近断层地震动作用下LRB隔震储罐地震反应特征研究
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摘要
采用Bouc-Wen模型模拟铅芯橡胶支座(LRB)非线性力学性能,建立LRB基础隔震储罐地震反应的数值模型。利用叠加原理得到人工合成近断层脉冲型地震动,从实际典型近断层地震动和人工近断层脉冲地震动输入两个角度出发,以远场地震反应为参照,系统探讨了近断层地震动作用下LRB隔震储罐地震反应特点以及近断层地震动运动特征的影响规律。研究发现,近断层地震动作用下LRB隔震储罐地震反应明显大于远场地震反应值,显著的近断层脉冲效应是隔震储罐设计不容忽视的问题。近断层地震动的PGV/PGA值是决定隔震储罐地震反应的综合指标,PGV/PGA值较大时,隔震储罐地震反应脉冲效应突出。另外,脉冲周期、脉冲参与系数以及脉冲类型也是影响LRB隔震储罐地震反应的重要因素。在脉冲参与系数越大、含有脉冲数量越多的近断层地震动作用下,隔震储罐地震反应越强烈。当脉冲周期接近储罐晃动周期时,晃动波高会出现峰值。
Analytical mechanical model for lead rubber bearing(LRB) base-isolated liquid storage tank is established.The Bouc-Wen model is adopted to simulate the non-linear hysteretic characteristics of force-displacement relationship for LRB.Artificially generated near-fault ground motions(NF) are obtained on the basis of superposition principle.The seismic responses and main influence factors of LRB base-isolated storage tank under actual near-fault ground motions and artificially generated NF ground motions are investigated in comparison with the results of far-field ground motions.The result shows the seismic responses of base-isolated tank subjected to near fault ground motion is much greater than that under far-field excitation due to pulse-like effect.The effect of pulselike of NF ground motion can’t be neglected in the design of base-isolated storage tank.It is found that the PGV / PGA of NF ground motion is an important index to determine the seismic responses,which are drastic for larger PGV / PGA.The pulse period,pulse contributing factor and pulse types are the main parameters that dramatically affect the response characteristics of base-isolated tank.The seismic responses of storage tank are more fierce,if the NF ground motions have larger pulse contributing factor and large amount of puls.The seismic responses of storage tank reach their maximum when the pulse period is close to the sloshing period of tank.
Analytical mechanical model for lead rubber bearing(LRB) base-isolated liquid storage tank is established.The Bouc-Wen model is adopted to simulate the non-linear hysteretic characteristics of force-displacement relationship for LRB.Artificially generated near-fault ground motions(NF) are obtained on the basis of superposition principle.The seismic responses and main influence factors of LRB base-isolated storage tank under actual near-fault ground motions and artificially generated NF ground motions are investigated in comparison with the results of far-field ground motions.The result shows the seismic responses of base-isolated tank subjected to near fault ground motion is much greater than that under far-field excitation due to pulse-like effect.The effect of pulselike of NF ground motion can’t be neglected in the design of base-isolated storage tank.It is found that the PGV / PGA of NF ground motion is an important index to determine the seismic responses,which are drastic for larger PGV / PGA.The pulse period,pulse contributing factor and pulse types are the main parameters that dramatically affect the response characteristics of base-isolated tank.The seismic responses of storage tank are more fierce,if the NF ground motions have larger pulse contributing factor and large amount of puls.The seismic responses of storage tank reach their maximum when the pulse period is close to the sloshing period of tank.
引文
[1]Bray J D,Rodriguez-Marek A.Characterization of forward-directivity ground motions in the near-fault Region[J].Soil Dynamics and EarthquakeEngineering,2004,24(5):815-828.
[2]Loh C H,Wan S,Liao W I.Effects of hysteretic model on seismic demands:consideration of near-fault ground motions[J].The Structural De-sign of Tall Buildings,2002,11(1):155-169.
[3]李新乐,朱晞.近断层地震速度脉冲效应对桥墩地震反应的影响[J].北方交通大学学报,2004,28(1):11-6.LI Xinle,ZHU Xi.Velocity pulse for near-fault ground motions and its effect on seismic response of pier[J].Journal of Northern Jiaotong Universi-ty,2004,28(1):11-6.(in Chinese)
[4]卢明奇,田玉基,杨庆山.近断层地震作用下高层建筑结构地震响应分析[J].哈尔滨工业大学学报,2007,39(2):314-317.LU Mingqi,TIAN Yuji,YANG Qingshan.Analysis of seismic response of high-rise building to near-fault ground motions[J].Journal of Harbin In-stitute of Technology,2007,39(2):314-317.(in Chinese).
