远场长周期地震动下高层摩擦摆基础隔震结构的减震性能
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摘要
高层摩擦摆基础隔震结构在远场长周期地震动长持时的长周期成份作用下,尤其是类谐波成份作用下,隔震层上部结构的减震性能将可能无法得到保证,且摩擦摆支座亦可能产生超限变形。为此,远场长周期地震动作用下高层摩擦摆基础隔震结构的减震性能需进一步探讨。通过一幢框架-核心筒高层摩擦摆基础隔震结构的非线性地震响应分析,揭示远场长周期地震动,尤其是在类谐和长周期地震动下框架-核心筒高层摩擦摆基础隔震结构的地震响应规律。提出在隔震层增设黏滞阻尼器对结构的地震响应进行控制。结果表明:摩擦摆隔震不能满足结构在远场类谐和长周期地震动作用的减震要求,而且还将放大其作用下结构的非线性响应;组合隔震结构能较有效地控制长周期地震动、特别是远场类谐和长周期地震作用下隔震层上部结构以及隔震层的弹塑性地震响应,尤其可显著减小隔震支座的最大变形,使其不超越隔震支座的容许变形值。
The shock absorption performance of the upper structure above the isolation layer may not be guaranteed when the base-isolated high-rise structures using friction pendulums were subjected to far-field long-period ground motions featured by long duration and low frequency components,especially harmonic-alike components. The deformation of friction pendulum bearing may also exceed the allowed limit,resulting in the isolation layer destruction. To this end,the shock absorption performance of base-isolated high-rise structures using friction pendulums subjected to far-field long-period ground motions should be further explored. By nonlinear seismic response analysis of a frame-core tube base-isolated high-rise structure using friction pendulums,the impacts of far-field long-period ground motions,especially harmonic-alike components on the seismic response law were revealed. Viscous dampers were proposed to add in the isolation layer to control the seismic response. The results show that friction pendulum isolation can not meet the shock absorption requirements of structures subjected to far-field harmonic-alike long-period earthquakes,and will enlarge the nonlinear response of structures. Further,the combined isolation can effectively control the nonlinear seismic response of the upper structure above the isolation layer and the isolation layer when subjected to far-field long-period ground motions,especially harmonic-alike components. The maximum deformation of the isolation bearings is reduced so that it does not exceed the allowable deformation value of the isolation bearing.
The shock absorption performance of the upper structure above the isolation layer may not be guaranteed when the base-isolated high-rise structures using friction pendulums were subjected to far-field long-period ground motions featured by long duration and low frequency components,especially harmonic-alike components. The deformation of friction pendulum bearing may also exceed the allowed limit,resulting in the isolation layer destruction. To this end,the shock absorption performance of base-isolated high-rise structures using friction pendulums subjected to far-field long-period ground motions should be further explored. By nonlinear seismic response analysis of a frame-core tube base-isolated high-rise structure using friction pendulums,the impacts of far-field long-period ground motions,especially harmonic-alike components on the seismic response law were revealed. Viscous dampers were proposed to add in the isolation layer to control the seismic response. The results show that friction pendulum isolation can not meet the shock absorption requirements of structures subjected to far-field harmonic-alike long-period earthquakes,and will enlarge the nonlinear response of structures. Further,the combined isolation can effectively control the nonlinear seismic response of the upper structure above the isolation layer and the isolation layer when subjected to far-field long-period ground motions,especially harmonic-alike components. The maximum deformation of the isolation bearings is reduced so that it does not exceed the allowable deformation value of the isolation bearing.
