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Effect of Blast Cleaning on Fatigue Behavior of Non-load-carrying Fillet Welded Cruciform Joints  

Kim, In Tae (부산대학교 사회환경시스템공학부)
Jung, Young Soo (부산대학교 사회환경시스템공학부)
Kim, Kwang Jin (부산대학교 사회환경시스템공학부)
Lee, Dong Uk (부경대학교 토목공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.21, no.1, 2009 , pp. 55-62 More about this Journal
Abstract
Blast cleaning has been applied in steel bridges for cleaning forged surface and increasing adhesive property of applied coating systems. Blasting is the operation of cleaning or preparing a surface by forcible propelling a stream of abrasive metals against it. Blast cleaning may improve surface geometry and induce compressive residual stress, and eventually may increase fatigue life of weld joints. In this paper, fatigue tests were carried out on three types of non-load-carrying fillet welded cruciform joints, as-welded joints, blast-treated joints, and stress-relieved joints after blasting, in order to investigate effect of blast cleaning on fatigue behavior of the weld joints. By Blast cleaning, the weld toe radius was increased by 29% and compressive residual stress was induced near weld toes. Blast cleaning increased fatigue life and fatigue endurance limit of the weld joints. When the applied stress ranges decreased, the increment in fatigue life became larger. About a 150% increase in fatigue limit could be realized by using blast cleaning.
Keywords
Steel bridge; Fatigue life; Non-load-carrying fillet welded cruciform joint; Blast cleaning;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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