三向地震激励下浮顶储罐动力屈曲
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摘要
为进行三向地震激励作用下非隔震与隔震浮顶储罐动力屈曲特性对比分析,验证基础隔震提高储罐抗震安全度的有效性.以150 000 m3大型立式浮顶储罐为研究对象,应用ADINA有限元分析软件建立数值仿真分析模型,采用加速度激励加载方式,应用Newmark数值积分方法进行动力响应分析,根据B-R动力屈曲准则确定相应的临界屈曲加速度峰值.结果表明:非隔震与隔震情况下罐壁发生屈曲均为弹性屈曲,采用基础隔震可以有效提高储罐的动力屈曲临界荷载及塑性屈服荷载,提高幅度分别为69%和60%;对于罐壁的许用临界应力,我国规范安全等级高于美国和日本的规范要求.
To verify the effectiveness of base isolation of storage tank,the comparative analysis of dynamic buckling characteristics between non-isolation and isolation situation is carried out under three-dimensional seismic excitation.A 150 000 m3 large vertical floating roof storage tank is selected as the research object using the acceleration excitation loading mode,the finite element analysis model is established by ADINA.The seismic response of vertical storage tank is analyzed by Newmark numerical method.According to B-R dynamic buckling criteria,the critical acceleration peak value of dynamic buckling is determined.Results show that the buckling modes of these two types of tank are all elastic buckling,the critical load of dynamic buckling and plasticity yielding are all effectively increased by using base isolation,and the increasing rates are up to 69% and 60% respectively.For the allowable stress of storage tank wall,our country code safety rating is higher than that of the United States and Japan's specification.
To verify the effectiveness of base isolation of storage tank,the comparative analysis of dynamic buckling characteristics between non-isolation and isolation situation is carried out under three-dimensional seismic excitation.A 150 000 m3 large vertical floating roof storage tank is selected as the research object using the acceleration excitation loading mode,the finite element analysis model is established by ADINA.The seismic response of vertical storage tank is analyzed by Newmark numerical method.According to B-R dynamic buckling criteria,the critical acceleration peak value of dynamic buckling is determined.Results show that the buckling modes of these two types of tank are all elastic buckling,the critical load of dynamic buckling and plasticity yielding are all effectively increased by using base isolation,and the increasing rates are up to 69% and 60% respectively.For the allowable stress of storage tank wall,our country code safety rating is higher than that of the United States and Japan's specification.
引文
[1]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.SUN Jian-gang.Research on the earthquake responses controlof the vertical storage tanks[D].Beijing:Institute of Engineer-ing Mechanics China Seismological Bureau,2002.(in Chinese)
[2]NATSIAVAS S,BABCOCK C D.Buckling at the top ofafluid-filled tank during base excitation[J].ASME Journal of PressureVessel Technology,1987,109(4):374-380.
[3]NAGASHIMAH,KOKUBO K,TAKAYANAGI M,et al.Ex-perimental study on the dynamic buckling of cylindrical tanksComparison between static buckling and dynamic buckling[J].JSME International Journal,1987,30(263):737-46.
[4]吴志平.拱顶锚固储罐谐波动力响应及动力屈曲分析[D].大庆:大庆石油学院,2009.WU Zh-i ping.Analysis of harmonic wave dynamic response anddynamic buckling of vault anchorage tank[D].Daqing:DaqingPetroleum Institute,2009.(in Chinese)
[5]沈建民.大型油罐的静强度及动力响应分析[D].杭州:浙江大学,2006.SHEN Jian-min.Study on static strength and dynamic responseofthe large oil storage tank[D].Hangzhou:Zhejiang Univers-ity,2006.(in Chinese)
[6]陈志平.大型非锚固储罐应力分析与抗震研究[D].杭州:浙江大学,2006.CHEN Zh-i ping.Stress analysis and aseismatic research of largeunanchored oil storage tanks[D].Hangzhou:Zhejiang Univers-ity,2006.(in Chinese)
[7]吴灵宇,考虑液体晃动和罐底提离的立式储罐地震反应分析[D].哈尔滨:哈尔滨工业大学,2005.WU Ling-yu.Analysis of seismic response of liquid-storage ele-vated tank involving fluid sloshing and the uplift of tank bottom[D].Harbin:Harbin Institute of Technology,2005.(in Ch-inese)
[8]BUDIANSKY B,ROTH S.Axisymmetric dynamic buckling ofclamped shallow spherical shells[J].NASA Collected Papers onStability of Shell Structures,TN-1510.1962:597-606.
[9]VIRELLA J C,GODOY L A,SUAEZ L E.Dynamic buckling ofanchored steel tanks subjected to horizontal earthquake excitation[J].Journal of Constructional Steel Research,2006,62:521-531.
[10]孙建刚.大型立式储罐隔震—理论、方法及实验[M].北京:科学出版社,2009.SUN Jian-gang.Isolation of Large Vertical Storage Tank—Theory,Method,Test[M].Beijing:Science Press,2009.(inChinese)
[2]NATSIAVAS S,BABCOCK C D.Buckling at the top ofafluid-filled tank during base excitation[J].ASME Journal of PressureVessel Technology,1987,109(4):374-380.
[3]NAGASHIMAH,KOKUBO K,TAKAYANAGI M,et al.Ex-perimental study on the dynamic buckling of cylindrical tanksComparison between static buckling and dynamic buckling[J].JSME International Journal,1987,30(263):737-46.
[4]吴志平.拱顶锚固储罐谐波动力响应及动力屈曲分析[D].大庆:大庆石油学院,2009.WU Zh-i ping.Analysis of harmonic wave dynamic response anddynamic buckling of vault anchorage tank[D].Daqing:DaqingPetroleum Institute,2009.(in Chinese)
[5]沈建民.大型油罐的静强度及动力响应分析[D].杭州:浙江大学,2006.SHEN Jian-min.Study on static strength and dynamic responseofthe large oil storage tank[D].Hangzhou:Zhejiang Univers-ity,2006.(in Chinese)
[6]陈志平.大型非锚固储罐应力分析与抗震研究[D].杭州:浙江大学,2006.CHEN Zh-i ping.Stress analysis and aseismatic research of largeunanchored oil storage tanks[D].Hangzhou:Zhejiang Univers-ity,2006.(in Chinese)
[7]吴灵宇,考虑液体晃动和罐底提离的立式储罐地震反应分析[D].哈尔滨:哈尔滨工业大学,2005.WU Ling-yu.Analysis of seismic response of liquid-storage ele-vated tank involving fluid sloshing and the uplift of tank bottom[D].Harbin:Harbin Institute of Technology,2005.(in Ch-inese)
[8]BUDIANSKY B,ROTH S.Axisymmetric dynamic buckling ofclamped shallow spherical shells[J].NASA Collected Papers onStability of Shell Structures,TN-1510.1962:597-606.
[9]VIRELLA J C,GODOY L A,SUAEZ L E.Dynamic buckling ofanchored steel tanks subjected to horizontal earthquake excitation[J].Journal of Constructional Steel Research,2006,62:521-531.
[10]孙建刚.大型立式储罐隔震—理论、方法及实验[M].北京:科学出版社,2009.SUN Jian-gang.Isolation of Large Vertical Storage Tank—Theory,Method,Test[M].Beijing:Science Press,2009.(inChinese)
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