考虑SSI效应的15×10~4 m~3储罐基础隔震数值仿真分析
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摘要
为考虑土与结构相互作用(SSI)对15×104m3大型立式储罐基础隔震效应的影响,采用弹簧-阻尼系统模拟地基土和隔震层,罐壁及底板采用壳单元,流体采用势流体单元,利用ADINA建立15×104m3储罐有限元模型,在峰值加速度0.2g El Centro波地震激励下,应用Newmark数值积分方法进行地震响应分析,结果表明:考虑SSI效应时,非隔震储罐的地震响应有所减小,而基础隔震时地震响应有放大效应。储罐抗震减震设计时,中软地基土上储罐从结构设计安全角度来说需要考虑土与结构的相互作用。
To consider the soil-structure interaction(SSI) effect on the base isolation of the 15×104m3 vertical storage tank,this paper presents a method by using spring-damper system to simulate the foundation soil and the isolation layer,and shell element in the analysis of tank wall and bottom plate,while the fluid is simulated by potential fluid element,and the ADINA method is used to establish the 15×104m3 tank finite element model.Newmark numerical integration methods for earthquake response analysis is applied under the seismic excitation,in which the El Centro ground motion is used with peak acceleration 0.2g.The results show that in the case of considering the effect of SSI,the seismic responses of the non-isolation tank are decreased when there is amplification effect of the base isolation.In tank seismic design,soil-structure interaction in soft subsoil needs to be considered from the point of view of structure safety.
To consider the soil-structure interaction(SSI) effect on the base isolation of the 15×104m3 vertical storage tank,this paper presents a method by using spring-damper system to simulate the foundation soil and the isolation layer,and shell element in the analysis of tank wall and bottom plate,while the fluid is simulated by potential fluid element,and the ADINA method is used to establish the 15×104m3 tank finite element model.Newmark numerical integration methods for earthquake response analysis is applied under the seismic excitation,in which the El Centro ground motion is used with peak acceleration 0.2g.The results show that in the case of considering the effect of SSI,the seismic responses of the non-isolation tank are decreased when there is amplification effect of the base isolation.In tank seismic design,soil-structure interaction in soft subsoil needs to be considered from the point of view of structure safety.
引文
[1]孙建刚.大型立式储罐隔震——理论、方法及实验[M].北京:科学技术出版社,2009.SUN Jiangang.Isolation of large vertical storage tank——theory,method,test[M].Beijing:Science Press,2009.(in Chinese)
[2]孙建刚,崔利富,张营,等.土与结构相互作用对储罐地震响应的影响[J].地震工程与工程振动,2010,30(3):141-146.SUN Jiangang,CUI Lifu,ZHANG Ying,et al.Research on seismic responses of storage-tanks considering soil-structure interaction[J].Journal ofEarthquake Engineering and Engineering Vibration,2010,30(3):141-146.(in Chinese)
[3]周利剑.水平地震激励下立式储罐与地基相互作用动力响应研究[D].哈尔滨:哈尔滨工业大学,2006.ZHOU Lijian.Earthquake response analysis of liquid storage tanks under lateral excitations with soil-structure Interaction[D].Harbin:Harbin En-gineering University,2006.(in Chinese)
[4]崔利富,孙建刚,李德昌,等.考虑SSI效应的立式储罐水平基础隔震研究[J].世界地震工程,2011,27(2),140-141.CUI Lifu,SUN Jiangang,LI Dechang,et al.Seismic response of vertical storage tanks with horizontal base isolation considering soil-structure interac-tion(SSI)[J].World Earthquake Engineering,2011,27(2):140-141.(in Chinese)
[5]孙颖,孙建刚,崔利富,等.大型立式浮顶储罐基础隔震数值研究[J].世界地震工程,2011,27(3),121-123.SUN Ying,SUN Jiangang,CUI Lifu,et al.Numerical research on large base isolation vertical storage tanks with floating roof[J].World EarthquakeEngineering,2011,27(3),121-123.(in Chinese)
[6]于旭,宰金珉,庄海洋,等.SSI效应对隔震结构地震响应的影响分析[J].南京航空航天大学学报,2011,43(6):846-847.YU Xu,Zai Jinmin,ZHUANG Haiyang,et al.Effects of soil-structure interaction on earthquake response of isolated structure system[J].Journal ofNanjing University of Aeronautics&Astronautics,2011,43(6):846-847.(in Chinese)
[7]J.P.瓦尔夫.土-结构动力相互作用[M].北京:地震出版社,1989.Wolf J P.Dynamic soil-structure interaction[M].Beijing:Earthquake Publishing House,1989.(in Chinese)
[8]Haroun M A.Parametric study of seismic soil-tank interaction I:horizontal excitation[J].Journal of Engineering Mechanics,ASCE,1992,118(3):783-797.
