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Local–overall buckling behavior of corroded intermediate compression-bending H-section steel columns
Abstract The primary aim of this paper is to assess the impact of corrosion damage on intermediate H-section steel columns subjected to combined compression and bending about the strong axis. The study conducted a comprehensive investigation into the corrosion-induced transition in the buckling behavior of steel columns through experimental and numerical analyses. Six H-section Q355 steel intermediate columns were designed, with five undergoing an artificial spray-accelerated corrosion process. The three-dimensional scanning technology was employed to quantify the general corrosion and corrosion pits. Eccentric compression tests were carried out on intermediate H-section steel columns to investigate the effect of the different corrosion levels on the failure mode and load-displacement curves, as well as to determine local buckling load based on the load-strain curves. The test results showed that the corrosion characteristic parameters of each cross-section of the steel column exhibited irregularity and variation in all locations, reflecting the heterogeneity of corrosion. The density of corrosion pits exhibited a decreasing trend with increased corrosion duration. Corrosion remarkably reduced both the ultimate carrying capacity and local buckling capacity, with the most severely corroded specimen exhibiting an average cross-sectional area loss rate of 37 %, resulting in a 43 % and 51 % reduction in ultimate load and buckling load compared to the uncorroded specimen. Furthermore, the corrosion features substantially influenced the failure mode, resulting in a transition from overall buckling to local buckling or local-global interaction buckling. A numerical methodology was developed to incorporate the actual surface morphology of corrosion, and the reliability of the modeling method was validated through comparison with experimental results, further revealing the failure mechanism of corroded intermediate H-section steel columns under compression and bending about the strong axis.
Highlights Quantitatively characterized the impact of corrosion on the geometric characteristics of steel columns. The effect of corrosion on the buckling behavior of intermediate compression-bending corroded H-shaped steel columns. Established a morphology-based numerical method to predict the buckling performance of corroded columns. The failure mechanism of the corroded intermediate steel columns was observed and analyzed by tests and simulations.
Local–overall buckling behavior of corroded intermediate compression-bending H-section steel columns
Abstract The primary aim of this paper is to assess the impact of corrosion damage on intermediate H-section steel columns subjected to combined compression and bending about the strong axis. The study conducted a comprehensive investigation into the corrosion-induced transition in the buckling behavior of steel columns through experimental and numerical analyses. Six H-section Q355 steel intermediate columns were designed, with five undergoing an artificial spray-accelerated corrosion process. The three-dimensional scanning technology was employed to quantify the general corrosion and corrosion pits. Eccentric compression tests were carried out on intermediate H-section steel columns to investigate the effect of the different corrosion levels on the failure mode and load-displacement curves, as well as to determine local buckling load based on the load-strain curves. The test results showed that the corrosion characteristic parameters of each cross-section of the steel column exhibited irregularity and variation in all locations, reflecting the heterogeneity of corrosion. The density of corrosion pits exhibited a decreasing trend with increased corrosion duration. Corrosion remarkably reduced both the ultimate carrying capacity and local buckling capacity, with the most severely corroded specimen exhibiting an average cross-sectional area loss rate of 37 %, resulting in a 43 % and 51 % reduction in ultimate load and buckling load compared to the uncorroded specimen. Furthermore, the corrosion features substantially influenced the failure mode, resulting in a transition from overall buckling to local buckling or local-global interaction buckling. A numerical methodology was developed to incorporate the actual surface morphology of corrosion, and the reliability of the modeling method was validated through comparison with experimental results, further revealing the failure mechanism of corroded intermediate H-section steel columns under compression and bending about the strong axis.
Highlights Quantitatively characterized the impact of corrosion on the geometric characteristics of steel columns. The effect of corrosion on the buckling behavior of intermediate compression-bending corroded H-shaped steel columns. Established a morphology-based numerical method to predict the buckling performance of corroded columns. The failure mechanism of the corroded intermediate steel columns was observed and analyzed by tests and simulations.
Local–overall buckling behavior of corroded intermediate compression-bending H-section steel columns
Xue, Qianzhi (author) / Xu, Shanhua (author) / Li, Anbang (author) / Wang, Youde (author)
Engineering Structures ; 308
2024-04-08
Article (Journal)
Electronic Resource
English
Local and local-overall buckling behaviour of welded stainless steel box section columns
| British Library Conference Proceedings | 2015