한국산학기술학회논문지 (Journal of the Korea Academia-Industrial cooperation Society)

  • 제10권5호
  • /
  • Pages.1020-1025
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  • 2009
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  • 1975-4701(pISSN)
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  • 2288-4688(eISSN)
한국산학기술학회 (The Korea Academia-Industrial cooperation Society)
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순수 휨하중을 받는 일축대칭 양단스텝보의 횡-비틀림 좌굴 강도

Lateral- Torsional Buckling Strength of Monosymmetric Doubly Stepped I-Beam subjected to Pure Bending

  • 박종섭 (상명대학교 건설시스템공학과) ;
  • 오정재 (상명대학교 건설시스템공학과)
  • Park, Jong-Sup (Department of Civil Engineering, Sangmyung University) ;
  • Oh, Jeong-Jae (Department of Civil Engineering, Sangmyung University)
  • 발행 : 2009.05.31
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초록

본 연구에서는 유한요소해석을 통하여 순수휨을 받는 계단식 변단면 일축대칭 I형보의 탄성 횡-비틀림 좌굴강도 산정법에 대해 설계식 개발이 수행되었다. 유한요소해석결과는 새로운 강도계산식 개발에 활용되었으며, 제안된 강도식은 해석결과와 잘 일치하는 결과를 나타내었다. 새로운 좌굴강도 제안식은 해석결과와 비교하여 $-11%{\sim}2%$의 오차범위를 나타내고 있으며, 모멘트 구매계수가 고려되지 않는다면 간편하게 안전측으로 설계에 적극 활용 가능하다. 또한, 다양한 하중 즉 집중하중, 등분포하중, 및 일련의 집중하중이 작용하는 일축대칭 변단면 부재의 좌굴강도 산정식 개발에 크게 기여하게 될 것이다.

This study investigates elastic lateral-torsional buckling(LTB) of monosymmetric doubly stepped I-beams subjected to pure bending based on finite element analysis(FEA). The results from the FEA are used for new design stepped equation, Cst. The equations are compared with the results from the FEA. The comparison indicates that the new equation provides a good relation with the FEA results. The maximum difference between two results is of 11%. The new equation could be easily used to calculate the elastic lateral-torsional buckling moment resistance of monosymmetric stepped I-beams and to expand the new equation for developing LTB equations of monosymmetric stepped beams subjected to general loading conditions such as a concentrated load, distributed load, or a seres of concentrated load.

키워드

참고문헌

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피인용 문헌

  1. Inelastic Buckling Strength of Stepped I-Beams at Midspan Subjected to Uniform Bending vol.18, pp.5, 2018, https://doi.org/10.9798/KOSHAM.2018.18.5.185