调液阻尼器对偏心结构扭转耦联振动控制的研究
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摘要
该文利用调液阻尼器来控制偏心结构在地震作用下的扭转耦联振动。首先建立起控制体系的运动方程及时域内的求解方法。以一个8层偏心钢结构为算例,在结构顶层沿两个主轴方向正交放置两个调液柱型阻尼器,并在结构质心处安放一个环形调液阻尼器。基于该文给出的优化目标函数和遗传优化算法,对调液阻尼器的参数进行优化设计。最后对结构输入不同场地类型的地震波,在时域内分析调液阻尼器对结构扭转耦联振动的减振作用。分析结果表明:合理设计调液阻尼器的有关参数,能使其有效控制结构的平-扭耦联振动。
This paper focuses on the seismic response control of eccentric structures by use of tuned liquid dampers.The equation of motion for the control system is derived and the solving method for the equation is presented.An 8-story eccentric steel building,with two tuned liquid column dampers on the orthogonal direction and one circular tuned liquid column damper on the mass center of the top story,is analyzed.Based on the proposed objective function,the optimal parameters of liquid dampers are optimized by Genetic Algorithm.The structural responses with and without liquid dampers subjected to bi-directional earthquakes in different site conditions are analyzed in the time domain.The results show that the torsionally coupled responses of structures can be effectively suppressed by liquid dampers with optimal parameters.
This paper focuses on the seismic response control of eccentric structures by use of tuned liquid dampers.The equation of motion for the control system is derived and the solving method for the equation is presented.An 8-story eccentric steel building,with two tuned liquid column dampers on the orthogonal direction and one circular tuned liquid column damper on the mass center of the top story,is analyzed.Based on the proposed objective function,the optimal parameters of liquid dampers are optimized by Genetic Algorithm.The structural responses with and without liquid dampers subjected to bi-directional earthquakes in different site conditions are analyzed in the time domain.The results show that the torsionally coupled responses of structures can be effectively suppressed by liquid dampers with optimal parameters.
引文
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[5]瞿伟廉,李肇胤,李桂青.U型水箱对高层建筑和高耸结构风振控制的试验和研究[J].建筑结构学报,1993,14(5):37―41.Qu Weilian,Li Zhaoyin,Li Guiqing.Experiment and research on control of wind vibration response of tall buildings and lofty structures by U-shape water tank[J].Journal of Building Structures,1993,14(5):37―41.(in Chinese)
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[7]Hitchcock P A,Kwok K C S,Watkins R D.Characteristics of liquid column vibration absorbers(LCVA)-Ⅱ[J].Engineering Structures,1997,19(2):135―144.
[8]霍林生,李宏男,孙丽.多维地震作用下非对称结构利用TLCD减震控制研究[J].地震工程与工程振动,2001,21(4):147―153.Huo Linsheng,Li Hongnan,Sun Li.Parameter study of TLCD control system excited by multi-dimensional ground motions[J].Earthquake Engineering and Engineering Vibration,2001,21(4):147―153.(in Chinese)
[9]霍林生,李宏男.环形调液阻尼器(CTLCD)对结构平移-扭转耦联振动控制的参数研究[J].工程力学,2005,22(2):124―131.Huo Linsheng,Li Hongnan.Torsion-coupled response control of structures using circular tuned liquid column dampers[J].Engineering Mechanics,2005,22(2):124―131.(in Chinese)
[10]Kim H.Wavelet-based adaptive control of structures under seismic and wind loads[D].Notre Dame:The Ohio State University,2002.
[11]李宏男,霍林生.调液阻尼器对结构扭转耦联振动控制的优化设计[J].计算力学学报,2005,22(2):129―134.Li Hongnan,Huo Linsheng.Optimal design of liquid dampers for structural torsion coupled vibration[J].Chinese Journal of Computational Mechanics,2005,22(2):129―134.(in Chinese)
[2]Gao H,Kwok K C S,Samali B.Optimization of tuned liquid column dampers[J].Engineering Structures,1997,19(6):476―486.
[3]Chen Y H,Chao C C.Optimal damping ratio of TLCDs[J].Structural Engineering and Mechanics,2000,9(3):227―240.
[4]Yalla S K,Kareem A.Optimum absorber parameters for tuned liquid column dampers[J].Journal of Structural Engineering,2000,126(8):906―915.
[5]瞿伟廉,李肇胤,李桂青.U型水箱对高层建筑和高耸结构风振控制的试验和研究[J].建筑结构学报,1993,14(5):37―41.Qu Weilian,Li Zhaoyin,Li Guiqing.Experiment and research on control of wind vibration response of tall buildings and lofty structures by U-shape water tank[J].Journal of Building Structures,1993,14(5):37―41.(in Chinese)
[6]Hitchcock P A,Kwok K C S,Watkins R D.Characteristics of liquid column vibration absorbers(LCVA)-Ⅰ[J].Engineering Structures,1997,19(2):126―134.
[7]Hitchcock P A,Kwok K C S,Watkins R D.Characteristics of liquid column vibration absorbers(LCVA)-Ⅱ[J].Engineering Structures,1997,19(2):135―144.
[8]霍林生,李宏男,孙丽.多维地震作用下非对称结构利用TLCD减震控制研究[J].地震工程与工程振动,2001,21(4):147―153.Huo Linsheng,Li Hongnan,Sun Li.Parameter study of TLCD control system excited by multi-dimensional ground motions[J].Earthquake Engineering and Engineering Vibration,2001,21(4):147―153.(in Chinese)
[9]霍林生,李宏男.环形调液阻尼器(CTLCD)对结构平移-扭转耦联振动控制的参数研究[J].工程力学,2005,22(2):124―131.Huo Linsheng,Li Hongnan.Torsion-coupled response control of structures using circular tuned liquid column dampers[J].Engineering Mechanics,2005,22(2):124―131.(in Chinese)
[10]Kim H.Wavelet-based adaptive control of structures under seismic and wind loads[D].Notre Dame:The Ohio State University,2002.
[11]李宏男,霍林生.调液阻尼器对结构扭转耦联振动控制的优化设计[J].计算力学学报,2005,22(2):129―134.Li Hongnan,Huo Linsheng.Optimal design of liquid dampers for structural torsion coupled vibration[J].Chinese Journal of Computational Mechanics,2005,22(2):129―134.(in Chinese)
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