大型立式浮顶油罐的减震分析研究
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摘要
针对大型立式储罐地震响应和减震措施问题,利用流体力学速度势基本理论,根据储罐储液与罐壁的边界条件,导出了储罐振动的总速度势表达式;考虑浮顶板振动问题,对速度势进行了修正,在此基础上给出了隔震储罐体系的简化力学模型和运动方程,并以10万m3大型储罐为例进行了数值模拟计算。结果表明:大型储罐采用基底隔震装置,上部结构的加速度、基底剪力和弯矩等地震响应明显下降,大型储罐采用隔震技术后,减震效果明显,上部结构可以按低烈度进行设计。
Aiming at earthquake response and damping measures problem of the large vertical storage tanks,the total expression of potential vibration velocity of storage tank is derived,based on the potential velocity theory of fluid mechanics and the boundary conditions between the liquid and the wall of the tank. A velocity potential expression is modified by considering roof vibration. A simplified mechanical model and the corresponding equation of motion of isolation storage tank system are presented. Taking a vertical steel tank of 100000m3 as an example,numerical simulation for the tank is performed. The results show that if base isolation device is applied in the large scale storage tank,the acceleration,the base shear and bending moment etc. are significantly reduced. When the isolation technology is used,damping effect is improved obviously,so the upper structure can be designed according to the low earthquake intensity.
Aiming at earthquake response and damping measures problem of the large vertical storage tanks,the total expression of potential vibration velocity of storage tank is derived,based on the potential velocity theory of fluid mechanics and the boundary conditions between the liquid and the wall of the tank. A velocity potential expression is modified by considering roof vibration. A simplified mechanical model and the corresponding equation of motion of isolation storage tank system are presented. Taking a vertical steel tank of 100000m3 as an example,numerical simulation for the tank is performed. The results show that if base isolation device is applied in the large scale storage tank,the acceleration,the base shear and bending moment etc. are significantly reduced. When the isolation technology is used,damping effect is improved obviously,so the upper structure can be designed according to the low earthquake intensity.
引文
[1]徐致均.大型储罐基础地基处理与工程实例[M].北京:中国标准出版社,2009.
[2]郭骅.美国储液罐地震反应的研究概况[J].地震工程与工程振动,1982,1(3):106-107.
[3]帅健,于桂杰.管道及储罐强度设计[M].北京:石油工业出版社,2006.
[4]潘家华,郭光臣,高锡祺.油罐及管道强度设计[M].北京:石油工业出版社,1986.
[5]袁朝庆,孙建刚,徐松芝.储罐抗震计算模型的简化[J].压力容器,2008,25(4):16-20.
[6]沈利英,沈士明.大型储罐地震动力响应研究综述[J].压力容器,2008,25(9):49-53.
[7]王健.大型储液罐的地震反应初探[J].压力容器,2008,25(6):25-27.
[8]NAKAGAWA K.On the Vibration of an Elevated Water TankⅡ[J].Technical Reports of Osaka University,1955,5(170):317-336.
[9]YAMAMOTO Y.The Liquid Sloshing and the Impulsive Pressures of Oil Storage Tanks due to Earthquakes[J].Journal of High Pressure Institute of Japan,1965,3(1):2-8.
[10]TETSUYA M.Sloshing in a Cylindrical Liquid Storage Tank With a Floating Roof Under Seismic Excitation[J].ASME Journal of Pressure Vessel Technology,2007,129(4):557-566.
[11]TETSUYA M.Sloshing in a Cylindrical Liquid Storage Tank with a Single-Deck Type Floating Roof Under Seismic Excitation[J].Journal of Pressure Vessel Technology,2009,131(021303):1-10.
[12]孙建刚.立式储罐地震响应控制研究[D].北京:中国地震局工程力学研究所,2002.
[13]孙建刚,李德昌,崔利富,等.非线性隔震立式浮顶储罐双向地震作用分析[J].世界地震工程,2011,27(2):70-76.
[14]KELLY J M.Aseismic Base Isolation:Review and Bibliography[J].Soil Dynamics and Earthquake Engineering,1986,(5):202-216.
[15]MEDHAT A H,HANMDY M E.Model for Flexible Tanks Undergoing Roching[J].Journal of Engineering Mechanics,1985,111(2):143-157.
[16]徐英,杨一凡,朱萍.球罐和大型储罐[M].北京:化学工业出版社,2005.
[17]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[18]日本建筑学会.隔震结构设计[M].北京:地震出版社,2006.
[2]郭骅.美国储液罐地震反应的研究概况[J].地震工程与工程振动,1982,1(3):106-107.
[3]帅健,于桂杰.管道及储罐强度设计[M].北京:石油工业出版社,2006.
[4]潘家华,郭光臣,高锡祺.油罐及管道强度设计[M].北京:石油工业出版社,1986.
[5]袁朝庆,孙建刚,徐松芝.储罐抗震计算模型的简化[J].压力容器,2008,25(4):16-20.
[6]沈利英,沈士明.大型储罐地震动力响应研究综述[J].压力容器,2008,25(9):49-53.
[7]王健.大型储液罐的地震反应初探[J].压力容器,2008,25(6):25-27.
[8]NAKAGAWA K.On the Vibration of an Elevated Water TankⅡ[J].Technical Reports of Osaka University,1955,5(170):317-336.
[9]YAMAMOTO Y.The Liquid Sloshing and the Impulsive Pressures of Oil Storage Tanks due to Earthquakes[J].Journal of High Pressure Institute of Japan,1965,3(1):2-8.
[10]TETSUYA M.Sloshing in a Cylindrical Liquid Storage Tank With a Floating Roof Under Seismic Excitation[J].ASME Journal of Pressure Vessel Technology,2007,129(4):557-566.
[11]TETSUYA M.Sloshing in a Cylindrical Liquid Storage Tank with a Single-Deck Type Floating Roof Under Seismic Excitation[J].Journal of Pressure Vessel Technology,2009,131(021303):1-10.
[12]孙建刚.立式储罐地震响应控制研究[D].北京:中国地震局工程力学研究所,2002.
[13]孙建刚,李德昌,崔利富,等.非线性隔震立式浮顶储罐双向地震作用分析[J].世界地震工程,2011,27(2):70-76.
[14]KELLY J M.Aseismic Base Isolation:Review and Bibliography[J].Soil Dynamics and Earthquake Engineering,1986,(5):202-216.
[15]MEDHAT A H,HANMDY M E.Model for Flexible Tanks Undergoing Roching[J].Journal of Engineering Mechanics,1985,111(2):143-157.
[16]徐英,杨一凡,朱萍.球罐和大型储罐[M].北京:化学工业出版社,2005.
[17]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[18]日本建筑学会.隔震结构设计[M].北京:地震出版社,2006.
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