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STMD CONTROL FOR SEISMIC RESPONSE OF TALL BUILDING
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摘要: 为了控制高层建筑的地震响应，消除控制机构驱动时产生的时滞现象，提出了由MR阻尼器构成的半主动控制系统STMD。根据MR流体剪切屈服强度与磁场强度同向变化的磁流变效应，通过外加磁场的变化来改变MR阻尼器的阻尼力，以实现对ITMD控制力的调节。根据瞬时最优控制的原则，采用了基于Hrovat控制律和开关控制律的改进的半主动控制策略，对MR阻尼器的参数进行调节。对一栋8层框架结构进行仿真分析，计算结果表明，STMD能够有效地减小高层建筑的地震响应。Abstract: In order to control the seismic response of the tall building and eliminate the / time lag0 phenomenon by actuation of the control mechanism, intelligent TMD is proposed which consists ofMR dampers. The change of yield stress of MR fluids is in the same way of magnetic field. So the controlling force of the intelligent TMD can be adjusted by changing magnetic field. According to instantaneouw optimum control principle, we use the improved sem-i active control strategy which derived from the Hrovat and on- off control strategy to analyse the parameters of the MR dampers. An eight storied frame structure is analysed. From the numerical analysis, we can see the dvice could diminish the seismic response of a tall structure.
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Key words:
- semi-active TMD /
- MR damper /
- high-rise construction /
- control
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[2] Housner G W. Structural Control:Past, Present, and Future. ASCE, J. Engrg. Mech,1997,123(9):897～958 周福霖.工程结构减震控制.北京:地震出版社,1997 [3] 李忠献,张伟,姜忻良,等.高层建筑地震反应全反馈主动TMD控制理论研究.地震工程与工程振动,1997(9):60～65 [4] 隋莉莉,欧进萍.半主动磁流变减振驱动器的工作原理及应用.哈尔滨建筑大学学报,2002(6):9～19 [5] 瞿伟廉,王军武,徐幼麟,等.ER/MR智能阻尼器耦连的带裙房高层建筑结构地震反应的半主动控制.地震工程与工程振,2000(12):87～95 [6] Makris N Burton S N, Hill Detal. Analysis and Design of ER Damper for Seismic Protection of Structure. Journal of Engineering Mechanics,1996,122(10):1003～1011 [7] 周云,吴志远,梁兴文.磁流变阻尼器对高层建筑风振反应的半主动控制.地震工程与工程振动,2001(12):159～162 [8] Michael D S, Michael C C. Seismic Testing of a Building Structure with a Semi-Active Fluid Damper Control System.Earthquake Engng. Struct.Dyn,1997,26:759～777 -
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