[5]刘启方,袁一凡,金星.近断层地震动的基本特征[J].地震工程与工程振动,2006,26(1):1-10.LIU Qifang,YUAN Yifan,JIN Xing.Basic characteristics of near-fault ground motion[J].Journal of Earthquake Engineering and Engineering Vi-bration,2006,26(1):1-10.(in Chinese)
[6]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[7]孙建刚.弹性圆柱钢制储液容器橡胶基底隔震分析模型[J].大庆石油学院学报.1998,22(3):91-94.SUN Jiangang.Analysis model of isolation control for elasto cylindrical steel storage fluid container[J].Journal of Daqing Petroleum Institute,1998,22(3):91-94(in Chinese).
[8]孙建刚,崔利富.立式浮顶储罐基础隔震地震响应研究[J].哈尔滨工业大学学报,2011,43(8):140-144.SUN Jiangang,CUI Lifu.Study on the seismic responses of vertical floating roof storage tanks with the base isolation[J].Journal of Harbin Instituteof Technology,2011,43(8):140-144.(in Chinese)
[9]孙建刚,崔利富,赵长军.15×104m3立式储罐隔震设计分析[J].地震工程与工程振动,2010,30(4):153-158.(in Chinese)SUN Jiangang,CUI Lifu,ZHAO Changjun.Design and analysis of seismic isolation for 15×104m3 vertical storage tank[J].Journal of EarthquakeEngineering and Engineering Vibration,2010,30(4):153-158.(in Chinese)
[10]孙建刚,张丽,袁朝庆.立式储罐基础隔震动力反应特性分析[J].地震工程与工程振动,2001,21(3):140-144.SUN Jiangang,ZHANG Li,YUAN Zhaoqing.Dynamic characteristic analysis of base isolation for vertical storage tank[J].Journal of EarthquakeEngineering and Engineering Vibration,2001,21(3):140-144.(in Chinese)
[11]Shrimali M K,Jangid R S.Seismic analysis of base-isolated liquid storage tanks[J].Journal of Sound and Vibration,2004(275):59-75.
[12]孙建刚,郝进锋,王振.储罐基底隔震振型分解反应谱计算分析研究[J].哈尔滨工业大学学报,2005,37(5):649-651.SUN Jiangang,HAO Jinfeng,Wang Zhen.Research on the calculation of the mode analysis response spectrum of the seismic base isolation steelstorage tank[J].Journal of Harbin Institute of Technology,2005,37(5):649-651.(in Chinese)
[13]李扬,李自力,张艳.铅芯橡胶支座隔震储罐地震响应特性分析[J].工程抗震与加固改造,2009,37(5):39-45.LI Yang,LI Zili,ZHANG Yan.Response characteristic of liquid storage tank isolated by lead rubber bearings[J].Earthquake Resistant Engineer-ing and Retrofitting.2009,37(5):39-45.(in Chinese)
[14]李自力,李扬,李洪波.大型LRB隔震储罐地震反应参数研究[J].四川大学学报:工程科学版,2010,42(5):134-141.LI Zili,LI Yang,LI Hongbo.Parametric research on seismic response of large scale liquid storage tank isolated by lead-rubber bearings[J].Jour-nal of Sichuan University(Engineering Science Edition),2010,42(5):134-141.(in Chinese)
[15]王建强,王利娟.铅芯叠层橡胶支座恢复力模型研究[J].世界地震工程,2005,21(2):151-154.WANG Jianqiang,WANG Lijuan.Study on restoring force model of a lead rubber bearing[J].World Information on Earthquake Engineering.2005,21(2):151-154.(in Chinese)
[16]Makris N,Roussos Y.Rocking response and overturning of equipment under horizontal pulse-type motion[R].PEER Report 1998-5,College ofEngineering University of California,Berkeley,October,1998.
[17]Lu L Y,Shih M H.Seismic performance of sliding isolated structures in near fault areas[C]//Seventh U.S.National Conference on EarthquakeEngineering,Boston,No.00356:2002.
[18]Mavroeidis G P,Papageorgiou A S.Nearsource strong ground motion:characteristics and design issues[C]//Seventh U.S.National Conferenceon Earthquake Engineering,Boston,No.00240:2002.
[2]Loh C H,Wan S,Liao W I.Effects of hysteretic model on seismic demands:consideration of near-fault ground motions[J].The Structural De-sign of Tall Buildings,2002,11(1):155-169.
