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Study on Effect of Anchor Bolt by Thermal Expansion of Sulfur Storage Tank under High Temperature

고온을 받는 유황저장탱크의 열팽창에 의한 앵커볼트 영향에 관한 연구

Wook-Hwan Jung1†
,
Jeong-Soo Kim2
,
Tae-Min Kim1
,
Moon-Kyum Kim1
정 욱 환1†
,
김 정 수2
,
김 태 민1
,
김 문 겸1
1Department of Civil and Environment Engineering, Yonsei University, Seoul, 03722, Korea
2Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang, 10223, Korea
1연세대학교 토목환경공학과
2한국건설기술연구원 구조융합연구소
†Corresponding author : Tel: +82-2-2123-7504; wookhwan@yonsei.ac.kr
2016. pp. 483-490
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Abstract

In plant industry, sulfur storage tank is made of steel and annular plate is connected with concrete foundation of ring wall type by anchor bolt. Due to keep sulfur at high temperature in tank by coil, sulfur storage tank is expanded larger than another tank stores fluid at room temperature. Generally, structural design of tank foundation is performed analysis with loading of temperature gradient between inner and outer surface, this method can’t consider the phenomenon that load is intensively transferred to concrete foundation at anchor bolt. This means that temperature load is underestimated and causes crack of concrete near anchor bolt. In this study, evaluation formula considering temperature load transfer mechanism through anchor bolt is proposed and load acting on concrete foundation is rationally decided. For this purpose, it is analyzed variation of thermal load per various anchor bolt number using finite element model including tank annular plate and anchor bolt. Solution is proposed as specified term combining result of analysis and theoretical solution for evaluating load transferred by anchor bolt. For confirmation of validation of proposed formula, it is applied in design of sulfur storage tank at plant site, it shows that the formula can be practically applied.

Keywords
sulfur storage tank
ring wall foundation
thermal expansion
concrete break out
anchor bolt

플랜트의 유황 저장 탱크는 강재로 구성되며, 탱크 저면은 앵커볼트에 의해 Ring Wall 형상의 콘크리트 기초와 연결된다. 탱크 내 유황이 내부 열원에 의해 고온상태를 유지하기 때문에, 유황 저장 탱크는 상온의 유체를 저장하는 다른 탱크에 비해 큰 체적팽창을 겪게 된다. 일반적으로 탱크 기초의 구조설계는 기초의 내외부의 온도차를 하중으로 적용한 구조해석이 수행 되는데, 이 방법은 탱크의 열팽창 특성이 앵커볼트에 의해 집중하중 형태로 콘크리트 기초에 전달되는 현상을 고려할 수 없 다. 이는 온도하중의 영향을 과소평가하게 되며, 앵커볼트에 인접한 콘크리트의 균열을 야기한다. 본 연구는 앵커볼트에 의 한 온도 하중전달 메커니즘을 고려한 하중 평가식을 제안함으로써, 콘크리트 기초에 작용하는 하중을 보다 합리적으로 결정 하고자 한다. 이를 위해 탱크 바닥판과 앵커볼트가 포함된 유한요소모델을 이용해 앵커볼트 개수 증감에 따른 온도하중의 변화를 분석하였으며, 분석결과를 이론해와 결합해 앵커볼트에 의해 전달되는 하중을 평가할 수 있는 명시적인 형태로 해를 제시하였다. 제안된 식의 유효성을 확인하기 위해 실제 플랜트 현장의 유황 저장 탱크 설계에 적용하였으며, 실무적으로 사 용 가능함을 보였다.

키워드
유황 저장 탱크
Ring Wall 기초
열팽창
콘크리트 Break out
앵커볼트
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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 : 29
  • No :5
  • Pages :483-490
  • Received Date : 2016-08-23
  • Revised Date : 2016-09-01
  • Accepted Date : 2016-09-05
  • DOI :https://doi.org/10.7734/COSEIK.2016.29.5.483
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