Flexural and Flexural-Torsional Bifurcation of Locally Buckled Beam-Columns

摘要

The report describes the overall bifurcation behavior of locally buckled I-sections in combined compression and major axis bending. The overall bifurcation loads are calculated using the tangent rigidities of the locally buckled cross-section for minor axis flexture and warping torsion. The expression for the overall bifurcation load is analytic while the tangent rigidities are calculated numerically using an elastic nonlinear finite strip local buckling analysis.