Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Limit States and Corresponding Seismic Fragility of a Pipe Rack for Maintaining Operation

운전성 유지를 위한 파이프랙의 한계상태와 지진취약도

  • Kim, Juram (Department of Civil Engineering, Kookmin University) ;
  • Hong, Kee-Jeung (Department of Civil Engineering, Kookmin University) ;
  • Hwang, Jin-Ha (Gwangju & Jeonnam Center of Korea Conformity Laboratories)
  • 김주람 (국민대학교 건설시스템공학부) ;
  • 홍기증 (국민대학교 건설시스템공학부) ;
  • 황진하 (한국건설생활환경시험연구원 광주전남센터)
  • Received : 2023.09.18
  • Accepted : 2023.10.04
  • Published : 2023.11.01
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Abstract

Unlike other facilities, maintaining processes is essential in industrial facilities. Pipe racks, which support pipes of various diameters, are important structures used in industrial facilities. Since the transport process of pipes directly affects the operation of industrial facilities, a fragility curve should be derived based on considering not only the pipe racks' structural safety but also the pipes' transport process. There are several studies where the fragility curves have been determined based on the structural behavior of pipe racks. However, few studies consider the damage criteria of pipes to ensure the transportation process, such as local buckling and tensile failure with surface defects. In this study, an analysis model of a typical straight pipe rack used in domestic industrial facilities is constructed, and incremental dynamic analysis using nonlinear response history analysis is performed to estimate the parameters of the fragility curve by the maximum likelihood estimation. In addition, the pipe rack's structural behavior and the pipe's damage criteria are considered the limit state for the fragility curve. The limit states considered in this paper to evaluate fragility curves are more reasonable to ensure the transportation process of the pipe systems.

Keywords

Acknowledgement

본 논문은 국토교통부/국토교통과학기술진흥원 연구(과제번호RS-2021-KA163132)의 일환으로 수행되었음.

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