Experimental and simulation analysis of mechanical property degradation of corrosion thinning of Q355 steel for transmission towers
Abstract
Purpose
Corrosion thinning reduces the effective cross-sectional areas of steel structures and degrades their mechanical properties. This study aims to investigate the relationship between the corrosion thinning of carbon steel for transmission towers and the degradation of its mechanical properties.
Design/methodology/approach
A macroscopic finite element model of a transmission tower was established and then combined with the corrosion thinning and mechanical properties of Q355 steel in different test periods measured in neutral salt spray, SO2 atmosphere and wet heat environments to conduct a finite element simulation of a transmission tower with different corrosion thinning of Q355 steel.
Findings
When the residual thickness of the tower leg angle was reduced to 4.03 mm, the maximum stress solved in the simulation exceeded the yield strength, with the tower already at risk of collapse owing to corrosion failure under extreme conditions of basic wind speed.
Originality/value
This study innovatively utilises transmission tower finite element models and experimental data from mechanical degradation experiments to quantify the relationship between corrosion thinning and the mechanical properties of Q355 steel, ensuring the effective assessment of the mechanical properties of corroded transmission towers.
Keywords
Acknowledgements
This research was supported by the State Grid Corporation of China headquarters science and technology project (Grant No. 5200-202016471A-0–0-00), while we would also like to thank Editage (www.editage.cn) for English language editing.
Conflict of interest statement: The authors declare no conflict of interest.
Data availability statement: The data that support the findings of this study are available from the corresponding author upon reasonable request.
Citation
Guo, X., Tu, J., Fan, Z., Du, B., Shang, H., An, J. and Jia, D. (2024), "Experimental and simulation analysis of mechanical property degradation of corrosion thinning of Q355 steel for transmission towers", Anti-Corrosion Methods and Materials, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/ACMM-03-2024-2982
Publisher
:Emerald Publishing Limited
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