Fatigue life evaluation of welded joints in steel bridge considering residual stress

Cui, Chuang; Zhang, Qinghua; Bao, Yi; Bu, Yizhi; Luo, Ying

doi:10.1016/j.jcsr.2018.11.003

Cited by 48 publications

(13 citation statements)

References 26 publications

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“…Gao et al (2019) pointed out that the coupling degradation mechanism of fatigue resistance of ocean bridges subjected to vehicle load and complex ocean load, and the interaction mechanism between seawater corrosion and structural fatigue damage still need to be further studied. The deterioration and failure mechanism of fatigue resistance of steel bridge caused by initial manufacturing defects and initial welding residual stresses during the manufacturing process was investigated Cui et al (2019a). The advanced test detection technology to elucidate the microscopic and mesoscopic mechanism of the fatigue crack initiation and propagation process, and clarify the effect mechanism of critical factors on the fatigue performance should be further developed.…”

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

Self Cite

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“…Distribution of hardness at the welded joint always leads to the centerline of the weld (the center is hard and brittle). Weld residual stresses and relaxation have notable effects on fatigue crack propagation in welded joints, and therefore affect the fatigue life of welded joints [12].…”

Section: Literature Reviewmentioning

confidence: 99%

Shielded Metal Arc and Thermite Welding Effect to Residual Stress, Hardness and Crack of R54-Rail Weld Joint

Yurianto¹,

Haryadi²,

Nugroho³

et al. 2020

Journal of Southwest Jiaotong University

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The heating and cooling at the end of the welding process can cause residual stresses that are permanent and remain in the welded joint. This study aims to evaluate the magnitude and direction of residual stresses on the base metal and heat-affected zone of rail joints welded by the manual shielded metal arc and thermite welding. This research supports the feasibility of welding for rail. The material used in this study is the R-54 rail type, and the procedure used two rail samples of one meter long each, welded using manual shielded metal arc welding and thermite welding. The base metal and heat-affected zone of the welded joints were scanned with neutron ray diffraction. The scan produces a spectrum pattern and reveals the direction of the residual stress along with it. We found the strain value contained in both types of welded joints by looking at the microstrain values, which we obtained using the Bragg equation. The results show that the magnitude and direction of the residual stress produced by manual shielded metal arc welding and thermite welding are not the same. Thermite welding produces lower residual stress (lower crack susceptibility) than manual shielded metal arc welding. The melt's freezing starts from the edge to the center of the weld to create random residual stresses. The residual stress results of both the manual shielded metal arc welding and thermite welding are still below the yield strength of the base metal.

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“…When the stiffeners are welded to the base plates, the welding deformation and residual stress are inevitably generated. The high tensile residual welding stress generated near the weld metal decreases the fatigue performance of welded joints [4]. The compressive residual stress generated away from the welded part for balancing the tensile residual stress decreases the buckling strength of the plates [5].…”

Section: Introductionmentioning

confidence: 99%

An Economical and Mechanical Investigation on Local Post-Weld Heat Treatment for Stiffened Steel Plates in Bridge Structures

2021

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A heat treatment is effective for reducing the residual stress of the welded structures. A post-weld heat treatment (PWHT) requires a large heating apparatus (furnace). It requires a high energy, a long time, and a high cost. For examining the possibility of cost and energy saving in PWHT work, an economical and mechanical investigation of the local PWHT to stiffened plate members in steel bridges was conducted. The expense of apparatus for the furnace PWHT was 1.5 times higher than that of local PWHT by sheet-type ceramic heaters. When the number of heater units was reduced and were repeatedly used, the expense for the apparatus became lower. However, it took longer to complete the heat treatment than with the furnace PWHT or the local PWHT with full heater units. The thermal elastic-plastic finite element (FE) analysis examined the effect of local PWHT. The tendency of the stress distribution after the local PWHT differed from the welding residual stress or the stress after the furnace PWHT because of the temperature difference between the heated and the non-heated parts of the local PWHT. However, the effect of residual stress relief by the local PWHT could be almost the same as that of the furnace PWHT.

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Fatigue life evaluation of welded joints in steel bridge considering residual stress

Cited by 48 publications

References 26 publications

Review of annual progress of bridge engineering in 2019

Review of annual progress of bridge engineering in 2019

Shielded Metal Arc and Thermite Welding Effect to Residual Stress, Hardness and Crack of R54-Rail Weld Joint

An Economical and Mechanical Investigation on Local Post-Weld Heat Treatment for Stiffened Steel Plates in Bridge Structures

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