[9]李慧,王亚楠,杜永峰.土-结构动力相互作用对基础隔震结构的影响[J].工程非隔震与加固改造,2012,34(1):38-39.LI Hui,WANG Yanan,DU Yongfeng.Influence of soil-structure dynamic interaction on base-isolation structure[J].Earthquake Resistant Engi-neering and Retrofitting,2012,34(1):38-39.(in Chinese)
[2]孙建刚,崔利富,张营,等.土与结构相互作用对储罐地震响应的影响[J].地震工程与工程振动,2010,30(3):141-146.SUN Jiangang,CUI Lifu,ZHANG Ying,et al.Research on seismic responses of storage-tanks considering soil-structure interaction[J].Journal ofEarthquake Engineering and Engineering Vibration,2010,30(3):141-146.(in Chinese)
[3]周利剑.水平地震激励下立式储罐与地基相互作用动力响应研究[D].哈尔滨:哈尔滨工业大学,2006.ZHOU Lijian.Earthquake response analysis of liquid storage tanks under lateral excitations with soil-structure Interaction[D].Harbin:Harbin En-gineering University,2006.(in Chinese)
[4]崔利富,孙建刚,李德昌,等.考虑SSI效应的立式储罐水平基础隔震研究[J].世界地震工程,2011,27(2),140-141.CUI Lifu,SUN Jiangang,LI Dechang,et al.Seismic response of vertical storage tanks with horizontal base isolation considering soil-structure interac-tion(SSI)[J].World Earthquake Engineering,2011,27(2):140-141.(in Chinese)
[5]孙颖,孙建刚,崔利富,等.大型立式浮顶储罐基础隔震数值研究[J].世界地震工程,2011,27(3),121-123.SUN Ying,SUN Jiangang,CUI Lifu,et al.Numerical research on large base isolation vertical storage tanks with floating roof[J].World EarthquakeEngineering,2011,27(3),121-123.(in Chinese)
[6]于旭,宰金珉,庄海洋,等.SSI效应对隔震结构地震响应的影响分析[J].南京航空航天大学学报,2011,43(6):846-847.YU Xu,Zai Jinmin,ZHUANG Haiyang,et al.Effects of soil-structure interaction on earthquake response of isolated structure system[J].Journal ofNanjing University of Aeronautics&Astronautics,2011,43(6):846-847.(in Chinese)
[7]J.P.瓦尔夫.土-结构动力相互作用[M].北京:地震出版社,1989.Wolf J P.Dynamic soil-structure interaction[M].Beijing:Earthquake Publishing House,1989.(in Chinese)
[8]Haroun M A.Parametric study of seismic soil-tank interaction I:horizontal excitation[J].Journal of Engineering Mechanics,ASCE,1992,118(3):783-797.
[9]李慧,王亚楠,杜永峰.土-结构动力相互作用对基础隔震结构的影响[J].工程非隔震与加固改造,2012,34(1):38-39.LI Hui,WANG Yanan,DU Yongfeng.Influence of soil-structure dynamic interaction on base-isolation structure[J].Earthquake Resistant Engi-neering and Retrofitting,2012,34(1):38-39.(in Chinese)
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