曹海韵^1,2，  杨  军²，  潘  鹏^1,2，  王  飞²，  狄启腾³，  申金昌²
    （1清华大学土木工程安全与耐久教育部重点试验室，北京 100084；2 清华大学土木工程系，北京100084；3 中国石油天然气股份公司唐山液化天然气项目经理部，北京 100007）

[摘要] 介绍了16万m³全包容式液化天然气储罐的隔震分析和设计；用两质点模型对罐内液体进行了简化；考虑了罐底桩基刚度和阻尼的影响；利用SAP2000建立了三维有限元模型并进行了地震响应的时程分析。结果表明：隔震后，基底平均剪力减小70010以上，隔震对罐体及液体脉冲质量的振动起到了良好的控制作用。
[关键词] 液体储罐；隔震；抗震设计；时程分析
中图分类号：TU398.7  文献标识码：A  文章编号：1002-848X( 2011) Sl-0211-05

Seismic analysis and design of a large base-isolated LNG tank
Cao Haiyun^1,2, Yang Jun²,  Peng Pan^1,2, Wang Fei²,  Di Qiteng³,  Shen JinChang²
(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Beijing 100084, China; 2 Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 3 Tangshan LNG project division of Petro China company linuted, Beijing 100007, China)

Abstract: The seismic analyses and design of a storage tank for liquid natural gas( LNG)  with a capacity of 160,000 m³ were presented. The liquid in the tank was simplified by a two mass two spring model. The effects of the damping and stiffness of the pile foundation undemeath to the response of the tanks were considered. Three dimensional model is established by SAP2000. Analysis and design were conducted. The results suggest that the base shear is decreased by more than 70%, and base isolation has significant effect to control the seismic response of the tanks and the liquid inside.
Keywords: liquid storage tank; base isolation; seisnuc design; time history analysis