引文
[1]李春峰,张旸.长周期地震动衰减关系研究的迫切性[J].地震地磁观测与研究,2006,27(2):1-7.LI Chunfeng,ZHANG Yang. Urgency of the study of long-period ground motion[J]. Seismological and Geomagnetic Observation and Research,2006,27(2):1-7.(in Chinese)
[2]中日联合考察团,周福霖,崔鸿超,等.东日本大地震灾害考察报告[J].建筑结构,2012(4):1-20.ZHOU Fulin,CUI Hongchao. Inspection report of the disaster of the East Japan earthquake by Sino-Japanese joint mission[J]. Building Structure,2012(4):1-20.(in Chinese)
[3] CHEN K C,WANG J H,HUANG B S,et al. Vibrations of the TAIPEI 101 skyscraper caused by the 2011 Tohoku earthquake,Japan[J]. Earth,Planets and Space,2012,64(12):23.
[4] Ariga T,Kanno Y,Takewaki I. Resonant behavior of base-isolated high-rise buildings under long-period ground motions[J]. Structural Design of Tall&Special Buildings,2006,15(3):325-338.
[5] PANT D R. Influence of near-fault ground motions on the response of base-isolated reinforced concrete buildings considering seismic pounding[J].Advances in Structural Engineering,2013,16(12):1973-1988.
[6]王亚楠,杜永峰,胡高兴,等.远场地震动长周期特性对基础隔震结构地震响应影响研究[J].世界地震工程,2017,33(4):68-75.WANG Yanan,DU Yongfeng,HU Xiangqi,et al. Influence of long-period characteristics of far-field ground motions on seismic response of baseisolated structures[J]. World Earthquake Engineering,2017,33(4):68-75.(in Chinese)
[7]颜桂云,方艺文,吴应雄.远场长周期地震下层间隔震结构的非线性减震分析[J].振动与冲击,2018,37(4):208-218.YAN Guiyun,FANG Yiwen,WU Yingxiong. Mitigation of nonlinear responses of mid-story isolation structures subjected to far-field long-period ground motions[J]. Journal of Vibration and Shock,2018,37(4):208-218.(in Chinese)
[8]田英侠,胡高兴.基础隔震结构的长周期抗震性能分析[J].工程抗震与加固改造,2018,40(1):20-27.TIAN Yingxia,HU Aaoying. Long period seismic perform-ance analysis of base-isolated structure[J]. Earthquake Resistant Engineering and Retrofitting,2018,40(1):20-27.(in Chinese)
[9] Kitamura H,Tankenake Y,Tamura K. Seismic performance of seismic-isolated building for long-period ground motion and limited performance of seismic isolator[C]∥Analysis and Computation Specialty Conference at Structures Congress. 2008:1-12.
[10]李雪红,王文科,吴迪.长周期地震动的特性分析及界定方法研究[J].振动工程学报,2014,27(5):685-692.LI Xuehong,WANG Wenke,WU Di. The bounded method and characteristic analysis for long-period ground motion[J]. Journal of Vibration Engineering,2014,27(5):685-692.(in Chinese)
[11]吴应雄,王兆樑,祁皑,等.叠层橡胶支座与抗风支座组合隔震反应分析[J].振动与冲击,2014,33(5):149-154.WU Yingxiong,WANG Zhaoliang,QI Ai,et al. Response analysis for a compound isolation structure consisting of laminated rubber bearings and wind-resistant supports[J]. Journal of Vibration and Shock,2014,33(5):149-154.(in Chinese)
[12]杜东升,王曙光,刘伟庆,等.高层建筑组合隔震的设计方法及应用[J].东南大学学报:自然科学版,2010,40(5):1039-1046.DU Dongsheng,WANG Shuguang,LIU Weiqing,et al. Design method and its application in hybrid base-isolation of high-rise buildings[J].Journal of Southeast University:Natural Science Edition,2010,40(5):1039-1046.(in Chinese)
[13]马玉宏,赵桂峰,谭平,deng.基础隔震结构全寿命费用研究[J].地震工程与工程振动,2012,32(5):178-185.MA Yuhong,ZHAO Guifeng,TAN Ping,et al. Research on total life-cycle cost of base-isolated buildings[J]. Earthquake Engineering and Engineering Dynamics,2012,32(5):178-185.(in Chinese)
[2]中日联合考察团,周福霖,崔鸿超,等.东日本大地震灾害考察报告[J].建筑结构,2012(4):1-20.ZHOU Fulin,CUI Hongchao. Inspection report of the disaster of the East Japan earthquake by Sino-Japanese joint mission[J]. Building Structure,2012(4):1-20.(in Chinese)
[3] CHEN K C,WANG J H,HUANG B S,et al. Vibrations of the TAIPEI 101 skyscraper caused by the 2011 Tohoku earthquake,Japan[J]. Earth,Planets and Space,2012,64(12):23.
