Author(s)

Raoya Shi ¹

Affiliation(s)

¹ Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing, 100124, China

Corresponding Author

Raoya Shi

ABSTRACT

Concrete-Filled Steel Tube (CFST) columns are widely used in high-rise buildings and bridge structures due to their excellent load-bearing capacity, ductility and construction convenience. However, under the action of corrosive media such as marine environment, industrial pollution or deicing salt erosion, local pitting damage is prone to occur on the surface of the steel tube, resulting in non-uniform thinning of the wall thickness and significant stress concentration, which leads to a serious degradation of the axial compression bearing capacity and durability of the components. To reveal the influence mechanism of random local pitting on the axial compression performance of high-strength CFST columns, a three-dimensional fine finite element model considering multiple random corrosion pits was established based on the Abaqus platform in this paper, and a systematic parametric analysis was carried out using the control variable method. The study focused on the influence of key factors such as volume loss rate (DoV), circumferential corrosion angle, mean corrosion depth, axial height of corrosion and compressive strength of concrete and yield strength of steel on the load-displacement response, stiffness degradation law and failure mode evolution of the column. The results show that local pitting damage significantly weakens the load-bearing capacity of the steel tube section and the constraint effect on the core concrete, leading to the premature local buckling in the corrosion area and the gradual transformation of the column failure mode from overall buckling to local instability control. With the increase of volume loss rate and corrosion depth, the bearing capacity and ductility of the column decrease significantly, while the symmetrical distribution of circumferential corrosion can to some extent alleviate the stress concentration effect. In addition, increasing the strength of steel and concrete can effectively improve the overall stability of the component, delay the development of buckling and improve the later deformation capacity.

KEYWORDS

Concrete-filled steel tube (CFST), Local pitting corrosion, Finite element analysis, Axial compressive bearing capacity, Failure mode, Volume loss rate

CITE THIS PAPER

Raoya Shi. Numerical Simulation Study on Axial Compression Performance of Concrete-Filled Circular Steel Tubular Columns with Local Pitting Corrosion Loss. Journal of Civil Engineering and Urban Planning (2026). Vol. 8, No.1, 62-71. DOI: http://dx.doi.org/10.23977/jceup.2026.080107.

REFERENCES

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