设置黏滞阻尼器的连体高层结构的减振研究
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摘要
研究采用阻尼器对连体高层结构的地震响应进行振动控制。首先从结构动力方程出发,推导了在主塔与连廊之间设置有黏滞阻尼器的有控结构的基本振动控制方程;进而通过数值模拟,以某实际工程为原型,尝试将连廊与主塔间的斜撑利用黏滞阻尼器进行替换,分别在不同地震激励下比较了有控结构和无控结构的地震响应。分析结果表明,采用黏滞阻尼器可以有效降低结构的层剪力、结构位移、加速度等地震响应;同时能量分析的结果也表明本文采用的减振方案在不同地震激励下都可以有效耗散地震能量,由此得出结论采用黏滞阻尼器提高连体高层结构的抗震安全性是可行的。
Viscous damper is introduced to connected high-rise structure to reduce its seismic responses. The basic control equations of connected structure with viscous dampers installed between main towers and corridor are first derived from equations of motion. And then a numerical example taken from certain real project is analyzed,from which the tilted bracings are replaced by viscous dampers. The seismic responses of controlled and uncontrolled structures under different earthquake excitations are compared through numerical simulation. The results show that viscous damper can effectively reduce the shear force,displacement and acceleration responses. And also the energy analysis results indicate that the control scheme adopted in this simulation can effectively dissipate earthquake energy,and thus conclusions are drawn that using viscous damper can effectively increase the aseismic ability of connected high-rise structure.
Viscous damper is introduced to connected high-rise structure to reduce its seismic responses. The basic control equations of connected structure with viscous dampers installed between main towers and corridor are first derived from equations of motion. And then a numerical example taken from certain real project is analyzed,from which the tilted bracings are replaced by viscous dampers. The seismic responses of controlled and uncontrolled structures under different earthquake excitations are compared through numerical simulation. The results show that viscous damper can effectively reduce the shear force,displacement and acceleration responses. And also the energy analysis results indicate that the control scheme adopted in this simulation can effectively dissipate earthquake energy,and thus conclusions are drawn that using viscous damper can effectively increase the aseismic ability of connected high-rise structure.
引文
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[4]陈学伟,韩小雷,毛贵牛,等.黏滞阻尼器在连体高层结构中的抗风减振效果[J].土木建筑与环境工程,2009,31(5):74-79.CHEN Xuewei,HAN Xiaolei,MAO Guiniu,et al.Wind-induced response analysis on a connected tall building structure with viscous damper[J].Journal of Civil,Architectural&Environmental Engineering,2009,31(5):74-79.(in Chinese)
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[6]Abdel-Rohman M,John M J,Hassan M F.Compensation of time delay effect in semi-active controlled suspension bridges[J].Journal of Vibration and Control,2010,16(10):1527-1558.
[7]黄克华.阻尼器在连体结构中的振动控制作用研究[J].四川建筑科学研究,2008,34(3):158-161.HUANG Kehua.Study on vibration control of dampers used in connected structure[J].Sichuan Building Science,2008,34(3):158-161.(in Chinese)
[8]LIN Wei,LI Zhongxian,DING Yang.Trust-region based instantaneous optimal semi-active control on long-span spatial structure with MRF-04K damper[J].Earthquake Engineering and Engineering Vibration,2008,7(4):447-464.
[9]Loh C H,Chang C M.Application of centralized and decentralized control to building structure:analytical study[J].Journal of Engineering Mechanics,2008,134(11):970-982.
[2]林伟,陈尚鸿,祁皑,等.多维多点激励下大跨度连体高层结构地震反应分析[J].福州大学学报,2011,39(6):923-929.LIN Wei,CHEN Shanghong,QI Ai,et al.Seismic analysis of long-span connected structures under multi-support and multi-dimensional earthquake excitations[J].Journal of Fuzhou University,2011,39(6):923-929.(in Chinese)
[3]陈学伟,韩小雷.中洲中心二期结构抗震性能分析[J].建筑结构学报,2010,31(1):101-109.CHEN Xuewei,HAN Xiaolei.Performance-based seismic design of Zhongzhou PhraseⅡstructure[J].Journal of Building Structures,2010,31(1):101-109.(in Chinese)
[4]陈学伟,韩小雷,毛贵牛,等.黏滞阻尼器在连体高层结构中的抗风减振效果[J].土木建筑与环境工程,2009,31(5):74-79.CHEN Xuewei,HAN Xiaolei,MAO Guiniu,et al.Wind-induced response analysis on a connected tall building structure with viscous damper[J].Journal of Civil,Architectural&Environmental Engineering,2009,31(5):74-79.(in Chinese)
[5]李忠献,林伟,丁阳.多维地震激励下空间结构MR阻尼器半主动控制[J].天津大学学报,2007,40(5):512-518.LI Zhongxian,LIN Wei,DING Yang.Semi-active control on spatial structures using MR damper under multi-dimensional earthquake excitations[J].Journal of Tianjin University,2007,40(5):512-518.(in Chinese)
[6]Abdel-Rohman M,John M J,Hassan M F.Compensation of time delay effect in semi-active controlled suspension bridges[J].Journal of Vibration and Control,2010,16(10):1527-1558.
[7]黄克华.阻尼器在连体结构中的振动控制作用研究[J].四川建筑科学研究,2008,34(3):158-161.HUANG Kehua.Study on vibration control of dampers used in connected structure[J].Sichuan Building Science,2008,34(3):158-161.(in Chinese)
[8]LIN Wei,LI Zhongxian,DING Yang.Trust-region based instantaneous optimal semi-active control on long-span spatial structure with MRF-04K damper[J].Earthquake Engineering and Engineering Vibration,2008,7(4):447-464.
[9]Loh C H,Chang C M.Application of centralized and decentralized control to building structure:analytical study[J].Journal of Engineering Mechanics,2008,134(11):970-982.
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