利用浅水水箱作为阻尼器的大连国贸大厦减振控制研究
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摘要
针对一实际工程结构—大连国贸大厦,研究了风荷载作用下调液阻尼器的减振控制作用。首先建立了该结构的简化计算模型,利用Davenport谱给出了模拟风荷载;在大厦所处的位置进行多次测量,得到实际风速样本,选取其中风速较大、过程平稳的样本,对实测样本与模拟样本的频谱进行比较,验证了模拟风荷载的合理性。文中在大厦顶层设置浅水水箱,将其设计成可减少结构位移及加速度反应的控制装置TLD,以提高大厦在风荷载作用下的舒适度,并给出了高层建筑水箱减振方案实施的设计建议。数值计算结果表明,该大厦顶部设置TLD减振装置后,能有效地控制结构在风荷载作用下的反应。依据本文的TLD设计步骤,可供类似高层建筑进行TLD减小风振控制分析和设计时参考。
This paper studies wind-induced vibration control of Dalian International Trade Center using tuned liquid dampers.First,the simplified model of the structure was established and wind load was simulated by Davenport wind model according to the engineering condition.The actual samples of wind speed were obtained at the position of the building.The frequency spectrum of simulated wind load was compared with the one of measured,which verified the correctness of the simulated wind load.There is a water tank on the top of the building for daily use,so it can be designed to be shallow water tank and used as tuned liquid damper(TLD) to reduce structural response of displacement and acceleration.According to the numerical results of different cases,the optimal parameters of TLD was given.The results showed that TLD can reduce the structural response of the building and enhance the comfortableness of the building.
This paper studies wind-induced vibration control of Dalian International Trade Center using tuned liquid dampers.First,the simplified model of the structure was established and wind load was simulated by Davenport wind model according to the engineering condition.The actual samples of wind speed were obtained at the position of the building.The frequency spectrum of simulated wind load was compared with the one of measured,which verified the correctness of the simulated wind load.There is a water tank on the top of the building for daily use,so it can be designed to be shallow water tank and used as tuned liquid damper(TLD) to reduce structural response of displacement and acceleration.According to the numerical results of different cases,the optimal parameters of TLD was given.The results showed that TLD can reduce the structural response of the building and enhance the comfortableness of the building.
引文
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[2]李宏男,闫石,林皋.智能结构控制发展综述[J].地震工程与工程振动,1999,19(12):29-36.(LIHong-nan,YAN Shi,LIN Gao.State-of-the-art re-viewfor intelligent structural control[J].EarthquakeEngineering and Engineering Vibration,1999,19(12):29-36.(in Chinese))
[3]LI H N,JIA Y,LU J.Si mulation of dynamic liquidpressure for tuned liquid damper[J].ASCE Journalof Engineering Mechanics,2000,126(12):1303-1305.
[4]李宏男,闫石,贾连光.利用调液阻尼器减振的结构控制研究进展[J].地震工程与工程振动,1995,15(3):99-110.(LI Hong-nan,YAN S,JIA Lian-guang.Review of current researches on structural vibrationcontrol by using turned liquid damper[J].EarthquakeEngineering and Engineering Vibration,1995,15
(3):99-110.(in Chinese))
[5]SOONG T T,DARGUSH G F.Passive Energy Dis-sipation Systems in Structural Engineering[M].New York:John Wiley&Sons,Inc,1997.
[6]LI H N,JIA Y,Wang S Y.Theoretical and experi-mental studies on reduction for multi-modal seismicresponses of high-rise structures by tuned liquiddampers[J].Journal of Vibration and Control,2004,10(7):1041-1056.
[7]TAMURA Y,FUJII K,OHTSUKI T.Effectivenessof tuned liquid dampers under wind excitation[J].Engineering Structures,1995,17(9):609-621.
[8]孙焕纯,曲乃泗,林家浩.高等计算结构动力学[M].大连:大连理工大学出版社,1992.(SUN Huan-chun,QU Nai-si,LIN Jia-hao.Computational StructuralDynamics for high education[M].Dalian,Press ofDalian University of Technology,1992.(in Chinese))
[9]LI Y L,LIAO H L,QIANG S Z.Si mplifying thesi mulation of stochastic wind velocity fields for longcable-stayed bridges[J].Computers&Structures,2004,82:1591-1598.
[10]SUN L M,FUJINO Y,PACHECO B M.Nonlinearwaves and dynamic pressures in rectangular tunedliq-uid damper:si mulation and experi mental verification[J].Struct Engrg/Earthquake Engrg JSCE,1989,6(2):251-262.
[11]FUJINO Y,SUN L M,PACHECO B M.Tuned liq-uid damper(TLD)for suppressing horizontal motionof structures[J].J Engrg Mech,1992,118(10):2017-2030.
[12]SUN L M,FUJINO Y,KOGA K.A model of tunedliquid damper for suppressing pitching motions ofstructures[J].Earthquake Engrg Struct Dynamics,1995,24(2):625-636.
[13]王肇民.高耸结构振动控制[M].上海:同济大学出版社,1997.(WANG Zhang-min.Highrise StructuralVibration Control[M].Shanghai:Tongji UniversityPress,1997.(in Chinese))
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