Modified approach for consideration of stability in design of columns in plane steel frames II:Case studies(1)

In order to overcome the limitations of the current design code,such as the analysis methods of the internal forces and the effective length method used in stability of steel columns,one modified elastic methods based on design code method for analysis and check for limit state strengths of steel frames are outlined. In this paper,the results from a comprehensive set of portal frames and threestorey frames are summarized to establish the accuracy and validity of these two approaches for evaluation of the maximum strength of steel framing columns.Comparisons are made to results from rigorous distributed plasticity of analyses.