ABSTRACT
The effect of local buckling on global behaviour at the ultimate limit state is such that the yield stress cannot develop in all of the fibres of the cross-section. A consequence of this is that the limiting elastic moment of resistance cannot develop. The reduction in strength is due to premature buckling of the slender elements of the cross-section which are in
(c) Flexural buckling
N
N
(g) Web buckling/bearing
(b) Distorsional buckling − translation and rotation
at the nodes
(e) Torsional buckling
N
N
(d) Lateral-torsional buckling
W
(a) Local buckling − rotation only at the nodes
Before After
(h) Shear buckling
(f) Torsional-flexural buckling
N
N
a redistribution of the stresses to the stiffer edges as shown in Figure 6.3.
