An Experimental Study on the Fatigue Strength of Repair Welded Joints of Old Steel Bridge

신판교체 보수 용접부의 피로강도에 관한 실험적 연구

  • 박현찬 (중앙대학교토목공학과) ;
  • 이진형 (한국철도기술연구원 기존철도사업단) ;
  • 김재환 (중앙대학교토목공학과) ;
  • 장갑철 (중앙대학교토목공학과) ;
  • 장경호 (중앙대학교 건설환경공학과)
  • Published : 2006.05.01

Abstract

Recently, steel structures have been increasing because of its brilliant features. In general, cracks and corrosion are produced due to the numerous environmental factors in steel structures. However, the validity of repair method for the damaged steel structures has not been fully verified because of its lack of safety and reliability after application. Moreover, repair method by welding inevitably involves cutting and welding processes and reliability for the safety during the processes has net been established yet. Therefore, this study carried out experiments on the fatigue strength of repair welded joints of old steel bridge to investigate the fatigue characteristics in the repair welded joints. Fatigue tests were conducted by 250kN capacity MIS with the frequency of 5Hz under amplitude loading. From the results, it is known that fatigue strength grade of the repair welded joints was satisfied with C grade which specification requires.

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