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The paper investigates the general buckling of an axially loaded column using the finite element method with different slenderness ratios of axes x-x and z-z. The paper deals with three different modes of buckling. The conducted numerical experiments have suggested correction factors and appropriate buckling modes of the built-up columns. The obtained modelling results were compared with data on analytical calculations made according to Lithuanian national codes STR and Eurocode 3. The FEM analysis of the builtup column has showed that both codes (STR and EC3) are giving safe enough results for a considered type of conditions for column support.

engineering structures and technologies

GENERAL BUCKLING ANALYSIS OF STEEL BUILT-UP COLUMNS USING FINITE ELEMENT MODELLING / PLIENINIŲ SPRAGOTŲJŲ KOLONŲ BENDROJO PASTOVUMO SKAIČIAVIMAS, MODELIUOJANT UŽDAVINĮ BAIGTINIAIS ELEMENTAIS