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http://dx.doi.org/10.7734/COSEIK.2017.30.2.95

Seismic Fragility Analysis of a LNG Tank with Friction Pendulum System of Various Friction Coefficient  

Moon, Ji-Hoon (Department of Civil & Environmental Engineering, Yonsei University)
Kim, Ji-Su (Department of Civil & Environmental Engineering, Yonsei University)
Lee, Tae-Hyung (Department of Civil Engineering, Konkuk University)
Han, Tong-Seok (Department of Civil & Environmental Engineering, Yonsei University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.30, no.2, 2017 , pp. 95-102 More about this Journal
Abstract
The friction pendulum system(FPS) is a kind of seismic isolation devices for isolating structures from an earthquake. To analyze the effect of friction materials used in the friction pendulum system, fragility analysis of LNG tank with seismic isolation system was conducted. In this study, titanium dioxide($TiO_2$) nanoparticles were incorporated into polyvinylidene fluoride(PVDF) matrix to produce friction materials attached to the FPS. The base moment of the concrete outer tank and the acceleration of the structure were evaluated from different mixing ratios of constituents for the friction materials. The seismic fragility curves were developed based on two types of limit state. It is confirmed that evaluation of combined fragility curves with several limit states can be applied to select the optimum friction material satisfying the required performance of the FPS for various infrastructure.
Keywords
friction pendulum system(FPS); friction material; LNG tank; PVDF; $TiO_2$; seismic fragility; simulation;
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