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International Journal of Steel Structures

, Volume 18, Issue 5, pp 1631–1638 | Cite as

Fatigue Resistance Improvement of Welded Joints by Bristle Roll-Brush Grinding

  • In-Tae Kim
  • Ho-Seob Kim
  • Duy Kien Dao
  • Jin-Hee Ahn
  • Young-Soo Jeong
Article
  • 58 Downloads

Abstract

In the periodic repainting of steel bridges, often the steel surface has to be prepared by using power tools to remove surface contaminants, such as deteriorated paint film and rust, and to increase the adhesive strengths of the paint films to be applied newly. Surface preparation by bristle roll-brush grinding, which is a type of power tool, may additionally introduce compressive residual stress and increase the fatigue resistance of welded joints owing to the impact of rotating bristle tips. In this study, fatigue tests were conducted for longitudinally out-of-plane gusset fillet welded joints and transversely butt-welded joints to evaluate the effect of bristle roll-brush grinding prior to repainting on the fatigue resistance of the welded joints. The test results showed that bristle roll-brush grinding introduced compressive residual stress and significantly increased fatigue limits by over 50%.

Keywords

Fatigue Steel structure Out-of-plane gusset welded joint Butt-welded joint Surface preparation Roll-brush grinding Fatigue resistance improvement 

Notes

Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP; No. NRF-2017R1A2A2A05069679).

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Copyright information

© Korean Society of Steel Construction 2018

Authors and Affiliations

  • In-Tae Kim
    • 1
  • Ho-Seob Kim
    • 1
  • Duy Kien Dao
    • 2
  • Jin-Hee Ahn
    • 3
  • Young-Soo Jeong
    • 4
  1. 1.Department of Civil EngineeringPusan National UniversityBusanKorea
  2. 2.Department of Civil EngineeringHo Chi Minh City University of Technology and EducationHo Chi MinhVietnam
  3. 3.Department of Civil EngineeringGyeongnam National University of Science and TechnologyJinjuKorea
  4. 4.Seismic Simulation Test CenterPusan National UniversityYansanKorea

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