The objective of this study is to establish a system for selecting the optimum friction material to meet the seismic performance requirements of a liquefied natural gas tank with a friction pendulum system (FPS). A methodology for determining the optimum frictional material using seismic fragility analysis is suggested, and it is applied to materials with various frictional coefficients for FPS. Seismic fragility curves with two different limit states are developed to determine the optimum friction material, and a methodology for combining fragility curves is proposed. The analysis shows that a lower friction coefficient for FPSs is more appropriate for preventing failure in FPSs and the superstructure investigated in this study.

中文翻译：

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隔震式LNG储罐抗震脆性分析以选择摩擦摆系统的最佳摩擦材料

本研究的目的是建立一个系统，用于选择最佳摩擦材料，以满足具有摩擦摆系统 (FPS) 的液化天然气储罐的抗震性能要求。提出了一种使用地震脆性分析确定最佳摩擦材料的方法，并将其应用于具有各种摩擦系数的 FPS 材料。为了确定最佳摩擦材料，开发了具有两种不同极限状态的地震脆性曲线，并提出了一种组合脆性曲线的方法。分析表明，较低的 FPS 摩擦系数更适合防止 FPS 和本研究中研究的上层建筑的故障。