Fatigue Strength Improvement of Welded Joints of Existing Steel Bridges by Shot-Peening

Kinoshita, Koji; Banno, Yuki; Ono, Yuki; Yamada, Shohey; Handa, Mitsuru

doi:10.1007/s13296-018-0140-9

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…Yuan et al (2019d) and Wang et al (2019l) adopted UHPC as the structural layer to investigate the enhancement effect of light composite bridge deck structure. Kinoshita et al (2019a) strengthened the welded joints of steel bridge with ultrasonic impact method, demonstrating that ultrasonic impact could effectively decrease the stress concentration of the welded joints, reduce the local microscopic defects of the weld toe at welded joints and welding residual stress, and significantly improve the fatigue resistance of the welded joints of the steel bridge. So far, the studies are mainly non-penetrating fatigue crack, and there is still a lack of investigation on the reinforcement method of penetrating fatigue crack in real bridges.…”

Section: Steel Bridge Fatiguementioning

confidence: 99%

Review of annual progress of bridge engineering in 2019

Zhao

Yuan

Wei

et al. 2020

ABEN

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Bridge construction is one of the cores of traffic infrastructure construction. To better develop relevant bridge science, this paper introduces the main research progress in China and abroad in 2019 from 13 aspects, including concrete bridges and the high-performance materials, the latest research on steel-concrete composite girders, advances in box girder and cable-supported bridge analysis theories, advance in steel bridges, the theory of bridge evaluation and reinforcement, bridge model tests and new testing techniques, steel bridge fatigue, wind resistance of bridges, vehicle-bridge interactions, progress in seismic design of bridges, bridge hydrodynamics, bridge informatization and intelligent bridge and prefabricated concrete bridge structures.

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Section: Steel Bridge Fatiguementioning

confidence: 99%

Review of annual progress of bridge engineering in 2019

Zhao

Yuan

Wei

et al. 2020

ABEN

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“…An overview on the published literature of shot peening, together with other residual stress-related PWT techniques was undertaken by Farajian et al [6] within the Working Group 6 (Residual Stress Effects in Fatigue) activities. Shot peening has also been successfully introduced to enhance and retrofit the fatigue strength of existing steel bridges [7,8].…”

Section: Introductionmentioning

confidence: 99%

Fatigue strength of shot-peened as-welded joints and post-weld-treated and subsequently clean-blasted fillet weld joints

et al. 2023

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Surface treatment methods, such as shot peening and clean blasting, can improve the fatigue strength of welded joints. The aim of the current work is to experimentally evaluate the effects of clean blasting on the fatigue performance of post-weld-treated joints made of normal, high-strength, and ultra-high-strength steels, as well as obtain the fatigue strength improvement gained by the shot peening processes in welded connections made of different steel grades using literature data. A literature review was carried out to extract fatigue test data of welded joints, considering both clean blasting and shot peening processes. This data was statistically re-evaluated and used for a comparison to the results obtained in the current experimental work which focuses on evaluating the improvement gained by the clean blasting after post-weld treatments. Experimental fatigue tests were carried out on non-load-carrying transverse attachment joints prepared with gas metal arc welding, and made of S355, S700, and S1100 structural steels. TIG dressing and HFMI treatment post-weld treatments were implemented and, subsequently, the specimens were blast-cleaned using two different abrasives: corundum and sand. The re-analysis of existing fatigue test data indicated higher improvement by shot peening, i.e., average improvements of 1.71 and 1.52 in the fatigue strength for butt weld and fillet weld joints, respectively, than by clean blasting process for which an average improvement of 1.19 in fatigue strength was obtained. The enhancement factors, however, highly varied among different data sets indicating a clear impact of processing parameters on the improvement level. The statistical re-analyses considering all data sets of shot-peened specimens (butt weld and fillet weld joints) showed that one fatigue (FAT) class higher fatigue strength could be recommended for shot-peened joints compared to the as-welded condition with weld toe failures. The experimental work on the post-weld-treated joints indicated that the fatigue strength of clean-blasted joints was similar to that of non-blasted joints, and thus showing no major advantages or disadvantages by the clean blasting post-weld-treated joints with corundum and sand.

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“…Yamada et al studied the effect of ICR (Impact Crack-Closure Retrofit) treatment on fatigue cracks, which reduced their growth rate [17]. Kinoshita et al investigated the effects of fatigue strength improvement of shot-peening on welded joints [18]. Tai et al studied the improvement of welded joints by peening treatment from the viewpoints of stress concentration, residual stress distribution, plastic deformation, and crack propagation behavior [19].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Tests and Failure Mechanism of Rib-to-Deck Welded Joints in Steel Bridge

Fan¹,

Wang³

et al. 2023

Sustainability

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The fatigue cracks of rib-to-deck welded joints in an orthotropic steel deck are one of the critical conundrums that restrict the sustainable development of steel bridges. Double-sided welded joints were achieved by introducing internal welding technology to overcome the initial “crack-like” manufacturing defects at the welding roots of single-sided welded joints. Through the observation of the macro-section of the welded joint, the differences between single-sided welding, partial-penetration welding, and full-penetration welding in rib-to-deck welded joints are compared. Relying on the Shenzhen–Zhongshan link, the fatigue failure and mechanism of single-sided rib-to-deck welded joints are clarified by the nominal stress and structural stress methods, and those of double-sided welded joints were determined through fatigue tests. The fatigue strength of rib-to-deck welded joints is higher than the FAT90 of Chinese standard and the FAT C joints of American standard. The fatigue strength of double-sided rib-to-deck welded joints is significantly higher than that of single-sided welded joints. The fatigue strength of rib-to-deck welded joints is within a ± 2σ range of main S-N curves by the structural stress method. It is suggested to adopt the double-sided welded joints in practice, and to ensure that the penetration rate is beyond 80%. The trial data are limited, and further tests are needed to confirm the results.

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Fatigue Strength Improvement of Welded Joints of Existing Steel Bridges by Shot-Peening

Cited by 8 publications

References 5 publications

Review of annual progress of bridge engineering in 2019

Review of annual progress of bridge engineering in 2019

Fatigue strength of shot-peened as-welded joints and post-weld-treated and subsequently clean-blasted fillet weld joints

Fatigue Tests and Failure Mechanism of Rib-to-Deck Welded Joints in Steel Bridge

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