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Seismic analysis of a LNG storage tank isolated by a multiple friction pendulum system

查看全文 作　　者：Zhang Ruifu Weng Dagen Ren [1]Xiaosong 高影响力作者 机构地区：[1]State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China高影响力机构 出　　处：《Earthquake Engineering and Engineering Vibration》索引2011年第10卷第2期,共10页高影响力期刊 基　　金：Foundation of Basic Research Program of State Key Laboratory from Ministry of Science and Technology of China Under Grant No. SLDRCE10-D-01;Foundation of Shanghai Engineering Technical Research Centre Under Grant No. 10DZ2252000 摘　　要：The seismic response of an isolated vertical, cylindrical, extra-large liquefi ed natural gas (LNG) tank by a multiple friction pendulum system (MFPS) is analyzed. Most of the extra-large LNG tanks have a fundamental frequency which involves a range of resonance of most earthquake ground motions. It is an effective way to decrease the response of an isolation system used for extra-large LNG storage tanks under a strong earthquake. However, it is diff icult to implement in practice with common isolation bearings due to issues such as low temperature, soft site and other severe environment factors. The extra-large LNG tank isolated by a MFPS is presented in this study to address these problems. A MFPS is appropriate for large displacements induced by earthquakes with long predominant periods. A simplifi ed fi nite element model by Malhotra and Dunkerley is used to determine the usefulness of the isolation system. Data reported and statistically sorted include pile shear, wave height, impulsive acceleration, convective acceleration and outer tank acceleration. The results show that the isolation system has excellent adaptability for different liquid levels and is very effective in controlling the seismic response of extra-large LNG tanks. 关 键 词：LNG储罐 摩擦摆系统 抗震分析 地震反应分析 地震地面运动 多功能事务机 多功能打印机 液化天然气
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