Vol. 21, No. 5, pp. 413-424 (2025)
STUDY ON THE AXIAL COMPRESSION PERFORMANCE OF
CONCRETE FILLED CIRCULAR ALUMINUM ALLOY TUBULAR COLUMN WITH
BUILT-IN HOLLOW STEEL TUBE
Zheng-Tao Zhang, Bing Li and Zhou Bo *
School of Civil Engineering, Shenyang Jianzhu University, 25 Hunnan Rd., Liaoning, Shenyang, 110168, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 16 June 2024; Revised: 8 January 2025; Accepted: 6 February 2025
DOI:10.18057/IJASC.2025.21.5.4
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ABSTRACT
In this paper, longitudinal compression tests were conducted on 8 concrete filled aluminum alloy tubular (CFAT) columns with built-in hollow steel tube, and their failure modes, load-strain curve, transverse deformation coefficient, load-displacement curve, axial compressive stiffness and strength coefficient were analyzed. The results show that each component of the specimens have a good deformation coordination. The type of concrete has a notable impact on the bearing capacity and stiffness of member, when the hollow ratio is 0.72, 0.61, and 0.39, the bearing capacity of specimens with ordinary concrete as the sandwich concrete is 43.4%, 37.0%, 39.7% larger than specimens with lightweight concrete as the sandwich concrete, and the axial compression stiffness is 4.8%, 11.3%, and 25% greater than them. The strength coefficients SI of 8 specimens were greater than 1, which indicate a good composite effect between the components. A full-scale finite element model was set up through using ABAQUS software, through numerical simulation, it is found that the load will be mainly borne by the sandwich concrete and aluminum alloy tube, in addition, the analysis of contact stress indicates that there is minimal interaction between the sandwich concrete and the steel tube. To quantify the effects of factors such as the nominal aluminum ratio, compressive strength of the concrete cubes, hollow ratio, and yield strength of the internal tube on axial compressive performance indicators, parametric analyses were conducted. The method suggested for assessing bearing capacity demonstrates good applicability to CFAT column with built-in hollow steel tube.
KEYWORDS
Concrete filled aluminum alloy tubular (CFAT) column, Built-in hollow steel tube, Axial compression performance, Composite effect, Analysis of the whole stressing process, Parametric analysis
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