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

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Design Consideration of Fish-bone Girder Pier using the Analysis of Torsional Behavior

조립식 경골잔교(Fish-bone Girder Pier)의 비틀림 거동분석을 통한 설계 시 고려사항

  • Yun, Kyung-Min (Department of Civil Engineering, Chungnam National University) ;
  • Yoon, Ki-Yong (Department of Civil Engineering, Sunmoon University) ;
  • Lee, Chin-Ok (Department of Civil Engineering, Chungnam National University) ;
  • Lim, Nam-Hyoung (Department of Civil Engineering, Chungnam National University)
  • Received : 2013.11.28
  • Accepted : 2014.01.09
  • Published : 2014.01.31
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Abstract

A modular fish-bone girder pier consists of one main girder system named as "Spine Girder". Therefore, this pier can be most affected by torsion as well as flexural bending. The design considerations of the fish-bone girder pier are proposed to assure the reasonable design in this study. In order to investigate the behavior characteristics, structural analysis F.E model is developed, and the verification of the developed model is performed by comparison with experimental data. From the investigation of the structural behavior, the vertical stiffener is required at the bottom of bone-beams to prevent the excessive local stress. Also, it is found that the normal stress of the flange and the shear stress of the web and flange are dominantly affected by the warping torsion and pure torsion, respectively.

조립식 경골잔교는 Spine-girder인 단일거더 시스템이므로 휨 뿐만 아니라 비틀림에 큰 영향을 받는 구조물이다. 본 연구에서는 경골잔교의 합리적인 설계를 위하여 설계 시 고려사항을 도출하고자 하였다. 거동분석을 위한 구조해석 유한요소모델을 개발하고, 실험 결과와 비교하여 타당성을 검증하였다. 경골잔교의 거동분석을 통하여 국부적인 과대응력 발생을 방지하기 위하여 Bone-beam 하단부에 보강재 설치가 필요하며, 플랜지의 법선응력은 ?비틂, 플랜지와 웹의 전단응력은 순수비틂에 의한 영향이 지배적으로 작용하는 것을 확인하였다.

Keywords

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