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2017 Vol.30, Issue 2
Seismic Fragility Analysis of a LNG Tank with Friction Pendulum System of Various Friction Coefficient

마찰재 물성변화에 따른 마찰진자시스템을 적용한 LNG 탱크의 지진취약도 분석

Ji-Hoon Moon1
,
Ji-Su Kim1
,
Tae-Hyung Lee2
,
Tong-Seok Han1†
문 지 훈1
,
김 지 수1
,
이 태 형2
,
한 동 석1†
1Department of Civil & Environmental Engineering, Yonsei University, Seoul, 03722, Korea
2Department of Civil Engineering, Konkuk University, Seoul, 05029, Korea
1연세대학교 토목환경공학과
2건국대학교 인프라시스템공학과
†Corresponding author : +82-2-2123-5801; E-mail: tshan@yonsei.ac.kr
2017. pp. 95-102
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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(TiO2) 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
TiO2
seismic fragility
simulation

이 논문에서는 LNG 탱크를 지진으로부터 격리시키는 면진장치의 일종인 마찰진자시스템(FPS)의 성능변화에 따른 구조 물 응답 및 지진취약도를 분석하였다. 마찰진자시스템(FPS)에 사용되는 마찰재 시편을 PVDF와 TiO2의 배합비율에 따라 제 작하였다. 제작한 마찰재 시편의 물성을 면진받침에 적용하여 구조물의 가속도 응답 및 외조 콘크리트의 하부 모멘트에 대 하여 분석하고 각각의 한계상태에 대해 지진취약도를 분석하였다. 구조물의 지진취약도 분석을 통한 최적의 배합비를 가지 는 마찰재 선정을 위해 각 한계상태에 따른 지진취약도 곡선의 가중치 설정 후 조합이 필요한 것을 확인하였다. 이를 통하여 다양한 구조물에 적용되는 마찰진자시스템의 요구 성능을 만족하는 최적의 마찰재 선정이 가능할 것으로 기대된다.

키워드
마찰진자시스템(FPS)
마찰재
LNG 탱크
PVDF
TiO2
지진취약도
시뮬레이션
References

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Information
  • Publisher :Computational Structural Engineering Institute of Korea
  • Publisher(Ko) :한국전산구조공학회
  • Journal Title :Journal of the Computational Structural Engineering Institute of Korea
  • Journal Title(Ko) :한국전산구조공학회 논문집
  • Volume : 30
  • No :2
  • Pages :95-102
  • Received Date : 2016-09-21
  • Revised Date : 2017-01-18
  • Accepted Date : 2017-02-08
  • DOI :https://doi.org/10.7734/COSEIK.2017.30.2.95
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