doi:10.3850/978-981-08-9247-0_rp084-icsas11

ABSTRACT

In this paper the study on lateral flexural-torsional buckling of steel beams with web holes will be briefly presented. The steel beam SIGMA cross-section under consideration appertains to a group of at least monosymmetric open sections, loaded transversally to their axis of symmetry. The results of theoretical analysis and testing of beam buckling had been evaluated both in terms of the ultimate strength design concept and - more recent - defined limit displacement design concept. In cases without code limitations for deflection or twisting (at torsion members, at lateral beam buckling, at compression members, for example) the ultimate displacements, deformations or ductility characteristics should be checked and verified. Presented results indicate the suitability of the less favourable standard buckling curves for the respective design procedures.

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