"The analysis of two L-frames made up by channel sections subjected to various constraint. conditions has been performed in order to determine their buckling and postbuckling. behaviour. The analysis has been carried out in the framework of the asymptotic. bifurcation theory, using a one-dimensional nonlinear elastic beam model able. to account for warping. For each case considered, the first two buckling loads have. been determined, together with the associated eigenmodes. For the frames showing. an asymmetric postbuckling behaviour only the initial slope of the bifurcated path has. been determined. In case of symmetric behaviour, also the secondary modes and the. initial curvatures of the bifurcated path have been evaluated. The effects of small initial. imperfections have also been studied in order to estimate the real load carrying. capacity of the frames for all the cases examined"
Gabriele, S., Rizzi, N.L., Varano, V. (2012). On the Imperfection Sensitivity of Thin-Walled Frames. In Proceedings of the Eleventh International Conference on Computational Structures Technology. STIRLINGSHIRE : Civil-Comp Press [10.4203/ccp.99.15].
On the Imperfection Sensitivity of Thin-Walled Frames
GABRIELE, STEFANO;RIZZI, Nicola Luigi;Varano V.
2012-01-01
Abstract
"The analysis of two L-frames made up by channel sections subjected to various constraint. conditions has been performed in order to determine their buckling and postbuckling. behaviour. The analysis has been carried out in the framework of the asymptotic. bifurcation theory, using a one-dimensional nonlinear elastic beam model able. to account for warping. For each case considered, the first two buckling loads have. been determined, together with the associated eigenmodes. For the frames showing. an asymmetric postbuckling behaviour only the initial slope of the bifurcated path has. been determined. In case of symmetric behaviour, also the secondary modes and the. initial curvatures of the bifurcated path have been evaluated. The effects of small initial. imperfections have also been studied in order to estimate the real load carrying. capacity of the frames for all the cases examined"I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
