A numerical study on concrete-filled aluminium circular hollow section columns is presented. A nonlinear finite element model was developed in this study. The model was verified against test results. The finite element model was used for a parametric study and investigated the diameter-to-thickness ratio of the aluminium hollow sections and the concrete strength. The aluminium tubes of high strength material using the nominal concrete cylinder strengths of 70 and 100 MPa were investigated. The results obtained from the numerical study were compared with the design strengths calculated from the American and Australian/New Zealand specifications for aluminium and concrete structures. Design equations for concrete-filled aluminium circular hollow section columns are proposed. It is shown that the proposed design equations accurately predicted the column strengths.
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