高层工业煤气厂房在多重调谐质量阻尼器与黏滞流体阻尼器共同作用下的地震控制效果分析
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摘要
高层工业煤气厂房在地震作用下振动较为剧烈,故对其在不同地震作用下的振动控制,也成为了当下研究的重点。通过运用ANSYS有限元软件构建了三维高层工业煤气厂房有限元模型。模态分析显示,结构扭转模态出现较早。施加减振措施时,不但对弯曲振动还要对扭转振动加以控制,故对其层间位移、顶层位移加速度及角加速度进行振动控制分析。为此,在结构上分别加设钢支撑、多重调谐质量阻尼器(MTMD)、黏滞流体阻尼器及MTMD与黏滞流体阻尼器混合单元后,施加地震作用,进行动力时程对比分析,进而研究4种减振措施对地震控制效果的有效性。结果表明:多数情况下,运用MTMD与黏滞流体阻尼器混合单元进行控制效果较好。
Under the action of earthquake,the vibration of a high-rise industrial gas building is relatively severe.So the study of vibration control under different earthquake action has become more and more important.In this paper,a finite element model of the structure was established,and the modal analysis results showed that torisonal vibration frequency was low and occurred easily.So the torsionsal and bending vibrations of the structure need to be controlled.Therefore,vibration control under interlayer drift,displacement and angle accelerations of top layer was analyzed;and steel support,fluid viscous damper,multiple tuned mass dampers(MTMD),the mixed element of fluid viscous damper and MTMD were installed respectively on the structure,to which seismic loads were applied,which could study the effectiveness of the control effect of the four kinds of measures.The results showed that in most of cases the control effect of the mixed element was better then others.
Under the action of earthquake,the vibration of a high-rise industrial gas building is relatively severe.So the study of vibration control under different earthquake action has become more and more important.In this paper,a finite element model of the structure was established,and the modal analysis results showed that torisonal vibration frequency was low and occurred easily.So the torsionsal and bending vibrations of the structure need to be controlled.Therefore,vibration control under interlayer drift,displacement and angle accelerations of top layer was analyzed;and steel support,fluid viscous damper,multiple tuned mass dampers(MTMD),the mixed element of fluid viscous damper and MTMD were installed respectively on the structure,to which seismic loads were applied,which could study the effectiveness of the control effect of the four kinds of measures.The results showed that in most of cases the control effect of the mixed element was better then others.
引文
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[2](日)背户一登.结构振动控制[M].马立新,李孜,译.北京:机械工业出版社,2012:23-27.
[3]秦丽,李业学,徐福卫.TMD对结构地震响应控制效果的研究[J].世界地震工程,2010:203-204.
[4]Den H,Jacob P.Mechanical Vibrations[M].New York:Mc Graw-Hill,1956.
[5]Warburton G B,Ayorinde E O.Optimal Absober Parameters for Various Combinations of Response and Exciation Parameters[J].Earthquake Engineering and Structural Dynamics,1982,10(3):381-401.
[6]Tsai H C,Lin G C.Optimum Tuned-Mass Dampers Form in SteadyState Response of Support-Excited and Damped Structure[J].Earthquake Engineer and Structure Dynamics,1993:957-973.
[7]Sladek J R,Klingner R E.Effect of Tuned-Mass Dampers on Seismic Response[J].Journal of Structural Engineering,1983,109(8):2004-2009.
[8]Li Chunxiang,Xiong Xueyu.Estimation of Active Multipe Tuned Mass Dampers for Asymmetric Structures[J].Engineering and Mechanics,2008,29(5):505-530.
[9]JGJ 3—2002高层建筑混凝土结构技术规程[S].
[10]包陈,王呼佳,陈洪军,等.ANASYS工程分析进阶实例(修订版)[M].北京:中国水利水电出版社,2009:136-175.
[11]Cai G P,Sun F.Characterristic Analysis of MTMD for Seismically Excited Structures[J].Engineering Mechanics,2000:55-59.
[12]欧进萍.耗能减振结构的抗震分析与设计方法[J].Journal of Vibration Engineering,1999,7(1):37-42.
[13]王丹丹.煤气化高层工业厂房的建模分析与消能减振设计[D].焦作:河南理工大学,2012:26-39.
[14]冯启明,焦双键,刘艳林.钢筋混凝土框架结构地震破坏的研究[J].地震工程与工程振动,2002(3):61-65.
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