Review of Fatigue Behavior in Welded Tubular Joints(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2017年05期
- Page:
- 1-20
- Research Field:
- Publishing date:
Info
- Title:
- Review of Fatigue Behavior in Welded Tubular Joints
- Author(s):
- LIU Yong-jian; JIANG Lei; WANG Kang-ning
- School of Highway, Chang’an University
- Keywords:
- bridge engineering; welded tubular joint; fatigue behavior; assessment method; hot spot stress concentration factor; newtype joint; review
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to deepen the understanding of fatigue problem of welded tubular joints, the application status and existing problems of four frequently used assessment approaches including nominal stress approach, hot spot stress approach, notch stress approach and fracture mechanics approach were introduced. The current research of hot spot stress approach, which was the most suggested, was summarized in the aspects of fatigue effect and fatigue resistance. The structural development trend of tubular joints was explored. The results show that in the four frequently used approaches, the nominal stress approach is the most widely used, but it is overconservative. The hot spot strees approach is the most suggested and it needs to be perfected. The notch stress approach will be applicable in an assessment of residual fatigue life. The comparatively systematic hot spot strees approach is proposed for traditional circular and rectangular tubular joints, and possible position of maximum hot spot stress, extrapolation region, equations for hot spot stress concentration factor, thickness correction factors are specified. Based on the traditional circular and rectangular tubular joints, the structure of joints is innovated, and the concrete filled steel tube joints, concrete filled steel tube joints stiffened with PBL, circular hollow sectionrectangular hollow section(CHS-RHS) joints, birdbeak square hollow section(SHS) joints are proposed. Comparing with traditional joints, the hot spot stress concentration factor of concrete filled steel tube joints and concrete filled steel tube joints stiffened with PBL reduce more than 25% and 50% respectively. The hot spot stress concentration factor of birdbeak SHS joints is between circular tubular joints and rectangular tubular joints.
Last Update: 2017-09-11