高层建筑结构地震反应的分散遗传-模糊控制研究
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摘要
文章针对地震作用下高层建筑结构半主动控制问题,引入分散控制的策略,将模糊逻辑理论与遗传算法原理相结合,应用遗传算法优化子系统模糊规则库,提出分散遗传-模糊控制(decentralized genetic-fuzzycontrol,简称DGFC)算法,并应用于高层结构振动控制中,通过MR阻尼器实现结构地震反应控制;对某20层钢结构Benchmark结构模型进行数值计算与分析,结果表明,DGFC算法可以有效地抑制结构地震反应,且保证了系统鲁棒性和可靠性。
A method for semi-active vibration control of high-rise buildings under earthquakes is studied.By introducing the decentralized control strategy and integrating the fuzzy logic and genetic algorithm(GA),an algorithm named decentralized genetic-fuzzy control(DGFC) is presented for the structural vibration control of high-rise buildings by using fuzzy rule base of genetic algorithm optimization subsystem.Each substructure is installed with MR dampers to achieve the seismic response control of the structure.The numerical calculation and analysis of the Benchmark model of a typical 20-storey steel frame are carried out to test the performance of the presented control strategy.The results indicate that the DGFC algorithm can effectively mitigate the structural seismic response while ensuring the robustness and reliability of the system.
A method for semi-active vibration control of high-rise buildings under earthquakes is studied.By introducing the decentralized control strategy and integrating the fuzzy logic and genetic algorithm(GA),an algorithm named decentralized genetic-fuzzy control(DGFC) is presented for the structural vibration control of high-rise buildings by using fuzzy rule base of genetic algorithm optimization subsystem.Each substructure is installed with MR dampers to achieve the seismic response control of the structure.The numerical calculation and analysis of the Benchmark model of a typical 20-storey steel frame are carried out to test the performance of the presented control strategy.The results indicate that the DGFC algorithm can effectively mitigate the structural seismic response while ensuring the robustness and reliability of the system.
引文
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[2]Johansen J D.Active control of frame structures:a decen-tralized approach[D].University of California,2008.
[3]Ma T W,Xu N S,Tang Y.Decentralized robust control ofbuilding structures under seismic excitations[J].Earth-quake Engng Struct Dyn,2008,37(1):121-140.
[4]Wang Y,Lynch J P,Law K H.Decentralized H∞controllerdesign for large-scale civil structures[J].Earthquake En-gng Struct Dyn,2009,38(3):377-401.
[5]Ma T W,Johansen J,Xu N S,et al.Improved decentralizedmethod for control of building structures under seismic ex-citation[J].Journal of Engineering Mechanics,2010,136(5):662-673.
[6]Ahlawat A A,Ramaswamy A.Multiobjective optimal struc-tural vibration control using fuzzy logic control system[J].ASCE Journal of Structural Engineering,2001,127(11):1330-1337.
[7]Ali S F,Ramaswamy A.Optimal fuzzy logic control for MDof structural systems using evolutionary algorithms[J].Engineering Applications of Artificial Intelligence,2009,22(3):407-419.
[8]欧进萍.结构振动控制:主动、半主动和智能控制[M].北京:科学出版社,2003:10-100.
[9]汪权,王建国,张鸣祥.结构地震反应线性二次型最优迭代学习控制[J].应用科学学报,2010,28(2):197-202.
[10]侯高峰,王建国,张茂.基于MIDAS/GEN高层建筑结构静力弹塑性分析[J].合肥工业大学学报:自然科学版,2008,31(10):1664-1667.
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