Bifurcation of Locally Buckled Channel Columns

摘要

The report derives the government equations for the fundamental and bifurcatedstates of members with singly symmetric cross-sections that locally buckle in the fundamental state. The members are subject to pure compression and assumed to be geometrically perfect in the overall sense. The method of analysis uses elastic and inelastic geometric nonlinear finite strip buckling analyses to determine the tangent rigidities of the locally buckled section. These rigidities are substituted into the equations for overall flexural and flexural-torsional buckling to obtain the bifurcation loads.