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

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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A Numerical Study on Inplane Nonlinear Buckling Strengths of New Arches Subjected to Uniformly Distributed Loading

수직등분포하중을 받는 신형식단면 원형아치리브의 비선형 면내좌굴강도에 대한 해석연구

  • Park, Jong-Sup (Department of Civil Engineering, Sangmyung University) ;
  • Kang, Sung-Young (Department of Infrastructural Engineering, Sangmyung University)
  • 박종섭 (상명대학교 건설시스템공학과) ;
  • 강성용 (상명대학교 일반대학원 시설공학과)
  • Received : 2011.10.31
  • Accepted : 2012.01.05
  • Published : 2012.01.31
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Abstract

This paper investigates the characteristics of buckling loads for steel arches with new type cross section which is consisted of T-section and pipe-section. A general purpose finite-element program ABAQUS was used to evaluate the inelastic buckling strengths of the arches which included the influence of the geometric and material nonlinearity. According to the comparisons between earlier studies and results from finite-element analyses, new design equations should be developed for the new arches. New buckling factors were developed to consider influence of rise-to-span ratio and boundary conditions. It is found that the presented factors are sufficiently accurate to predict the inplane buckling loads of new type section steel arches subjected to uniformly distributed loading. The proposed equations can be used to investigate new type steel arches subjected to unsymmetrical loading and composited arches.

본 논문에서는 신형식 TO단면이 사용된 양단고정 또는 양단힌지 경계조건을 가지는 원형 강재아치의 비탄성 좌굴에 관한 연구를 수행하였다. 아치의 초기변형과 잔류응력을 고려한 비탄성 유한요소해석을 실시하기 위하여 3차원 유한요소해석 프로그램 ABAQUS가 사용되었다. 기존 연구결과와 유한요소해석결과 비교로부터 새로운 좌굴강도 산정식의 필요성을 확인 할 수 있었으며, 신형식단면 아치구조물의 임계좌굴하중을 간편하게 산정할 수 있는 새로운 좌굴계수식이 세장비 및 경계조건에 따라 제안되었다. 본 연구에서 제안하고 있는 간편 설계식을 이용하여 수직등분포하중을 받는 새로운 TO단면 강재아치의 임계좌굴하중을 합리적으로 산정할 수 있으며, 비대칭하중 및 강합성 아치교량 임계좌굴하중 산정에도 응용될 수 있을 것이다.

Keywords

References

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