### Journals Information

Civil Engineering and Architecture Vol. 12(2), pp. 1000 - 1013
DOI: 10.13189/cea.2024.120224
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## Axial Compression Load Capacity of Tubular Steel Columns with Polygon Cross-Sections

Amjad A. Yasin *, Ahmad B. Malkawi , Muhmmad I. M. Rjoub , Hani Qadan , Faroq Maraqa , Jamal Aladwan
Department of Civil Engineering, Faculty of Engineering Technology, Al-Balqa Applied University, Jordan

ABSTRACT

Steel columns are structural compression members used in various civil engineering fields. One of the basic design criteria for these members is determining their buckling load. This study investigates the axial compression load capacity of tubular steel columns with hollow thin-walled polygon cross-sections, considering the effects of local buckling and nonlinear variation. Parameters such as the number of sides, side length, wall thickness, length, and steel yield strength were studied. Equations to calculate the axial load capacity of these columns were proposed, both derived and empirical. Results showed that generally, the axial load capacity increases as the number of sides, side lengths, and wall thickness increases. Within the investigated variables range, the variations of the geometric efficiency index were significant when increasing the number of sides up to 12, after which the variations were insignificant, and the number of sides had minimal effect on the slenderness ratio after increasing the number of sides beyond 14. Compared to the buckling resistance determined using AISC-LRFD code equations, the proposed equations can provide good predictions and offer a simple formulation for predicting the axial load capacity of columns with high slenderness ratios while taking into account local buckling and nonlinear effects.

KEYWORDS
Columns, Polygon, Tube, Buckling, Load Capacity

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Amjad A. Yasin , Ahmad B. Malkawi , Muhmmad I. M. Rjoub , Hani Qadan , Faroq Maraqa , Jamal Aladwan , "Axial Compression Load Capacity of Tubular Steel Columns with Polygon Cross-Sections," Civil Engineering and Architecture, Vol. 12, No. 2, pp. 1000 - 1013, 2024. DOI: 10.13189/cea.2024.120224.

(b). APA Format:
Amjad A. Yasin , Ahmad B. Malkawi , Muhmmad I. M. Rjoub , Hani Qadan , Faroq Maraqa , Jamal Aladwan (2024). Axial Compression Load Capacity of Tubular Steel Columns with Polygon Cross-Sections. Civil Engineering and Architecture, 12(2), 1000 - 1013. DOI: 10.13189/cea.2024.120224.