关键词: 液化天然气储罐, 隔震减震, 抗震机理, 设计反应谱

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