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Inuence of Inherent Material Damping on the Dynamic Buckling of Composite Columns with Open Cross-Sections

Kołakowski Z., Teter A.

Mechanics and Mechanical Engineering

2013

Vol. 17, nr 1

59--69

In this paper the analysis of the damping behaviour of thin–walled composite columns with open stiffened cross–sections subjected to in–plane pulse loading is described. The pulse loading of a rectangular shape is concerned. The discussed problem of the dynamic interactive buckling is solved by the analytical–numerical method (ANM) using the Koiter’s perturbations method. A critical value of the dynamic load factors is determined according to the Budiansky–Hutchinson’s criterion for different value of the viscous damping ratio. The detailed calculations confirm that small damping does not affect the dynamic buckling of the thin–walled composite columns under the impact in–plane loading.

The effect of nonlinear restraint on torsional buckling and post-buckling behaviour of a thin-walled column

Szymczak C.

Foundations of Civil and Environmental Engineering

2006

No. 7

333-342

Torsional buckling and post-buckling of a simply supported axially compressed thin-walled column of open bisymmetric cross-section with a central restrain has been investigated. The nonlinear behaviour of the restraint against the rotation angle of the cross-section has been assumed. The stability consideration is based upon the classical theory of beams with nondeformable cross-section. The solution of the buckling and post-buckling behaviour problem formulated has been found with the perturbation approach. The critical load and the initial post-buckling path of equilibrium for I - column for the cubic relation of the restraint reaction and the rotation angle have been determined. The results show the considerable effect of nonlinearity of the restraint behaviour on the post-buckling path of equilibrium of the column in comparison with the linear restraint.