Abstract
In several design codes and specifications, simplified formulae, diagrams or charts are given for determining the effective lengths of frame columns. It is possible to show that these simplified approaches may yield rather erroneous results in certain cases. This is due to the fact that, the code formulae utilise only local stiffness distributions, thus ignoring the general behaviour of the system. In this paper, a simplified procedure for determining approximate values for the buckling loads of multi-storey frames is developed. The procedure utilises lateral load analysis of frames and yields errors less than 10%, which may be considered suitable for practical purposes. The proposed procedure is applied to several numerical examples and it is shown that all the errors are in the acceptable range and on the safe side.
| Translated title of the contribution | Effective lengths of columns in unbraced multi-storey frames |
|---|---|
| Original language | Turkish |
| Pages (from-to) | 3695-3711 |
| Number of pages | 17 |
| Journal | Teknik Dergi/Technical Journal of Turkish Chamber of Civil Engineers |
| Volume | 16 |
| Issue number | 4 |
| Publication status | Published - Oct 2005 |