[4] Ariga T,Kanno Y,Takewaki I. Resonant behavior of base-isolated high-rise buildings under long-period ground motions[J]. Structural Design of Tall&Special Buildings,2006,15(3):325-338.
[5] PANT D R. Influence of near-fault ground motions on the response of base-isolated reinforced concrete buildings considering seismic pounding[J].Advances in Structural Engineering,2013,16(12):1973-1988.
[6]王亚楠,杜永峰,胡高兴,等.远场地震动长周期特性对基础隔震结构地震响应影响研究[J].世界地震工程,2017,33(4):68-75.WANG Yanan,DU Yongfeng,HU Xiangqi,et al. Influence of long-period characteristics of far-field ground motions on seismic response of baseisolated structures[J]. World Earthquake Engineering,2017,33(4):68-75.(in Chinese)
[7]颜桂云,方艺文,吴应雄.远场长周期地震下层间隔震结构的非线性减震分析[J].振动与冲击,2018,37(4):208-218.YAN Guiyun,FANG Yiwen,WU Yingxiong. Mitigation of nonlinear responses of mid-story isolation structures subjected to far-field long-period ground motions[J]. Journal of Vibration and Shock,2018,37(4):208-218.(in Chinese)
[8]田英侠,胡高兴.基础隔震结构的长周期抗震性能分析[J].工程抗震与加固改造,2018,40(1):20-27.TIAN Yingxia,HU Aaoying. Long period seismic perform-ance analysis of base-isolated structure[J]. Earthquake Resistant Engineering and Retrofitting,2018,40(1):20-27.(in Chinese)
[9] Kitamura H,Tankenake Y,Tamura K. Seismic performance of seismic-isolated building for long-period ground motion and limited performance of seismic isolator[C]∥Analysis and Computation Specialty Conference at Structures Congress. 2008:1-12.
[10]李雪红,王文科,吴迪.长周期地震动的特性分析及界定方法研究[J].振动工程学报,2014,27(5):685-692.LI Xuehong,WANG Wenke,WU Di. The bounded method and characteristic analysis for long-period ground motion[J]. Journal of Vibration Engineering,2014,27(5):685-692.(in Chinese)
[11]吴应雄,王兆樑,祁皑,等.叠层橡胶支座与抗风支座组合隔震反应分析[J].振动与冲击,2014,33(5):149-154.WU Yingxiong,WANG Zhaoliang,QI Ai,et al. Response analysis for a compound isolation structure consisting of laminated rubber bearings and wind-resistant supports[J]. Journal of Vibration and Shock,2014,33(5):149-154.(in Chinese)
[12]杜东升,王曙光,刘伟庆,等.高层建筑组合隔震的设计方法及应用[J].东南大学学报:自然科学版,2010,40(5):1039-1046.DU Dongsheng,WANG Shuguang,LIU Weiqing,et al. Design method and its application in hybrid base-isolation of high-rise buildings[J].Journal of Southeast University:Natural Science Edition,2010,40(5):1039-1046.(in Chinese)
[13]马玉宏,赵桂峰,谭平,deng.基础隔震结构全寿命费用研究[J].地震工程与工程振动,2012,32(5):178-185.MA Yuhong,ZHAO Guifeng,TAN Ping,et al. Research on total life-cycle cost of base-isolated buildings[J]. Earthquake Engineering and Engineering Dynamics,2012,32(5):178-185.(in Chinese)