Abstract
This paper presents and discusses the results of parametric analyses on the relationship between the axial force and the deformation capacity of concrete-filled square steel tube (square CFT) columns using the developed nonlinear fiber element method. The accuracy of the computational technique is verified by comparing the results from this technique with experimental results carried out by Matsuiet al., 1998. The developed computational technique is used to investigate the cumulative limit axial load for square CFT column by parametric studies and compare with the limit axial load developed by Matsuiet al., 1998 on the basis of experimental data. Formula suitable for the calculation of the cumulative limit axial load of square CFT columns is presented.
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