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Erschienen in: International Journal of Steel Structures 2/2023

10.01.2023

Probabilistic Tensile Strength Model of Q345 Steel Plates with Random Pitting Corrosion for Fragility Analysis

verfasst von: Xu Liao, Xian Li, Yu-Ming Xu

Erschienen in: International Journal of Steel Structures | Ausgabe 2/2023

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Abstract

To evaluate the fracture behavior of steel structures under some severe corrosion environments, experiments on eight artificially pitting corroded Q345 steel plates and numerical investigations on 200 finite element models of randomly pitting damaged steel were conducted. The effects of the distribution, diameter and depth of the corrosion pits on the tensile behavior were investigated and a probability density function of randomly pitting corroded steel strength was developed. The results indicate that both the yield strength and the ultimate strength of steel plates with random pitting corrosion were lower than those of uniformly corroded steels with the same corrosion ratios. The effects of pitting depth on the yield strength and the ultimate strength were more significant than those of pitting diameter. The influences of pitting distribution on ultimate strength were greater than that on yield strength. The residual tensile strength of steel plates with random pitting corrosion was found to well conform to the Gamma distribution, and thus the probability density functions of the residual yield strength and the ultimate strength were proposed based on the Gamma distribution.

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Literatur
Zurück zum Zitat Daidola, J. C., Parente, J., Orisamolu, I. R., & Ma, K. (1997). Residual strength assessment of pitted plate panels. In Ship Structure Committee Report SSC-394. Daidola, J. C., Parente, J., Orisamolu, I. R., & Ma, K. (1997). Residual strength assessment of pitted plate panels. In Ship Structure Committee Report SSC-394.
Zurück zum Zitat Johnson, G. R., & Cook, W. H. (1983). A constitutive model and data for metals subjected to large strains high strain rates and high temperature. In Proceedings of the 7th international symposium on ballistics (pp. 541–547). International Ballistics Committee, Netherlands. Johnson, G. R., & Cook, W. H. (1983). A constitutive model and data for metals subjected to large strains high strain rates and high temperature. In Proceedings of the 7th international symposium on ballistics (pp. 541–547). International Ballistics Committee, Netherlands.
Zurück zum Zitat National Standards of People’s Republic of China. (2010). GB228.1-2010 Metallic materials—Tensile testing—Part 1: Method of test at room temperature. Beijing: China Standard Press. in Chinese. National Standards of People’s Republic of China. (2010). GB228.1-2010 Metallic materials—Tensile testing—Part 1: Method of test at room temperature. Beijing: China Standard Press. in Chinese.
Metadaten
Titel
Probabilistic Tensile Strength Model of Q345 Steel Plates with Random Pitting Corrosion for Fragility Analysis
verfasst von
Xu Liao
Xian Li
Yu-Ming Xu
Publikationsdatum
10.01.2023
Verlag
Korean Society of Steel Construction
Erschienen in
International Journal of Steel Structures / Ausgabe 2/2023
Print ISSN: 1598-2351
Elektronische ISSN: 2093-6311
DOI
https://doi.org/10.1007/s13296-023-00709-3

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