Axial compression behaviors of steel shear-keyed tubular columns: Numerical and analytical studies

Kashan Khan*, Zhihua Chen, Jiadi Liu, Konstantinos Daniel Tsavdaridis, Keerthan Poologanathan

*Corresponding author for this work

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2 Citations (Scopus)


This study developed a finite element model (FEM) and reported parametric and analytical studies on the axial compression behaviors of shear-keyed tubular columns in modular steel structures (MSS). The accuracy of the developed FEM was validated using 36 tests in references. The parametric study designed 108 FEMs to investigate initial imperfection, shear-key height (Lt), thickness (tt), steel tube length (D), width (B), thickness (tc), and height (Lc) influence. The typical load-shortening response showed elastic, inelastic, and recession stages, with failure modes of inward and outward sinusoidal pairs of local buckling. Increasing tt, Lt, tc, D, or B improved strength and stiffness, while Lc or slenderness (Lc/r) adversely affected the stiffness and ductility linearly. Besides, it ensured by validations that prediction equations in conventional design standards overestimated the compressive resistance, requiring modifications.

Original languageEnglish
Article number107894
JournalJournal of Constructional Steel Research
Early online date17 Mar 2023
Publication statusPublished - 1 Jun 2023

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