Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Torsional Behavior of Hybrid Truss Bridge according to Connection Systems

복합트러스교의 격점구조별 비틀림 거동

  • Jung, Kwang-Hoe (Research & Development Division, Hyundai Engineering & Construction) ;
  • Lee, Sang-Hyu (Research & Development Division, Hyundai Engineering & Construction) ;
  • Yi, Jong-Won (Research & Development Division, Hyundai Engineering & Construction) ;
  • Choi, Ji-Hun (School of Civil and Environmental Engineering, Yonsei University) ;
  • Kim, Jang-Ho Jay (School of Civil and Environmental Engineering, Yonsei University)
  • 정광회 (현대건설(주) 연구개발본부) ;
  • 이상휴 (현대건설(주) 연구개발본부) ;
  • 이종원 (현대건설(주) 연구개발본부) ;
  • 최지훈 (연세대학교 사회환경시스템공학부) ;
  • 김장호 (연세대학교 사회환경시스템공학부)
  • Received : 2012.08.29
  • Accepted : 2012.11.02
  • Published : 2013.02.28
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Abstract

HTB (hybrid truss bridge) steel truss webs instead of concrete webs in prestressed box girder bridges has been widely used in, because of its structural benefit such as relatively less self-weight and good aesthetics due to open web structure. Since the core technology of this bridge is the connection system between concrete slabs and steel truss members, several connection systems were proposed and experimentally evaluated. Also, the selected joint system was applied to the real bride design and construction. The researches were performed on the connection system, since it can affect the global behavior of this bridge such as flexural and fatigue behaviors as well as the local behavior around the connection region. The evaluation study showned that HTB applied to a curved bridge or a eccentric loading bridge, characteristic has a weak torsional capacity compared to an ordinary PSC box girder bridges due to the open structure of HTB. In this study, three box shaped hybrid truss specimens were made and the torsional test and evaluation for them were performed in order to find out the torsional behavior of HTB according to the connection system.

복합트러스교는 프리스트레스 박스거더교의 복부를 강재 트러스로 대체한 교량으로 자중이 경감되는 구조적 장점과 복부 개방구조로 인한 경관성이 매우 우수하여 최근 들어 많이 사용되고 있다. 이러한 복합트러스교의 핵심기술은 강재 트러스와 콘크리트 슬래브를 연결하는 격점구조이며 지금까지 여러가지 격점구조들이 개발되어 실험적 검증을 통해서 실교량에 적용해 오고 있다. 이러한 격점구조는 격점부 국부적인 거동뿐만 아니라 복합트러스 거더의 휨 및 피로 등 전체적인 거동을 좌우하기 때문에 이에 대한 연구가 계속 진행되고 있다. 한편, 복합트러스 교량의 복부 개방구조는 프리스트레스 박스교량에 비해 비틀림 성능을 저하시키는 단점을 가지고 있어 편심하중을 받는 교량이나 곡선교 등에는 아직까지 적용된 사례가 없다. 따라서 복합트러스교가 보다 널리 사용되기 위해서는 비틀림 거동에 대한 정확한 분석이 필요한 상황이다. 이 연구에서는 복합트러스교의 격점구조 형식에 따른 비틀림 거동 특성을 알아보기 위해서 3가지 형태의 박스형 복합트러스 실험체를 제작하여 비틀림 실험을 수행하고 분석해 보았다.

Keywords

References

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  1. Analysis Evaluation of Torsional Behavior of Hybrid Truss Bridge according to Connection Systems vol.26, pp.1, 2014, https://doi.org/10.4334/JKCI.2014.26.1.003