S.A.M. Ghannadpour, H.R. Ovesy and M. Nassirnia
This paper presents the theoretical developments of two finite strip methods (i.e. semi-analytical and full-analytical) for the post-buckling analysis of some box section struts. The investigation of struts buckling behaviour is then extended to the post-buckling study with the assumption that the deflected form after the buckling is the combination of first, second and higher (if required) modes of buckling. Thus, the full-analytical post-buckling study is effectively a multi term analysis, which is attempted by utilizing the so-called semi-energy method. Through the comparison of the results and the appropriate discussion, the knowledge of the level of capability of these methods is significantly promoted.