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Psotný, Martin
Sborník vědeckých prací Vysoké školy báňské--Technické univerzity Ostrava. Řada stavební, 12/2012, Volume: 12, Issue: 2Journal Article
Postbuckling analysis of slender web loaded in compression is presented. The non-linear FEM equations 14 are derived from the variational principle of minimum of total potential energy 13. To obtain the non-linear equilibrium paths, Newton-Raphson iteration algorithm 11, 12 is used. Peculiarities of the effect of the initial imperfections 7, 8 on load-deflection paths are investigated with respect to aspect ratio of the web. Special attention is focused on the postbuckling mode of the web. V príspevku je analyzované pokritické pôsobenie tlačenej štíhlej steny. Systém nelineárnych podmienkových rovníc v metóde konečných prvkov 14 bol odvodený z variačného princípu minima celkovej potenciálnej energie 13. Za účelom získania zaťažovacích dráh bola použitá Newton- Raphsonova iteračná metóda 11, 12. Vplyv počiatočných tvarových imperfekcií 7, 8 na jednotlivé zaťažovacie dráhy pokritického pôsobenia bol skúmaný s ohľadom na pomer strán štíhlej steny.
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