基于等效层模型的静动力抗震分析及其在剪力墙减震设计中的应用
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摘要
以某高层剪力墙结构为工程背景,基于等效层模型,将静力弹塑性方法与非线性时程分析方法相结合,对结构进行了消能减震分析。首先对结构三维空间模型进行了静力弹塑性分析,得到了结构的层间恢复力曲线。在此基础上,根据能量相等原则确定了等效三线型恢复力模型,建立了结构等效弹塑性层模型,进行了弹塑性时程分析,并研究了非线性粘滞流体阻尼器对高层剪力墙结构在罕遇地震作用下反应的振动控制。分别对减震前后剪力墙结构在EL CENTRO波、唐山波和人工波作用下的整体反应进行了分析和评估。研究结果表明,采用静动力综合抗震分析方法对结构弹塑性等效层模型进行时程分析可以用于评估结构的弹塑性整体抗震性能,为工程设计提供参考;采用粘滞流体阻尼器可以明显减小高层剪力墙结构在罕遇地震作用下的反应,使得层间位移满足《建筑抗震设计规范》的要求,该方法可为类似结构的减震设计提供借鉴。
A high-rise shear wall structure is analyzed according to the proposed combination method of static elastic-plastic analysis and nonlinear time history analysis based on equivalent storey model.Firstly,static elastic-plastic method is applied to the three-dimension finite element model of structure and the storey restoring force curves are obtained.On the basis of equivalent energy principle,the equivalent three-linear restoring force model and the equivalent elastic-plastic storey model are established,the shear wall structure is calculated by the elastic-plastic time history method and the vibration reduction analysis of structure with nonlinear viscous fluid damper under rarely earthquake is studied.The whole earthquake responses of shear wall structure with and without energy dissipation devices due to EL CENTRO,Tangshan and artificial seismic wave are investigated and evaluated respectively.The researches show that the time history method based on equivalent elastic-plastic storey model can be applied to evaluate the whole earthquake resistant performance of structure and provide a reference for engineering design,the responses of high-rise shear wall structure under major earthquake are decreased significantly and the storey drifts satisfy the requirement of "code for seismic design of buildings" by using viscous fluid damper.The method in this paper can be utilized for the analysis of similar projects.
A high-rise shear wall structure is analyzed according to the proposed combination method of static elastic-plastic analysis and nonlinear time history analysis based on equivalent storey model.Firstly,static elastic-plastic method is applied to the three-dimension finite element model of structure and the storey restoring force curves are obtained.On the basis of equivalent energy principle,the equivalent three-linear restoring force model and the equivalent elastic-plastic storey model are established,the shear wall structure is calculated by the elastic-plastic time history method and the vibration reduction analysis of structure with nonlinear viscous fluid damper under rarely earthquake is studied.The whole earthquake responses of shear wall structure with and without energy dissipation devices due to EL CENTRO,Tangshan and artificial seismic wave are investigated and evaluated respectively.The researches show that the time history method based on equivalent elastic-plastic storey model can be applied to evaluate the whole earthquake resistant performance of structure and provide a reference for engineering design,the responses of high-rise shear wall structure under major earthquake are decreased significantly and the storey drifts satisfy the requirement of "code for seismic design of buildings" by using viscous fluid damper.The method in this paper can be utilized for the analysis of similar projects.
引文
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[2]郑正昌,森高英夫,下田郁夫.鹿儿岛机场候机楼抗震补强—增设粘滞阻尼墙的结构三维弹塑性分析[J].建筑结构,2000,30(6):19—22.Jeing J C,Hideo Moritaka,Ikuo Shimoda.Kagoshimaairport terminal building seismic retrofit-3dinelastic a-nalysis of structure with viscous damper system[J].Building Structure,2000,30(6):19—22.
[3]方鄂华,何国松,容柏生,等.广州天王中心大厦弹塑性地震反应分析[J].建筑结构学报,2000,21(6):10—15.Fang Ehua,He Guosong,Rong Baisheng,et al.Elas-toplastic seismic analysis of Tian Wang center tower[J].Journal of Building Structures,2000,21(6):10—15.
[4]杨志勇,何若全.高层钢结构弹塑性抗震分析静动力综合法[J].建筑结构学报,2003,24(3):25—32.Yang Zhiyong,He Ruoquan.Inelastic static-dynamicanalysis method of high-rise steel structures underearthquake action[J].Journal of Building Structures,2003,24(3):25—32.
[5]李爱群.工程结构减振控制[M].北京:机械工业出版社,2007.
[6]日本隔震结构协会编.被动减震结构设计施工手册(原著第2版)[M].蒋通,译.北京:中国建筑工业出版社,2008.
[7]Hwang H,Jaw J W.Seismic performance assessmentof code-designed structures[R].NCEER-88-0007.
[8]Milev J I.Two Dimensional analytical model of rein-forced concrete shear walls[A].11th WCEE[C],Mexico,1996.
[9]Constantinon M C,Symans M D.Experimental andanalytical investigation of seismic response of struc-tures with supple mental fluid viscous damper[R].NSEER Rep-92-0032,State Univ of New York at Baf-falo,New York,1992.
[10]中华人民共和国住房和城乡建设部.建筑抗震设计规范[S](GB50011-2010).北京:中国建筑工业出版社,2010.Ministry of Housing and Urban-Rural Development ofthe People’s Republic of China.Code for seismic de-sign of buildings[S](GB50011-2010).Beijing:ChinaArchitecture and Building Press,2010.
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