大型立式浮顶储罐基础隔震数值研究
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摘要
强震作用下,立式浮顶储罐破坏严重。为了降低浮顶储罐的地震响应,选取15×104m3大型立式浮顶储罐,引入基础隔震措施,并考虑浮顶的影响,应用势流体理论,采用ADINA建立有限元模型。研究在不同隔震层阻尼比、不同隔震周期、不同烈度及不同场地条件影响下,基础隔震浮顶储罐的地震响应并进行对比分析。结果表明:当隔震层阻尼比为0.2～0.3时减震效果较好,阻尼比存在合理优化区间;随着隔震周期、地震烈度的增加,基础隔震浮顶储罐的减震率增加;基础隔震浮顶储罐的减震效应受场地条件影响较大;基础隔震措施不能有效控制浮顶储罐的晃动波高。浮顶储罐隔震设计时需要综合考虑多种因素,选取最佳隔震设计参数。
The vertical storage tanks with floating roof are usually badly damaged in the strong earthquake.In order to reduce seismic response of vertical storage tanks,selecting 15×104m3 storage tank,the base isolation system was introduced and allowing for the impact of floating roof.Based on potential fluid theory,the finite element models were established by using ADINA.The seismic response of base isolation vertical storage tank with different factors such as isolation layer damping ratio,isolation periods,different site conditions and seismic intensity were calculated and comparativey analyzed.The results indicate that when isolation layer damping ratio close to 0.2~0.3 the effect of seismic isolation is best and there is a reasonable range of damping ratio optimization.The vibration reduction rate of base isolation vertical storage tanks with floating roof increases with the increase of isolation period and seismic intensity.Site conditions have a big influence on the vibration neduction effect of base isolation vertical storage tanks with floating roof.Isolation measures can not effectively control the sloshing wave height.Isolation earthquake design of storage tanks with floating roof must consider a variety of factors and select the best isolation design parameters.
The vertical storage tanks with floating roof are usually badly damaged in the strong earthquake.In order to reduce seismic response of vertical storage tanks,selecting 15×104m3 storage tank,the base isolation system was introduced and allowing for the impact of floating roof.Based on potential fluid theory,the finite element models were established by using ADINA.The seismic response of base isolation vertical storage tank with different factors such as isolation layer damping ratio,isolation periods,different site conditions and seismic intensity were calculated and comparativey analyzed.The results indicate that when isolation layer damping ratio close to 0.2~0.3 the effect of seismic isolation is best and there is a reasonable range of damping ratio optimization.The vibration reduction rate of base isolation vertical storage tanks with floating roof increases with the increase of isolation period and seismic intensity.Site conditions have a big influence on the vibration neduction effect of base isolation vertical storage tanks with floating roof.Isolation measures can not effectively control the sloshing wave height.Isolation earthquake design of storage tanks with floating roof must consider a variety of factors and select the best isolation design parameters.
引文
[1]孙建刚.大型立式储罐隔震——理论、方法及实验[D].北京:科学出版社,2009.SUN Jiangang.Isolation of largevertical storage tank—theory,method,test[M].Beijing:Science Press,2009.
[2]Shrimali M K,Jangid R S.Non-linear seismic response of base-isolated liquid storage tanks to bi-directional excitation[J].Nuclear Engineering&Design,2002,217(1/2):1-20.
[3]孙建刚,周丽,袁朝庆,等.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 Jiangang,ZHOU Li,YUAN Zhaoqing,et al.Dynamic characteristic analysis of base isolation for vertical storage tank[J].Journal of Earth-quake Engineering and Engineering Vibration,2001,21(3):140-144.
[4]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.
[5]孙建刚.立式储罐地震响应控制研究[D].哈尔滨:中国地震局工程力学研究所,2002.SUN Jiangang.Research on the earthquake responses control of the vertical storage tanks[D].Institute of Engineering Mechanics China Seismologi-cal Bureau Harbin,2002.
[6]孙建刚,崔利富,赵长军,等.15×104m3立式储罐隔震设计分析[J].地震工程与工程振动,2010,30(4):153-158.SUN Jiangang,CUI Lifu,ZHAO Changjun,et al.Design and analysis of seismic isolation for 15×104 m3 vertical storage tank[J].Journal ofEarthquake Engineering and Engineering Vibration,2010,30(4):153-158.
[7]孙建刚,王向楠,赵长军.立式储罐基底隔震的基本理论[J].哈尔滨工业大学学报,2010,42(4):639-643.SUN Jiangang,WANG Xiangnan,ZHAO Changjun.Theoretical study on seismic isolation of storage tanks[J].Journal of Harbin Institute of Tech-nology,2010,42(4):639-643.
[8]温德超,郑兆昌,孙焕纯.储液罐抗震研究进展[J].力学进展,1995,25(1):60-76.WEN Dechao,ZHENG Zhaochang,SUN Huanchun.Development of a seismic research on liquid storage tanks[J].Advances in Mechanics,1995,25(1):60-76.
[9]PASLEY H,CLARK C.Computational fluid dynamics study of flow around floating-roof oil storage tanks[J].Journal of Wind Engineering andIndustrial Aerodynamics,2000,86(1):37-54.
[10]Bathe K J,Adina理论手册(I)[R].1999.Bathe K J,AdinaTheory Manual(I)[R].1999.
[2]Shrimali M K,Jangid R S.Non-linear seismic response of base-isolated liquid storage tanks to bi-directional excitation[J].Nuclear Engineering&Design,2002,217(1/2):1-20.
[3]孙建刚,周丽,袁朝庆,等.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 Jiangang,ZHOU Li,YUAN Zhaoqing,et al.Dynamic characteristic analysis of base isolation for vertical storage tank[J].Journal of Earth-quake Engineering and Engineering Vibration,2001,21(3):140-144.
[4]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.
[5]孙建刚.立式储罐地震响应控制研究[D].哈尔滨:中国地震局工程力学研究所,2002.SUN Jiangang.Research on the earthquake responses control of the vertical storage tanks[D].Institute of Engineering Mechanics China Seismologi-cal Bureau Harbin,2002.
[6]孙建刚,崔利富,赵长军,等.15×104m3立式储罐隔震设计分析[J].地震工程与工程振动,2010,30(4):153-158.SUN Jiangang,CUI Lifu,ZHAO Changjun,et al.Design and analysis of seismic isolation for 15×104 m3 vertical storage tank[J].Journal ofEarthquake Engineering and Engineering Vibration,2010,30(4):153-158.
[7]孙建刚,王向楠,赵长军.立式储罐基底隔震的基本理论[J].哈尔滨工业大学学报,2010,42(4):639-643.SUN Jiangang,WANG Xiangnan,ZHAO Changjun.Theoretical study on seismic isolation of storage tanks[J].Journal of Harbin Institute of Tech-nology,2010,42(4):639-643.
[8]温德超,郑兆昌,孙焕纯.储液罐抗震研究进展[J].力学进展,1995,25(1):60-76.WEN Dechao,ZHENG Zhaochang,SUN Huanchun.Development of a seismic research on liquid storage tanks[J].Advances in Mechanics,1995,25(1):60-76.
[9]PASLEY H,CLARK C.Computational fluid dynamics study of flow around floating-roof oil storage tanks[J].Journal of Wind Engineering andIndustrial Aerodynamics,2000,86(1):37-54.
[10]Bathe K J,Adina理论手册(I)[R].1999.Bathe K J,AdinaTheory Manual(I)[R].1999.
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