Tensile and high-cycle fatigue performance of HRB500 high-strength steel rebars joined by flash butt welding

Sheng, Xingwang; Zheng, Weiqi; Yang, Ying

doi:10.1016/j.conbuildmat.2020.118037

Cited by 14 publications

(6 citation statements)

References 32 publications

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“…In contrast to the fragmentary knowledge of concrete fatigue and its interaction with reinforcement, the description of steel fatigue (2) is based on a much deeper knowledge of the fatigue mechanisms in its polycrystalline material structure. [30][31][32][33][34][35] Therefore, well-established design concepts for steel fatigue based on S-N curves are provided in the design codes. 14,[36][37][38] In reinforced members, fatigue fracture interacts with the fatigue degradation of the bond between concrete and steel, and induces stress redistribution leading to crack widths exceeding the serviceability limit, 39 as documented by a significant number of structural tests investigating the flexural/shear fatigue behavior of RC members with and without shear reinforcement.…”

Section: Steel Fatiguementioning

confidence: 99%

Section: Tensile Zonesmentioning

confidence: 99%

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Stress configuration‐based classification of current research on fatigue of reinforced and prestressed concrete

Baktheer,

Goralski,

Hegger

et al. 2024

Structural Concrete

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The limited understanding of the fatigue behavior of reinforced and prestressed concrete members is one of the reasons why many structures do not reach their expected service life. Without a deeper theoretical understanding of the fatigue phenomena in the various fatigue process zones, reliable fatigue life predictions are not possible. This paper provides a classification of the major fatigue process zones and mechanisms in reinforced and prestressed concrete members, accompanied by a brief review of recent developments in design rules, experimental characterization, and modeling approaches specific to each fatigue process zone and mechanism. The limitations of current approaches to fatigue characterization and modeling are also discussed, highlighting the need for further research in this area.

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Section: Steel Fatiguementioning

confidence: 99%

Section: Tensile Zonesmentioning

confidence: 99%

Stress configuration‐based classification of current research on fatigue of reinforced and prestressed concrete

Baktheer,

Goralski,

Hegger

et al. 2024

Structural Concrete

View full text Add to dashboard Cite

show abstract

“…Referring to the relevant literature [9][10][11][12], the specimen was designed as a cross connection of two steel bars, one of which was a 300 mm long steel bar and one was a 40 mm short steel bar, as shown in Fig. 1.…”

Section: Specimensmentioning

confidence: 99%

Research on Welding Parameters of Steel Fabric for High-Speed Railway Simply-Supported Box Girder

Niu,

Zhang,

Zhang

et al. 2023

Advances in Frontier Research on Engineering Structures

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The intelligent construction technology of the steel skeleton of high-speed railway simply-supported box girders upgrades the steel fabric from manual construction to automatic welding construction. The welding parameters of cross-welded steel bars in steel fabric are directly related to the static welding strength and the fatigue performance. To determine the welding parameters of cross-welded steel bars, five groups of specimens were designed and the welding time was used as the welding parameter. Through the static tensile and fatigue test, the results show that it is not that the longer the welding time, the greater the static strength and fatigue life of the specimen. There is an optimal value of welding time. Finally, the welding time corresponding to the N3 was selected as the best welding parameter. The research results of this paper provide technical support for the subsequent steel welding fatigue test.

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“…Flash butt welding has the advantages of high thermal efficiency, no need to add welding rod metal, short welding cycle and so on. After matching welding parameters, high quality joints can be obtained [5] . However, the flash butt welding process of quantifying multiple process parameters is complicated [6] .…”

Section: Introductionmentioning

confidence: 99%

Flash butt welding on microstructures and mechanical properties of joints for high strength acid resistant steel

et al. 2023

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In this research, the 600 MPa acid resistant steel was used as flash butt welding base material, to study the effect of different upset allowance on the microstructure and mechanical properties of the joints. The results can be obtained as follows: with the increase of the upset allowance, it has a significant effect on the elongation, the ferrite content in the heat affected zone increases, and the joint strength first increases and then slowly decreases. When the upset allowance is bigger than 4mm, there are wide and large bainitic ferrites in the coarse grained zone, the joint strength deteriorates sharply. When the upset allowance is 3-4mm, the mechanical properties of the welded sample are the best, the tensile strength is 686-708MPa, the yield strength is 610-636MPa, the elongation is higher than 13.77%. The steel matrix can be strengthened effectively by forming grain refinement and dispersed granular bainite with proper upset allowance. The different hardness distributions of welded joints to display the difference of microstructure in different regions.

show abstract

Tensile and high-cycle fatigue performance of HRB500 high-strength steel rebars joined by flash butt welding

Cited by 14 publications

References 32 publications

Stress configuration‐based classification of current research on fatigue of reinforced and prestressed concrete

Stress configuration‐based classification of current research on fatigue of reinforced and prestressed concrete

Research on Welding Parameters of Steel Fabric for High-Speed Railway Simply-Supported Box Girder

Flash butt welding on microstructures and mechanical properties of joints for high strength acid resistant steel

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