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Fatigue strength improvement of welded joints by blast cleaning for subsequent painting

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Abstract

In the fabrication of steel bridges, prior to painting, blast cleaning is performed to clean the surfaces and to increase the adhesive properties of the surfaces for the subsequent painting. In addition to these objectives, blast cleaning can improve the fatigue strength of welded joints, as a result of the impact of forcibly propelled abrasive materials on the welded joints. A series of fatigue tests were carried out on the five different types of welded joints: one-side out-of-plane gusset fillet welded joints, both-side out-of-plane gusset fillet welded joints, non-load-carrying rib fillet welded cruciform joints, butt welded joints, and a large-scale model beam with out-of-plane gusset welded joints, and under the three different types of load conditions: uniaxial tension, out-of-plane bending, or in-plane bending stress cycles. Drawing on previous fatigue test results that include unpublished data, this paper presents the beneficial effects of blast cleaning for the subsequent painting applications on the fatigue strength improvement of welded joints and also presents a simple quality control method for the blast cleaning process that improves the fatigue strength.

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Authors and Affiliations

  1. Department of Civil Engineering, Pusan National University, San 30, Jangjeon-dong, Geumjeong-gu, Busan, 609-735, Korea

    In-Tae Kim

  2. Department of Civil Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819-0395, Japan

    Young-Soo Jeong

Authors
  1. In-Tae Kim
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  2. Young-Soo Jeong
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Correspondence to In-Tae Kim.

Additional information

Note.-Discussion open until August 1, 2013. This manuscript for this paper was submitted for review and possible publication on June 18, 2012; approved on February 19, 2013.

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Kim, IT., Jeong, YS. Fatigue strength improvement of welded joints by blast cleaning for subsequent painting. Int J Steel Struct 13, 11–20 (2013). https://doi.org/10.1007/s13296-013-1002-0

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  • DOI: https://doi.org/10.1007/s13296-013-1002-0

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