Vol. 22, No. 4, pp. 407-417 (2026)
ECCENTRIC COMPRESSION MECHANICAL PROPERTIES OF
CONCRETE-FILLED SQUARE STEEL TUBE UNDER CORROSIVE PITTING
Wen-Yu Hou 1, 2, *, Di Wang 1 and Ni Zhang 3
1 School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang 110168, China
2 Shenyang Key Laboratory of low-carbon Transportation Construction
3 School of Civil Engineering, Liaoning Technical University, 125105, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 15 June 2025; Revised: 9 January 2026; Accepted: 12 January 2026
DOI:10.18057/IJASC.2026.22.4.5
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ABSTRACT
This paper studies the eccentric compression of short concrete-filled square steel tube column under corrosive pitting. The random pitting is implemented in Python and the short concrete-filled square steel tube column is simulated by the finite element software ABAQUS. The results show that pitting will affect the ultimate bearing capacity of the specimen. The ultimate load of specimens with regular pitting is higher than that of specimens with random pitting. The pitting will reduce the strength of the steel tube, leading to the decrease of the longitudinal stress of the steel tube. Pitting will cause the early contact between steel tube and concrete, reducing the interaction between steel tube and concrete, and causing the reduction of the bearing capacity of the specimen. For every 0.25 increase in eccentricity, the bearing capacity will decrease by approximately 20%. As the strength of the concrete increases, the bearing capacity of the regular pitting specimens is much higher than that of the random pitting specimens, approximately by about 5%. For every 1mm increase in the thickness of the steel tube, the bearing capacity can be enhanced by approximately 8%. Increasing the strength of concrete, the strength of steel tube, and the thickness of steel tube, the bearing capacity of the regular pitting specimens is generally higher than that of the random pitting specimens.
KEYWORDS
Corrosive pitting, CFST, Random pitting, Regular pitting, Finite element analysis
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