Abstract
This paper presents a practical method for the stability analysis of semi-braced steel frames with the effect of semi-rigid behaviour of beam-to-column connections being taken into account. The stability of a single column under different lateral restraining conditions is discussed first. Following the concept of story-based buckling, the stability equation for frames is then established. Lateral-bracing factors are introduced to characterize the effect of lateral bracing on the elastic stability of columns and frames. The procedure of evaluating column effective length factors for semi-braced steel frames is presented along with illustrated examples.
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