Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Evaluation on Applicability of Stress Relief Hole for Improvement of Fatigue Stress Capacity of Steel Structural Details

강구조상세부의 피로저항능력 개선을 위한 응력완화홀 적용성 평가

  • Jung, Kyoung Sup (School of Civil Engineering, Chungbuk National University) ;
  • Nam, Seung Hoon (Department of Structural Systems Engineering, Chungbuk National University) ;
  • Kim, Kyoung Nam (Institute of Construction Technology, Chungbuk National University) ;
  • Yang, Keon Bong (Department of Structural Systems Engineering, Chungbuk National University)
  • 정경섭 (충북대학교, 토목공학부) ;
  • 남승훈 (충북대학교, 구조시스템공학과) ;
  • 김경남 (충북대학교, 건설기술연구소) ;
  • 양건봉 (충북대학교, 토목시스템공학과)
  • Received : 2013.03.11
  • Accepted : 2013.08.06
  • Published : 2013.10.27
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Abstract

In steel bridges, there are several details that constrain the deformation such as buckling by external forces. Most of these details which are composed of the intersection members have scallops in order to exclude the weld defects inherently and to get the ease of fabrication and also to decrease the stress concentration. In this study, stress relief hole (SRH) near stress concentration zone with detail category D or under is proposed as a method to improve the resistance on the fatigue crack initiation to detail category C. And the effects of the appropriate size and location of SRH were examined and the applicability to improve the fatigue resistance of the floorbeam web and the rib wall at rib/floorbeam intersection in the orthotropic steel deck bridge was evaluated.

강교량에는 외력에 대해 저항하는 부재의 좌굴 등의 변형을 구속시키기 위한 여러 상세부들이 존재한다. 이들 상세부는 상호 교차하는 부재들로 구성되고 제작의 용이성, 용접결함의 원천적 배제 및 응력집중을 완화시키기 위해 스켈럽을 이용해 왔다. 본 연구에서는 교차부에 발생되는 응력집중으로 상세범주 D등급 이하를 갖게 되는 강교량 상세부의 피로저항 능력을 상세범주 C등급 이상으로 개선시키는 방안으로 응력완화홀(SRH)을 제안하였다. 적절한 크기 및 위치의 SRH 효과를 확인하고 이를 강바닥판교의 U-rib와 가로보 교차부에 작용시켜 SRH에 의한 피로저항능력 개선 가능성을 확인하였다.

Keywords

References

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