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Fire Sci. Eng. > Volume 30(5); 2016 > Article
Fire Science and Engineering 2016;30(5):54-59.
DOI: https://doi.org/10.7731/KIFSE.2016.30.5.054    Published online October 31, 2016.
고온에 노출된 H-형강 압축재의 유한요소해석
이수헌, 이희두, 최준호, 신경재
1경북대학교 건설환경에너지공학부
2경북대학교 건설환경에너지공학부
3부경대학교 소방공학과
4경북대학교 건설환경에너지공학부
Finite Element Analysis of H-Shaped Compressive Member Exposed High Temperatures
Lee Swoo-Heon, Lee Hee-Du, Choi Jun-Ho, Shin Kyung-Jae
1School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University
2School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University
3Department of Fire Protection Engineering, Pukyong National University
4School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University
요약
구조재료 중에서 강재는 불연성 재료이지만 열전도가 높고, 온도상승에 의하여 강성의 저하가 높은 편이다. 일반적으로 강재의 항복강도 및 탄성계수는 $350^{circ}C$에서 70%, $600^{circ}C$에서 50% 이하로 감소하기 때문에 고온에서의 철골구조의 재하능력은 급격히 감소하게 된다. 통상 내화구조로 인정받기 위해서는 공인기관으로부터의 품질시험을 거쳐야 한다. 하지만, 실물내화실험은 공간과 시간의 제약, 고비용의 문제점을 안고 있으므로, 본 연구에서는 ABAQUS 프로그램의 유한요소법을 이용한 열해석을 수행하여 압축을 받는 H-형강기둥의 내화실험과의 비교로 해석모델의 신뢰성을 입증하고, 실물실험의 보완책으로의 가능성을 제시한다.
Abstract
Steel is a structural material that is inherently noncombustible. On the other hand, it has high thermal conductivity and the strength and stiffness of the material are reduced significantly when exposed to fire or high temperatures. Because the yield strength and modulus of elasticity of steel are reduced by 70% at $350^{circ}C$ and less than 50% at $600^{circ}C$, the load-carrying capacity of steel structure at high temperature rapidly lose. To be accepted as a fire-resisting construction, the fire test should be performed at the certificate authority. On the other hand, the fire test on a full-scale structure is limited by time, space, and high-cost. The analytical method was verified by a comparison with the fire test of H-section columns under compression and thermal analysis based on a finite element method using the ABAQUS program, and the numerical analysis method reported in this study was suggested as a complement of an actual fire test.
Key Words: H-Shaped steel, High temperature, Finite element analysis, Fire test, Fire resistance


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