Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Elastic Buckling of Monosymmetric I-beams considering Load Height Effects

하중고 효과를 고려한 일축대칭 I형보의 탄성 좌굴

  • 류효진 (충남대학교 토목환경공학부) ;
  • 박경현 (충남대학교 토목환경공학부) ;
  • 김정훈 (고려대학교 건축.사회환경공학과) ;
  • 임남형 (충남대학교 토목환경공학부)
  • Received : 2007.11.07
  • Accepted : 2008.01.09
  • Published : 2008.02.20
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Abstract

Finite element buckling analyses of the monosymmetric I-beams subjected to t ransverse loading applied at different heights with respect to the mid-height of the cross section were conducted. Transverse loads consisting of a mid-span point load and a uniformly distributed load were considered in the investigation. The method suggested in the SRC Guide was compared with the finite element method (FEM) results. This paper presents a more accurate moment gradient correction factor for monosymetric I-beams considering the load height effect. The applicability of this new design method is limited to monosymmetric I-beams in which the degree of monosymetry, ${\rho}$, is from 0.1 to 0.9.

단면 내 임의의 높이에 작용하는 연직방향 하중에 대한 일축대칭 I형보의 유한요소 좌굴해석을 실시하였으며 연직방향 하중은 지간중앙에 작용하는 집중하중과 등분포 하중이 고려되었다. SRC 지침서에 제시된 방법과 유한요소 좌굴해석 결과와의 비교를 통해 본 논문에서는 하중고 효과가 고려된 일축대칭 I형단면의 모멘트 구배 수정 계수를 제안하였다. 제안된 방법은 일축대칭도가 0.1에 서 0.9까지인 일축대칭 I형 보에 적용된다.

Keywords

References

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