大型储罐地震作用下罐壁抗失稳可靠度分析
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摘要
大型储罐在地震作用下的典型破坏形式是"象足"屈曲破坏,而轴向压应力是"象足"屈曲破坏的主要因素。结合实际工程情况,运用大型通用有限元分析软件Adina对大型储罐在不同地震烈度、储液深度下的罐壁轴向压应力进行地震作用下的数值模拟,并运用可靠性分析的JC法,分析大型储罐不同储液深度、不同地震烈度下的罐壁抗失稳可靠度情况。结果表明:在同一地震烈度下,随着储罐储液深度的增加,储罐罐壁的轴向压应力将随之增大;大型储罐同一地震烈度下储液深度越大,罐壁轴向抗失稳可靠度越低;在实际工程设计中应该首先进行工程场地地震安全性评价,尽可能避开地震带。
Elephant-foot buckling is a typical failure mode of the large storage tank under the earthquake,and axial compressive stress is the main factor of elephant-foot buckling.Considering the practical engineering situations,the large storage tank was simulated under the earthquake using large general finite element analysis software Adina.The effect of seismic intensity and depth of liquid on the axial compressive stress in the bottom of the tank shell was considered.The reliability on the anti-buckling effect of the storage tank was calculated in different depth of liquid and seismic intensity using JC method.The results show that in the same seismic intensity,the axial compressive stress along tank wall increases with the depth of liquid in the storage tank increasing.The axial anti-buckling reliability along the tank wall decreases with the depth of liquid increasing under the same seismic intensity in large storage tank.In practical engineering design,the site seismic safety should be evaluated firstly,as far as possible to avoid the earthquake zone.
Elephant-foot buckling is a typical failure mode of the large storage tank under the earthquake,and axial compressive stress is the main factor of elephant-foot buckling.Considering the practical engineering situations,the large storage tank was simulated under the earthquake using large general finite element analysis software Adina.The effect of seismic intensity and depth of liquid on the axial compressive stress in the bottom of the tank shell was considered.The reliability on the anti-buckling effect of the storage tank was calculated in different depth of liquid and seismic intensity using JC method.The results show that in the same seismic intensity,the axial compressive stress along tank wall increases with the depth of liquid in the storage tank increasing.The axial anti-buckling reliability along the tank wall decreases with the depth of liquid increasing under the same seismic intensity in large storage tank.In practical engineering design,the site seismic safety should be evaluated firstly,as far as possible to avoid the earthquake zone.
引文
[1]GB 50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2008.
[2]GB 50341-2003,立式圆筒形钢制焊接油罐设计规范[S].北京:中国计划出版社,2005.
[3]HAROUN MA,BHHTIA H.Numerical simulation of el-ephant-foot-buckling of seismically-excited steel cylindri-cal tanks[C]//Proceedings of the 1997 ASME PressureVessels and Piping Conference,July 27-31,1997,NY,USA,Orlando,FL.New York:AWME,c1997:333-340.
[4]程旭东,徐剑.立式储油罐地震作用下的抗提离可靠度分析[J].世界地震工程,2010,26(1):173-177.CHENG Xu-dong,XU Jian.The reliability analysis onthe anti-lift-off effect of the storage tank under the earthshock[J].World Eathquake Engineering,2010,26(1):173-177.
[5]GB50009-2001,建筑结构荷载规范[S].北京:中国建筑工业出版社,2006.
[6]江近仁,孙景江.考虑参数不确定性的结构动力可靠度分析[J].世界地震工程,1992,8(1):30-36.JIANG Jin-ren,SUN Jing-jiang.The reliability analysisconsidering the uncertainty of parameters of structure dy-namic[J].World Earthquake Engineering,1992,8(1):30-36.
[7]贡金鑫.工程结构可靠度计算方法[M].大连:大连理工大学出版社,2003:133-145.
[8]欧进萍,段宇博,刘会仪.结构随机地震作用及其统计参数[J].哈尔滨建筑工程学院学报,1994,27(5):1-10.OU Jin-ping,DUAN Yu-bo,LIU Hui-yi.Random earth-quake of structure and its statistical parameters[J].Journal of Harbin University of Architecture and Engi-neering,1994,27(5):1-10.
[9]陈志平.大型非锚固储油罐应力分析与抗震研究[D].杭州:浙江大学化工机械研究所,2006.CHEN Zhi-ping.Stress analysis and aseismatic research oflarge unanchored oil storage tanks[D].Hangzhou:Insti-tute of Chemical Machine,Zhejiang University,2006.
[10]GB50153-2008,工程结构可靠性设计统一标准[S].北京:中国建筑工业出版社,2008.
[2]GB 50341-2003,立式圆筒形钢制焊接油罐设计规范[S].北京:中国计划出版社,2005.
[3]HAROUN MA,BHHTIA H.Numerical simulation of el-ephant-foot-buckling of seismically-excited steel cylindri-cal tanks[C]//Proceedings of the 1997 ASME PressureVessels and Piping Conference,July 27-31,1997,NY,USA,Orlando,FL.New York:AWME,c1997:333-340.
[4]程旭东,徐剑.立式储油罐地震作用下的抗提离可靠度分析[J].世界地震工程,2010,26(1):173-177.CHENG Xu-dong,XU Jian.The reliability analysis onthe anti-lift-off effect of the storage tank under the earthshock[J].World Eathquake Engineering,2010,26(1):173-177.
[5]GB50009-2001,建筑结构荷载规范[S].北京:中国建筑工业出版社,2006.
[6]江近仁,孙景江.考虑参数不确定性的结构动力可靠度分析[J].世界地震工程,1992,8(1):30-36.JIANG Jin-ren,SUN Jing-jiang.The reliability analysisconsidering the uncertainty of parameters of structure dy-namic[J].World Earthquake Engineering,1992,8(1):30-36.
[7]贡金鑫.工程结构可靠度计算方法[M].大连:大连理工大学出版社,2003:133-145.
[8]欧进萍,段宇博,刘会仪.结构随机地震作用及其统计参数[J].哈尔滨建筑工程学院学报,1994,27(5):1-10.OU Jin-ping,DUAN Yu-bo,LIU Hui-yi.Random earth-quake of structure and its statistical parameters[J].Journal of Harbin University of Architecture and Engi-neering,1994,27(5):1-10.
[9]陈志平.大型非锚固储油罐应力分析与抗震研究[D].杭州:浙江大学化工机械研究所,2006.CHEN Zhi-ping.Stress analysis and aseismatic research oflarge unanchored oil storage tanks[D].Hangzhou:Insti-tute of Chemical Machine,Zhejiang University,2006.
[10]GB50153-2008,工程结构可靠性设计统一标准[S].北京:中国建筑工业出版社,2008.
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