The Structural Engineer > Archive > Volume 69 (1991) > Issues > Issue 12 > The Stability of Multibay Portal Frames
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The Stability of Multibay Portal Frames

This paper considers the inplane stability of regular and irregular multibay portal frames. The methodology is directed towards estimates of the elastic critical load which give an indication of the significance of inplane instability whether the frame is designed on an elastic or plastic basis. Simple expressions for the practical estimation of the elastic critical load are given for a range of situations, including both the external and internal bays of multibay frames, portal frames supported on valley beams or props, and tied portals. In each case, the proposed expression is justified by comparison with exact analysis for a range of practical cases. Professor J.M. Davies

Author(s): Davies, J M

Keywords: portal frames;stability;multibay;analysis;mathematical models;supported;steel;deflection