采用橡胶隔震支座与地下室悬臂柱串联的隔震方案。本文针对串联隔震结构提出了振动控制策略,即在隔震层附设一定数量的减震控制装置,同时,本文建立了在双向水平地震作用下串联隔震结构振动控制体系的运动方程,并考虑了串联隔震结构底部柔性对底部刚度的影响,应用序列最优控制算法对算例进行隔震控制。结果表明,这种隔震控制体系可以有效地减小结构在双向水平地震作用下的地震反应,对隔震层的位移响应降低了至少63.1%,有效地提高了串联隔震结构体系的整体稳定。
The structure that the rubber isolation pad is connected with the cantilever column is often used at home and abroad.In this paper,a vibration control strategy for serially connected isolated structures is proposed.That is control devices are installed at the isolation level.The equation motion of the vibration control system to the serially connected isolated structures subjected to two-directional horizontal earthquake is established,and the effect which the flexibility of the bottom in the serially connected isolated structures to the stiffness is considered.Sequential Optimal Control algorithm is used to control the example.The results show that the isolated control strategy is very effective in reducing structure seismic response under the two-directional horizontal earthquake,and the movent of isolation layer is reduced at least 63.1%.So the wholly stability of structure can be improved effectively.
The structure that the rubber isolation pad is connected with the cantilever column is often used at home and abroad.In this paper,a vibration control strategy for serially connected isolated structures is proposed.That is control devices are installed at the isolation level.The equation motion of the vibration control system to the serially connected isolated structures subjected to two-directional horizontal earthquake is established,and the effect which the flexibility of the bottom in the serially connected isolated structures to the stiffness is considered.Sequential Optimal Control algorithm is used to control the example.The results show that the isolated control strategy is very effective in reducing structure seismic response under the two-directional horizontal earthquake,and the movent of isolation layer is reduced at least 63.1%.So the wholly stability of structure can be improved effectively.
引文
[1]谭平,闫维明,周福霖.大平台多塔楼新型隔震体系的智能磁流变控制[J].工程抗震与加固改造,2007,29(3):41～47Tan Ping,Yan Wei-ming,Zhou Fu-lin.Smart Control for a New Seismic Isolation System of Multi-tower Structure on a Large Platform Using MR Dampers[J].Earthquake Resistant Engineering and Retrofitting,2007,29(3):41～47(in Chinese)
[2]赵林.结构振动半主动控制的实用性研究[J].工程抗震与加固改造.2005,27(2):32～39Zhao Lin.Study on Practicability of the Structural Vibration Semi-active Control Technology[J].Earthquake Resistant Engineering and Retrofitting,2005,27(2):32～39(in Chinese)
[3]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,2007,27(1):141～146Zhang Yan-nian,Li Hong-nan.Seismic responses of sliding base-isolated structure under bidirectional cou-pling earthquake and its optimization[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(1):141～146(in Chinese)
[4]杨万庆.屋盖MR智能隔震系统对升船机地震反应的智能控制[J].工程抗震与加固改造,2005,27:81～84Yang Wan-qing.Smart seismic control of lift-ship structure with roof intelligent isolation system.Earthquake Resistant Engineering and Retrofitting.2005,27:81～84(in Chinese)
[5]Chi Y,Sain M K,Pham K D,Spencer Jr B F.Structural control paradigms for an asymmetric building[A].Proceedings of the8th ASCE Special Conference on Probabilistic Mechanics and Structural Reliability[C],PMC2000-152
[6]杜永峰,李慧,赵国藩.地震作用下结构振动最优控制的一种一般算法[J].大连理工大学学报,2004,44(6):864～869Du Yong-feng,Li Hui,Zhao Guo-fan.A General Algorithm of the Structure Vibration Optimal Control of Seismic Excitations[J].Journal of Dalian University of Technology,2004,44(6):864(in Chinese)
[7]杜永峰.被动与智能隔震结构地震响应分析及控制算法[D].大连:大连理工大学,2003Du Yong-feng.Analysis of Seismic Response of Passive and Smart Isolated Structures and Investigation to Control Algorithms[D].Dalian:Dalian University of Technology,2003(in Chinese)
[2]赵林.结构振动半主动控制的实用性研究[J].工程抗震与加固改造.2005,27(2):32～39Zhao Lin.Study on Practicability of the Structural Vibration Semi-active Control Technology[J].Earthquake Resistant Engineering and Retrofitting,2005,27(2):32～39(in Chinese)
[3]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,2007,27(1):141～146Zhang Yan-nian,Li Hong-nan.Seismic responses of sliding base-isolated structure under bidirectional cou-pling earthquake and its optimization[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(1):141～146(in Chinese)
[4]杨万庆.屋盖MR智能隔震系统对升船机地震反应的智能控制[J].工程抗震与加固改造,2005,27:81～84Yang Wan-qing.Smart seismic control of lift-ship structure with roof intelligent isolation system.Earthquake Resistant Engineering and Retrofitting.2005,27:81～84(in Chinese)
[5]Chi Y,Sain M K,Pham K D,Spencer Jr B F.Structural control paradigms for an asymmetric building[A].Proceedings of the8th ASCE Special Conference on Probabilistic Mechanics and Structural Reliability[C],PMC2000-152
[6]杜永峰,李慧,赵国藩.地震作用下结构振动最优控制的一种一般算法[J].大连理工大学学报,2004,44(6):864～869Du Yong-feng,Li Hui,Zhao Guo-fan.A General Algorithm of the Structure Vibration Optimal Control of Seismic Excitations[J].Journal of Dalian University of Technology,2004,44(6):864(in Chinese)
[7]杜永峰.被动与智能隔震结构地震响应分析及控制算法[D].大连:大连理工大学,2003Du Yong-feng.Analysis of Seismic Response of Passive and Smart Isolated Structures and Investigation to Control Algorithms[D].Dalian:Dalian University of Technology,2003(in Chinese)
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