A Study on Plastic Fatigue of Structural Steel Elements under Cyclic Loading

반복하중을 받는 강구조 요소의 소성피로에 관한 연구

  • 박연수 (전남대학교 공과대학 토목공학과) ;
  • 박선준 (전남대학교대학원 토목공학과) ;
  • 강성후 (동신대학교 공과대학 토목공학과) ;
  • 윤영필 (목포실업전문대학 토목과)
  • Received : 1997.04.21
  • Published : 1997.06.30

Abstract

In order to quantify the relationships of the important physical factors relating failure to strong earthquake loading, the plastic fatigue problems for structural components under repeated loading were reviewed first. A new concept of very low cycle fatigue failure for structural components under severe cyclic excitations as in strong earthquakes was represented. Also, an experimental study was made of the very low cycle fatigue failure of structural steel elements. It was attempted to realize the ultimate failure in the course of loading repetitions of the order of several to twenty. The test specimen had a form of rectangular plate, representing a thin-plated element in a steel member as wide-flange cross section. It was subjected to uniaxial loading repeatedly, until complete failure takes place after undergoing inelastic buckling, plastic elongation and/or their combination. It was seen as a result that the state of the ultimate failure is closely related to the maximum strain at the extreme fiber in the cross section.

Acknowledgement

Supported by : 전남대학교

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