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Research Paper

Development of a Structural-Analysis Model for Blast-Resistant Design of Plant Facilities Subjected to Vapor-Cloud Explosion

증기운 폭발을 받는 플랜트 시설물의 내폭설계를 위한 구조 해석 모델 개발

Bo-Young Choi1
,
Seung-Hoon Lee2
,
Han-Soo Kim3*
최 보영1
,
이 승훈2
,
김 한수3*
1Graduate Student, Department of Architecture, Konkuk University, Seoul, 05029, Korea
2Graduate Student, Department of Architecture, Konkuk University, Seoul, 05029, Korea
3Professor, Department of Architecture, Konkuk University, Seoul, 05029, Korea
1건국대학교 건축학과 석사과정
2건국대학교 건축학과 박사과정
3건국대학교 건축학과 교수
*Corresponding Author
30 April 2024. pp. 103-110
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Abstract

In this study, a nonlinear dynamic analysis of a frame and single member, which reflect the characteristics of a plant facility, is performed using the commercial MIDAS GEN program and the results are analyzed. The general structural members and material properties of the plant are considered. The Newmark average-acceleration numerical-analysis method is applied to a plastic hinge to study material nonlinearity. The blast load of a vapor-cloud explosion, a representative plant explosion, is calculated, and nonlinear dynamic analysis is conducted on a frame and single member. The observed dynamic behavior is organized according to the ratio of natural period to load duration, maximum displacement, ductility, and rotation angle. The conditions and range under which the frame functions as a single member are analyzed and derived. NSFF with a beam-column stiffness ratio of 0.5 and ductility of 2.0 or more can be simplified and analyzed as FFC, whereas NSPF with a beam-column stiffness ratio of 0.5 and ductility of 1.5 or more can be simplified and analyzed as FPC. The results of this study can serve as guidelines for the blast-resistant design of plant facilities.

Keywords
plant facilities
vapor-cloud explosion
nonlinear dynamic analysis
blast-resistant design

본 논문에서는 상용 프로그램 MIDAS GEN을 활용하여 플랜트 시설물의 특성을 반영한 골조와 단일 부재의 비선형 동적 해석을 수행하였으며 이에 따른 결과를 분석하였다. 플랜트에 배치되는 일반적인 구조 부재의 크기와 재료적 특성을 고려하였으며, 수치해석 방법 중 뉴마크 평균 가속도법, 재료 비선형을 고려하기 위한 소성 힌지를 적용하였다. 플랜트 폭발의 대표적 유형인 증기운 폭발의 폭발하중을 산정하였으며, 이를 골조 및 단일 부재에 적용하여 비선형 동적 해석을 수행하였다. 동적 거동의 결과는 고유주기와 하중지속시간의 비율, 최대변위, 연성도, 회전각으로 정리하였으며 골조를 단일 부재로 해석할 수 있는 조건과 범위를 분석 및 확인하였다. 보-기둥 강성비가 0.5, 연성도가 2.0 이상인 NSFF는 FFC로 단순화할 수 있으며, 보-기둥 강성비가 0.5, 연성도가 1.5 이상인 NSPF는 FPC로 단순화하여 해석할 수 있다. 본 연구의 결과는 플랜트 시설물의 내폭설계 가이드라인으로 활용될 수 있다.

키워드
플랜트 시설물
증기운 폭발
비선형 동적 해석
내폭설계
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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 : 37
  • No :2
  • Pages :103-110
  • Received Date : 2024-01-02
  • Revised Date : 2024-01-04
  • Accepted Date : 2024-01-05
  • DOI :https://doi.org/10.7734/COSEIK.2024.37.2.103
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