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2024 Vol.37, Issue 4 Preview Page

Research Paper

Structural Performance of Coated Steel Pipe Connections Subjected to Various Loading Conditions: An Analytical Study

다양한 하중 조건에 따른 코팅 강관 연결부의 구조성능 평가

Myung Kue Lee1
,
Sanghwan Cho2
,
Min Ook Kim3†
이 명규1
,
조 상환2
,
김 민욱3†
1Professor, Department of Civil and Environmental Engineering, Jeonju University, Jeonju, 55069, Korea
2Graduate Student, Department of Civil Engineering, Seoul National University of Science and Technology, Seoul, 01811, Korea
3Assistant Professor, Department of Civil Engineering, Seoul National University of Science and Technology, Seoul, 01811, Korea
1전주대학교 토목환경공학과 교수
2서울과학기술대학교 건설시스템공학과 석사과정
3서울과학기술대학교 건설시스템공학과 조교수
†Corresponding Author
31 August 2024. pp. 233-241
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Abstract

In this study, finite element analyses of coated steel pipes were conducted to research the development of sensing-based monitoring smart pipes. The coated steel pipes underwent a chemical coating pretreatment process that used modified polyethylene on both the inside and outside surfaces. Furthermore, the steel pipes were designed to minimize damage during the expansion process by incorporating connecting parts. To evaluate structural performance under various loads, four loading conditions were established: static structural analysis by earth pressure, fatigue life evaluation by vehicle load, and resistance to water leakage under both tensile and compressive loads. The analysis estimated a higher fatigue life for the developed steel pipe, compared with that of a steel pipe using ready-made epoxy coatings and joints. In addition, an average maximum displacement reduction of 56.1% and a maximum stress reduction of 61.2% were confirmed under identical conditions and diameters, thereby verifying the safety of the connecting parts of the developed coated steel pipe. Furthermore, the results of stress distribution contour analyses revealed superior water leakage resistance at the fastening parts, compared with the centers of the pipes.

Keywords
steel pipe
connection
finite element analysis
polyethylene coating

본 연구에서는 센싱 기반 모니터링 스마트 파이프 개발 연구의 일환으로 화학적 전처리된 코팅 강관에 대한 유한요소해석을 실시하였다. 개발된 코팅 강관은 내･외면 개질 폴리에틸렌으로 화학적 코팅 전처리 과정을 수행하였으며, 확관 시 표면 코팅 손상을 최소화하기 위한 연결 부속을 사용한 코팅 강관의 해석을 수행하였다. 다양한 하중에 대한 구조성능 평가를 위해 토압 하중에 의한 정적 구조해석, 차량 하중에 의한 피로수명 평가, 인장 및 압축 하중에 의한 누수 저항성의 4가지 하중 조건을 설정 및 조사하였다. 해석 결과, 기존 에폭시 코팅 및 조인트 사용 강관 대비 개발 강관에서 개선된 피로 수명이 산출되었으며, 동일 직경의 조건에서 평균 56.1%의 최대 변위 감소와 61.2% 최대 응력이 감소함을 통해 개발 코팅 강관과 연결 부속의 안전성을 검증하였다. 이에 더하여 응력 분포 분석을 통해 체결부의 누수 저항성 역시 강관 중앙면 대비 우수함을 확인하였다.

키워드
강관
연결부
유한요소해석
폴리에틸렌 코팅
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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 :4
  • Pages :233-241
  • Received Date : 2024-06-05
  • Revised Date : 2024-06-15
  • Accepted Date : 2024-06-17
  • DOI :https://doi.org/10.7734/COSEIK.2024.37.4.233
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