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

Seismic analysis of a LNG storage tank isolated by a multiple friction pendulum system
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多摩擦摆系统隔震 LNG 储罐的地震分析

DOI:
10.1007/s11803-011-0063-3
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发表时间:
2011-06
影响因子:
2.8
通讯作者:
Ren Xiaosong
Ren Xiaosong
中科院分区:
工程技术3区
文献类型:
--
作者:
Zhang Ruifu;Weng Dagen;Ren Xiaosong

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分析了立式超大型液化天然气(LNG)立式储罐在多重摩擦摆系统(MFP)作用下的地震反应。大多数超大型液化天然气储罐都有一个基频,这涉及到大多数地震地面运动的一系列共振。这是减小特大型液化天然气储罐隔震体系在强震作用下反应的有效途径。然而,由于温度低、场地软等恶劣环境因素,普通隔震支座在实践中难以实施。为了解决这些问题,本研究提出了一个由MFP隔离的特大型LNG储罐。MFP适用于长优势周期地震引起的大位移。采用Malhotra和Dunkerley的简化有限元模型来确定隔震系统的有效性。报告和统计分类的数据包括桩剪切力、波高、脉冲加速度、对流加速度和外罐加速度。结果表明,该隔震体系对不同液位具有良好的适应性,对超大型液化天然气储罐的地震反应控制是非常有效的。
The seismic response of an isolated vertical, cylindrical, extra-large liquefied 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 difficult 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 simplified finite 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.
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发表时间: 2010
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