内置挡板调谐液体阻尼器对高层结构的地震反应控制研究
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摘要
提出一种新型调谐液体阻尼器——内置横向挡板的调谐液体阻尼器(TLDEB)。通过在普通调谐液体阻尼器(TLD)装置中设置横向挡板,使液体绕流时产生附加阻尼来增强其耗能作用,以改善TLD对高层建筑的减振效果。结合经典势流理论以及能量耗散原理推导了TLDEB的等效位移、附加阻尼比,并对其进行了等效线性化。以某实际高层建筑结构作为算例,通过对地面随机激励和地震波激励的数值仿真来验证TLDEB的减振效果。结果表明:TLDEB可有效地增大结构阻尼,具有比普通TLD更优良的减振控制效果。
A new tuned liquid damper device,tuned liquid damper embedded baffles(TLDEB),was proposed to increase energy dissipation through setting transverse baffles in a common tuned liquid damper(TLD) device.The proposed TLDEB was expected to achieve a better control performance for a high-rise building under earthquakes than an common TLD.The equivalent displacement,additional damping ratio and its equivalent linearization of a TLDEB were formulated by using classic potential-flow theory and principle of energy dissipation.A real high-rise building structure was used as a numerical example to demonstrate the damping effectiveness of the proposed TLDEB system subjected to ground random excitation and earthquake wave excitation.The results indicate that TLDEB is capable of improving the structural damping and it has more excellent damping effectiveness than common TLD.
A new tuned liquid damper device,tuned liquid damper embedded baffles(TLDEB),was proposed to increase energy dissipation through setting transverse baffles in a common tuned liquid damper(TLD) device.The proposed TLDEB was expected to achieve a better control performance for a high-rise building under earthquakes than an common TLD.The equivalent displacement,additional damping ratio and its equivalent linearization of a TLDEB were formulated by using classic potential-flow theory and principle of energy dissipation.A real high-rise building structure was used as a numerical example to demonstrate the damping effectiveness of the proposed TLDEB system subjected to ground random excitation and earthquake wave excitation.The results indicate that TLDEB is capable of improving the structural damping and it has more excellent damping effectiveness than common TLD.
引文
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[2]SOONG T T,DARGUSH G F.Passive Energy Dissi-pation System in Structural Engineering[M].NewYork:John Wiley&Sons,1997.
[3]王肇民.高耸结构振动控制[M].上海:同济大学出版社,1997.WANG Zhao-min.Vibration Control for High-riseStructures[M].Shanghai:Tongji University Press,1997.
[4]NOJI T,YOSHIDA H,TATSUMI E,et al.Study onVibration Control Damper Utilizing Sloshing of Water[J].Journal of Wind Engineering and Industrial Aero-dynamics,1988,37:557-566.
[5]FEDIW A A,ISYUMOV N,VICKERY B J.Perform-ance of a Tuned Sloshing Water Damper[J].Journalof Wind Engineering and Industrial Aerodynamics,1995,57(1/3):237-247.
[6]WARNITCHAI P,PINKAEW T.Modelling of Li-quid Sloshing in Rectangular Tanks with Flow-damp-ening Devices[J].Engineering Structures,1998,20(7):593-600.
[7]KANEKO S,ISHIKAWA M.Modeling of Tuned Liq-uid Damper with Submerged Nets[J].Journal of Pres-sure Vessel Technology,1999,121(3):334-343.
[8]TAIT M J,EL DAMATTY A A,ISYUMOV N,et al.Numerical Flow Models to Simulate Tuned Liq-uid Dampers(TLD)with Slat Screens[J].Journal ofFluids and Structures,2005,20(8):1007-1023.
[9]TAIT M J.Modelling and Preliminary Design of aStructure-TLD System[J].Engineering Structures,2008,30(10):2644-2655.
[10]梁启智,熊俊明.圆柱形二层流体TLD的振动特性分析[J].工程力学,2001,18(1):7-13.LIANG Qi-zhi,XIONG Jun-ming.An Analysis of Os-cillation Characteristics of Two-layer Fluids TLDUsing Circular Cylinder Container[J].EngineeringMechanics,2001,18(1):7-13.
[11]钱稼茹,WARNITCHAI P,丁雄.环形调频液体阻尼器(TLD)的计算模型[J].工程力学,1995,12(4):36-46.QIAN Jia-ru,WARNITCHAI P,DING Xiong.Modelling of Liquid Sloshing in the Annular Regionfor Damper Application[J].Engineering Mechanics,1995,12(4):36-46.
[12]FUJINO Y,PACHECO B M,CHAISERI P,et al.Understanding of TLD Properties Based on TMDAnalogy[J].Journal of Structural Engineering,1990,36:577-590.
[13]哈勒姆M G,黑弗N J,伍顿L R.海洋建筑物动力学[M].侯国本,徐立论,钟礼英,译.北京:海洋出版社,1981.HALLAM M G,HEAF N J,WOOTTON L R.Dy-namics of Marine Structures[M].Translated by HOUGuo-ben,XU Li-lun,ZHONG Li-ying.Beijing:OceanPress,1981.
[14]LAZAN B J,GOODMAN L E.Shock and VibrationHandbook[M].New York:McGraw-Hill,1961.
[15]CAUGHEY T K.Equivalent Linearization Techniques[J].Journal of the Acoustical Society of America,1963,35(11):1706-1711.
[16]李宏男,李忠献,祁皑,等.结构振动与控制[M].北京:中国建筑工业出版社,2005.LI Hong-nan,LI Zhong-xian,QI Ai,et al.StructureVibration and Control[M].Beijing:China Architec-ture&Building Press,2005.
[17]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.LIN Jia-hao,ZHANG Ya-hui.Pseudo-excitationMethod of Random Vibration[M].Beijing:SciencePress,2004.
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