Estimation of dynamic buckling for composite columns with open cross-section

Local, global and interactive dynamic responses of thin-walled columns with open cross-sections subjected to pulse compressive loading of different shape are discussed. An analytical-numerical method has been proposed to analyse the dynamic buckling problem. The applied method is based on the asymptotic Koiter's theory for conservative systems in the second-order approximation. In order to obtain equations of column walls, the non-linear theory of orthotropic thin-walled plates has been modified in such a way that additionally it accounts for all components of inertia forces. The results of calculations obtained with the analytical-numerical method have been compared with those attained from the finite element method. The results are in good agreement.

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