The Structural Engineer > Archive > Volume 38 (1960) > Issues > Issue 7 > Deflections of Plane Frames at the Point of Collapse
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Deflections of Plane Frames at the Point of Collapse

The flexibility which is inherent in nominally rigid joints and footings in plane frames is known not to affect the value of the plastic collapse load. The object of the present paper is to show that substantial amounts of flexibility can often occur without affecting the deflections at the point of collapse, that is when the plastic collapse load has just been attained but no motion of the collapse mechanism has taken place. This is in striking contrast to the obvious increase in the deflections in the elastic range of behaviour when flexibility of any kind is present. Professor G. Neal

Author(s): Neal, B G

Keywords: plane frames;failures;deflection;stiffness;connections;portal frames;worked examples