Abstract: The seismic isolation measures in the existing large building construction were studied in order to seek for the appropriate methods about shock absorption and isolation of large LNG storage tank. According to the demand of engineering isolation design of LNG storage tank，the theory of physical isolation and the method of isolation，the calculation of analytical method under different conditions were summarized. Considering the structural features of LNG storage tank，the standard composite model based on response spectrum analysis of LNG storage tank was proposed. Various physical isolation methods could be used in LNG storage tank technology. The frequency change of tank equipped with seismic isolation measures was the important factor of isolation effect. Further theoretical research is the basis for developing LNG seismic technology. The standard composite model of seismic analysis would provide a set of simple and effective design method for seismic design of storage tank.

Key words: LNG storage tank, seismic isolation and shock absorption, aseismic mechanism, response spectrum

摘要： 为了研究更合适的大型液化天然气（LNG）储罐隔震减震方法，本文分析了现有大型建构筑的减震隔震措施，结合LNG储罐隔震工程设计的需求，基于物理隔震方法、隔震理论，总结了不同措施下的设计计算方法；分析了LNG储罐结构体系的组成及其特点，提出了用于LNG储罐反应谱分析的标准复合模型。分析结果表明：各种物理隔震方法均可以在LNG储罐中得到应用，设置隔震装置后储罐固有频率的改变情况是影响隔震效果的关键，深入的隔震理论研究是LNG储罐抗震技术发展的基础条件，基于LNG储罐反应谱分析的标准复合模型为储罐抗震设计提供了一套简单有效的工程设计方法。

关键词: 液化天然气储罐, 隔震减震, 抗震机理, 设计反应谱