ABSTRACT
This chapter aims to develop a theoretical model of inelastic flexural-torsional buckling and presents a computer method of analysis. It provides comparisons of the theoretical predictions with the results of inelastic buckling experiments. Residual stresses are induced in welded beams by uneven heating and cooling as a result of flame-cutting and welding the flanges and webs. Residual stresses may increase the resistance to inelastic buckling, as in the case of welded beams where flame-cutting of the flanges induces high residual tensile stresses at the flange tips. The chapter discusses the effects of the support conditions and the loading arrangements on the inelastic buckling of beams and beam-columns. It discusses the data required for computer method, and shows how the cross-section and member analyses are performed, and determines how the yielded and strain-hardened boundaries. Approximate methods have been developed for analysing the inelastic buckling of determinate beams which are prevented from deflecting and twisting at their supports and brace points.
