Abstract
In the paper, the basic column strength curves are investigated analytically by the finite element technique. At first, the imperfection sensitivity function for column strength is introduced and the various coefficient in the function are numerically identified by a finite displacement elasto-plastic analysis with both geometrical and material imperfections. And using a number of imperfection sets generated by Monte Carlo simulation from the measured imperfection data, the strength distributions of steel columns with several representative cross-sections are evaluated from a probabilistic views. The theoretical results are compared with the experimental buckling strength database. Finally, the mean strength curves and the resistance factors for two column groups are proposed.
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