The Structural Engineer > Archive > Volume 62 (1984) > Issues > Issue 15 > Design Curves for the Bending Strength of Circular and Octagonal Steel Tubes, Including the Effect o
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Design Curves for the Bending Strength of Circular and Octagonal Steel Tubes, Including the Effect of a Hole

Steel lighting columns are typically constructed from thin-walled circular or octagonal tubes. The bending strength of such tubes is considered, with allowance being made for the presence of an access hole. A method of generating bending strength curves and tables is described. Because of the complexity of the problem, the method is basically empirical, using an adaptation of the Ayrton-Perry equation. The method is fully defined by the small number of simple equations given in Appendix A. The controlling parameters have been assigned values that ensure acceptable agreement with available test results. Typical design data so calculated are presented in both graphical and tabular form. G.H. Little