Fatigue Life Analysis of Welded Joints in Spigot-and-Socket Connections for Arch-Beam Structures

Jigang Wu; Wei Su; Hua Li; Zhiwei Liu

doi:10.6919/ICJE.202603_12(3).0006

Fatigue Life Analysis of Welded Joints in Spigot-and-Socket Connections for Arch-Beam Structures

Jigang Wu, Wei Su, Hua Li, Zhiwei Liu

International Core Journal of Engineering, (2026), Vol.12, No.3, pp.53-60

Published: March 19, 2026

DOI: 10.6919/ICJE.202603_12(3).0006

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Abstract

Using finite element numerical simulation, the influence of wind load on the fatigue life of welded joints in spigot-and-socket connections of arch-beam structures was investigated. Two methods were employed: the nominal stress method specified in the Chinese steel structure design standard GB 50017-2017, and the hot-spot stress method based on extrapolation as prescribed in the IIW (International Institute of Welding) documents XIII-1539-96/XV-845-96. The results indicate that the fatigue life predicted by the hot-spot stress method is longer than that obtained from the nominal stress method. Consequently, fatigue analysis based on the nominal stress method yields more conservative results. However, compared with the nominal stress approach, the hot-spot stress method demonstrates better integration with numerical simulation.

Keywords: Numerical Simulation; Weld Fatigue; Nominal Stress; Hot-Spot Stress.

APA Citation: Jigang Wu, Wei Su, Hua Li, Zhiwei Liu (2026). Fatigue Life Analysis of Welded Joints in Spigot-and-Socket Connections for Arch-Beam Structures. International Core Journal of Engineering, 12(3), 53-60. https://doi.org/10.6919/ICJE.202603_12(3).0006

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