[3]李新乐,朱晞.近断层地震速度脉冲效应对桥墩地震反应的影响[J].北方交通大学学报,2004,28(1):11-6.LI Xinle,ZHU Xi.Velocity pulse for near-fault ground motions and its effect on seismic response of pier[J].Journal of Northern Jiaotong Universi-ty,2004,28(1):11-6.(in Chinese)
[4]卢明奇,田玉基,杨庆山.近断层地震作用下高层建筑结构地震响应分析[J].哈尔滨工业大学学报,2007,39(2):314-317.LU Mingqi,TIAN Yuji,YANG Qingshan.Analysis of seismic response of high-rise building to near-fault ground motions[J].Journal of Harbin In-stitute of Technology,2007,39(2):314-317.(in Chinese).
[5]刘启方,袁一凡,金星.近断层地震动的基本特征[J].地震工程与工程振动,2006,26(1):1-10.LIU Qifang,YUAN Yifan,JIN Xing.Basic characteristics of near-fault ground motion[J].Journal of Earthquake Engineering and Engineering Vi-bration,2006,26(1):1-10.(in Chinese)
[6]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[7]孙建刚.弹性圆柱钢制储液容器橡胶基底隔震分析模型[J].大庆石油学院学报.1998,22(3):91-94.SUN Jiangang.Analysis model of isolation control for elasto cylindrical steel storage fluid container[J].Journal of Daqing Petroleum Institute,1998,22(3):91-94(in Chinese).
[8]孙建刚,崔利富.立式浮顶储罐基础隔震地震响应研究[J].哈尔滨工业大学学报,2011,43(8):140-144.SUN Jiangang,CUI Lifu.Study on the seismic responses of vertical floating roof storage tanks with the base isolation[J].Journal of Harbin Instituteof Technology,2011,43(8):140-144.(in Chinese)
[9]孙建刚,崔利富,赵长军.15×104m3立式储罐隔震设计分析[J].地震工程与工程振动,2010,30(4):153-158.(in Chinese)SUN Jiangang,CUI Lifu,ZHAO Changjun.Design and analysis of seismic isolation for 15×104m3 vertical storage tank[J].Journal of EarthquakeEngineering and Engineering Vibration,2010,30(4):153-158.(in Chinese)
[10]孙建刚,张丽,袁朝庆.立式储罐基础隔震动力反应特性分析[J].地震工程与工程振动,2001,21(3):140-144.SUN Jiangang,ZHANG Li,YUAN Zhaoqing.Dynamic characteristic analysis of base isolation for vertical storage tank[J].Journal of EarthquakeEngineering and Engineering Vibration,2001,21(3):140-144.(in Chinese)
[11]Shrimali M K,Jangid R S.Seismic analysis of base-isolated liquid storage tanks[J].Journal of Sound and Vibration,2004(275):59-75.
[12]孙建刚,郝进锋,王振.储罐基底隔震振型分解反应谱计算分析研究[J].哈尔滨工业大学学报,2005,37(5):649-651.SUN Jiangang,HAO Jinfeng,Wang Zhen.Research on the calculation of the mode analysis response spectrum of the seismic base isolation steelstorage tank[J].Journal of Harbin Institute of Technology,2005,37(5):649-651.(in Chinese)
[13]李扬,李自力,张艳.铅芯橡胶支座隔震储罐地震响应特性分析[J].工程抗震与加固改造,2009,37(5):39-45.LI Yang,LI Zili,ZHANG Yan.Response characteristic of liquid storage tank isolated by lead rubber bearings[J].Earthquake Resistant Engineer-ing and Retrofitting.2009,37(5):39-45.(in Chinese)
[14]李自力,李扬,李洪波.大型LRB隔震储罐地震反应参数研究[J].四川大学学报:工程科学版,2010,42(5):134-141.LI Zili,LI Yang,LI Hongbo.Parametric research on seismic response of large scale liquid storage tank isolated by lead-rubber bearings[J].Jour-nal of Sichuan University(Engineering Science Edition),2010,42(5):134-141.(in Chinese)
[15]王建强,王利娟.铅芯叠层橡胶支座恢复力模型研究[J].世界地震工程,2005,21(2):151-154.WANG Jianqiang,WANG Lijuan.Study on restoring force model of a lead rubber bearing[J].World Information on Earthquake Engineering.2005,21(2):151-154.(in Chinese)
[16]Makris N,Roussos Y.Rocking response and overturning of equipment under horizontal pulse-type motion[R].PEER Report 1998-5,College ofEngineering University of California,Berkeley,October,1998.
[17]Lu L Y,Shih M H.Seismic performance of sliding isolated structures in near fault areas[C]//Seventh U.S.National Conference on EarthquakeEngineering,Boston,No.00356:2002.
[18]Mavroeidis G P,Papageorgiou A S.Nearsource strong ground motion:characteristics and design issues[C]//Seventh U.S.National Conferenceon Earthquake Engineering,Boston,No.00240:2002.
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