大型LRB基础隔震储罐支座参数优化配置研究
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摘要
铅芯橡胶支座(LRB)参数的优化配置是大型LRB基础隔震储罐设计的关键问题。采用Bouc-Wen模型模拟LRB的非线性力学性能,结合Newmark增量法和龙格库塔积分法求解了隔震储罐非线性动力方程,得到了不同类型场地上大型LRB隔震储罐的地震响应特点和设计参数优化配置规律。研究结果表明:支座隔震频率是影响大型隔震储罐减震效果的主要参数。I类场地上最优隔震频率范围为0.5～5rad/s,II类、III类场地上最优隔震频率范围为2～5rad/s,IV类场地上最优隔震频率范围为1.5～3rad/s。支座屈服强度对储罐地震响应的影响取决于场地类型和隔震频率。在II和III类场地上存在最优屈服强度使得基底剪力最小,且最优屈服强度随隔震频率增大而增大。
The optimal configuration of parameters of LRB is a key step in design of large-scale LRB base isolated storage tank.The Bouc-Wen model was adopted to simulate the non-linear hysteretic characteristics of force-displacement relationship for lead plug rubber bearing(LRB).The dynamic nonlinear equations of motion of isolated storage tank was solved by the Newmark's step-by-step method and Runge-kutta method.The seismic response characteristics and optimal parameters of the large-scale LRB base-isolated storage tank at different sites were investigated.The results indicate that isolation frequency is the primary parameter that affects the isolation effectiveness of the isolated storage tank.The optimal ranges of isolation frequency of large-scale base-isolated storage tank on site I,Site II,Site III and Site IV are 0.5-5rad/s,2-5rad/s,2-5rad/s and 1.5-3rad/s respectively.The influence of the bearing's yield strength on the seismic response of storage tank depends on the site type and isolation frequency.There are optimum yield strength that makes the base shear minimum on Site II and Site III.Further,the optimum yield strength increases as the isolation frequency increases.
The optimal configuration of parameters of LRB is a key step in design of large-scale LRB base isolated storage tank.The Bouc-Wen model was adopted to simulate the non-linear hysteretic characteristics of force-displacement relationship for lead plug rubber bearing(LRB).The dynamic nonlinear equations of motion of isolated storage tank was solved by the Newmark's step-by-step method and Runge-kutta method.The seismic response characteristics and optimal parameters of the large-scale LRB base-isolated storage tank at different sites were investigated.The results indicate that isolation frequency is the primary parameter that affects the isolation effectiveness of the isolated storage tank.The optimal ranges of isolation frequency of large-scale base-isolated storage tank on site I,Site II,Site III and Site IV are 0.5-5rad/s,2-5rad/s,2-5rad/s and 1.5-3rad/s respectively.The influence of the bearing's yield strength on the seismic response of storage tank depends on the site type and isolation frequency.There are optimum yield strength that makes the base shear minimum on Site II and Site III.Further,the optimum yield strength increases as the isolation frequency increases.
引文
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[13][王丽,阎维明,阎贵平.铅芯橡胶支座参数对隔震桥梁动力响应的影响[J].北京工业大学学报.2004,30(3):304-308.WANG Li,YAN Wei-ming,YAN Gui-ping.Effect of the LRB Parameters on the Dynamic Response of Isolated Bridges[J].Journal of BeijingPolytechnic University,2004,30(3):304-308.
[14]张艳红,胡晓.大型渡槽隔震研究[J].水利学报.2005,36(11):1308-1313.ZHANG Yan-hong,HU Xiao.Study on seismic isolation technology for large aqueducts[J].Journal of Hydraulic Engineering,2004,30(3):304-308.
[15]田洁,张俊发,刘云贺.铅芯橡胶支座基础隔震体系参数优化配置研究[J].世界地震工程.2003,19(1):158-163.TIAN Jie,ZHANG Jun-fa,LIU Yun-he.Research on optimum parameters of base-isolated buildings with lead laminated rubber bearings[J].World Information On Earthquake Engineering.2003,19(1):158-163.
[16]Park J,Otsuka H.Optimal yield level of bilinear seismic isolation devices[J].Earthquake Engng.Struct.Dyn,1999,28:941-955.
[2]周锡元,阎维明.建筑结构的隔震、减振和振动控制[J].建筑结构学报.2002,23(2):2-11.]ZHOU Xiyuan,YAN Weiming.Seismic Base Isolation,Energy Dissipation and Vibration Control of Building Structures[J].Journal of BuildingStructures,2002,23(2):2-11.
[3]周福霖.工程结构减震控制[M].北京:地震出版社,1997.ZHOU Fu-lin.Vibration control of engineering structure[M].Beijing:Seismological Rress,1997.
[4]Zayas V A,Low S S.Application of seismic isolation to industrial[J].Pressure Vessels and piping,1995.
[5]Malhotra P K.Method for seismic base isolation of liquid-storage tank[J].Journal of Structural Engineering,1997,123(1):113-116.
[6]Malhotra P K.Seismic strengthening of liquid-storage tanks with energy-dissipating anchors[J].Journal of Structural Engineering.1998,124(4):405-414.
[7]Shrimali M K,Jangid R S.Seismic analysis of base-isolated liquid storage tanks[J].Journal of Sound and Vibration,2004(275):59-75.
[8]Liang Bo,Tang Jia-xiang.Vibration studies of base isolated storage tanks[J].Computers and Structures,1994,52:1051-1059.
[9]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 Jian-gang.Analysis Model of Isolation Control for Elasto Cylindrical Steel Storage Fluid Container[J].Journal of Daqing Petroleum Institu-te,1998,22(3):91-94..
[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 Jian-gang,ZHANG Li,YUAN Zhao-qing.Dynamic characteristic analysis of base isolation for vertical storage tank[J].Earthquake Engi-neering and Engineering Vibration.2001,21(3):140-144.
[11]李扬,李自力,毕静.基底隔震储罐频率特征与减震机理分析研究[J].世界地震工程.2009,25(4):117-124.LI Yang,LI Zili,BI Jing.The study on frequency characteristics and isolation mechanism of isolated liquid storage tanks[J].World EarthquakeEngineering,2009,25(4):117-124.
[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 Jian-gang,HAO Jin-feng,Wang Zhen.Research on the calculation of the mode analysis response spectrum of the seismic base isolationsteel storage tank[J].Journal of Harbin Institute of Technology.2005,37(5):649-651.
[13][王丽,阎维明,阎贵平.铅芯橡胶支座参数对隔震桥梁动力响应的影响[J].北京工业大学学报.2004,30(3):304-308.WANG Li,YAN Wei-ming,YAN Gui-ping.Effect of the LRB Parameters on the Dynamic Response of Isolated Bridges[J].Journal of BeijingPolytechnic University,2004,30(3):304-308.
[14]张艳红,胡晓.大型渡槽隔震研究[J].水利学报.2005,36(11):1308-1313.ZHANG Yan-hong,HU Xiao.Study on seismic isolation technology for large aqueducts[J].Journal of Hydraulic Engineering,2004,30(3):304-308.
[15]田洁,张俊发,刘云贺.铅芯橡胶支座基础隔震体系参数优化配置研究[J].世界地震工程.2003,19(1):158-163.TIAN Jie,ZHANG Jun-fa,LIU Yun-he.Research on optimum parameters of base-isolated buildings with lead laminated rubber bearings[J].World Information On Earthquake Engineering.2003,19(1):158-163.
[16]Park J,Otsuka H.Optimal yield level of bilinear seismic isolation devices[J].Earthquake Engng.Struct.Dyn,1999,28:941-955.
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