Journal of the Society of Disaster Information (한국재난정보학회 논문집)

The Korean Society of Disaster Information (한국재난정보학회)
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Seismic Performance Evaluation of Multi-Story Piping Systems using Triple Friction Pendulum Bearing

지진격리장치를 적용한 복층구조파이핑 시스템의 내진성능평가

  • Ryu, Yonghee (Department of Civil Engineering, North Carolina State University) ;
  • Ju, Buseog (Department of Civil Engineering, Kyunghee University) ;
  • Son, Hoyoung (Department of Civil Engineering, Kyunghee University)
  • Received : 2018.11.09
  • Accepted : 2018.12.20
  • Published : 2018.12.31
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Abstract

Purpose: The evaluation of seismic performance of critical structures has been emerging a key issue in Korea, since a magnitude 5.8 earthquake, the worst in Koran history, struck Gyeongju, southern area in Korea on september 12th, 2016. In particular, the catastrophic failure of nonstructural components such as sprinkler piping systems can cause significant economic loss or loss of life during and after an earthquake. The nonstructural components can be more fragile than structural components in seismic behavior. Method: This study presents the seismic performance evaluation of fire protection piping system, using coupled building-piping system installed with Triple Friction Pendulum Bearings (TPBs). Kobe (Japan), Kocaeli (Turkey), and GyeongJu (Korea) were selected to consider the uncertainty of ground motions in this study. Result: In the simulation results, it was observed that the reduction of maximum displacements of the piping system with the TPBs' system was significant: Kobe, Kocaeli, and Gyeongju cases were 49%, 14.4% and 21.5%, respectively. Conclusion: Therefore, using seismically isolated system in a building-piping system can be more effective to reduce the seismic risk than a normally installed building-piping systems without TPBs in strong earthquakes.

연구목적: 2016년 9월 경주 이후 구조물 및 비구조물의 지진 안전성 및 내진성능에 관한 문제가 이슈화 되고 있으며, 특히 배관 시스템의 경우 구조요소 보다 지진 발생시 내진성능에 있어서 취약하다고 볼 수 있다. 스프링클러 배관 시스템과 같은 비구조적 구성요소의 손상으로 인해 지진 발생 및 이후에 상당한 경제적 손실이나 생명 손실을 초래 할 수 있다. 연구방법: 본 연구는 Triple Friction Pendulum Bearings (TPBs)을 설치한 건물 배관 시스템을 이용한 소방 배관 시스템의 내진성능평가를 제시한다. Kobe, Kocaeli, GyeongJu 지진을 고려하여 지반 운동의 불확실성을 고려하였다. 연구결과: 빌딩 시스템과 파이핑 시스템의 첫 번째 모드는 각각 약 5.8Hz와 약 2.742Hz로 나타났으며, 또한 TPBs 시스템이 적용된 배관 시스템의 최대 변위는 Kobe, Kocaeli 및 GyeongJu 지진의 경우 각각 49%, 14.4%, 21.5%가 감소한 것으로 나타났다. 결론: 따라서 건물 배관 시스템에서 지진 격리 시스템을 사용하면 지진이 심할 때 TPB가 없는 일반적으로 설치된 걸물 배관 시스템보다 지진 위험을 줄일 수 있다.

Keywords

JNJBBH_2018_v14n4_450_f0001.png 이미지

Fig 1. 2-Story Piping System (Ryu, 2016)

JNJBBH_2018_v14n4_450_f0002.png 이미지

Fig 2. T-Joint Tests (Tian, 2010)

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Fig 3. T-Joint Connections (Ryu, 2016)

JNJBBH_2018_v14n4_450_f0004.png 이미지

Fig 4. 2-Story Building Model

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Fig 5. Triple Friction Pendulum Bearing (Dao, 2013)

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Fig 6. Normalized Backbone Curve of Standard TPBs (Dao, 2013)

JNJBBH_2018_v14n4_450_f0007.png 이미지

Fig 7. Acceleration Response Spectrum

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Fig 8. Maximum Rotation at T-Joints

Table 1. Piping Frequencies (Ryu, 2016)

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Table 2. Material Properties of Building System (Wood, 2012)

JNJBBH_2018_v14n4_450_t0002.png 이미지

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