Lateral buckling of beams - The Behaviour and Design of Steel Structures to EC3 - page 291

6.16.3 Example 10 - checking a braced beam
Determinethemaximummomentatelasticbucklingofthebraced533 × 210UB
92 of S275 steel shown in Figure 6.34b.
6.16.4 Example 11 - checking a monosymmetric beam
Asimplysupported6.0mlong530 × 210UB92beamofS275steelhasequaland
oppositeendmoments.Themomentresistanceistobeincreasedbyweldingafull
length 25 × 16mm plate of S275 steel to one flange. Determine the increases in
the moment resistances of the beam when the plate is welded to
(a) the compression flange, or
(b) the tension flange.
6.16.5Example 12 - checking a non-uniform beam
A simply supported 530 × 210 UB 92 beam of S275 steel has a concentrated
shear centre load at the centre of the 10.0m span.The moment resistance is to be
increased by welding 250 × 16 plates of S275 steel to the top and bottom flanges
overacentrallengthof4.0m.Determinetheincreaseinthemomentresistanceof
the beam.
References
1. Vacharajittiphan P., Woolcock, S.T., and Trahair, N.S (1974) Effect of in-plane
deformation on lateral buckling, Journal of Structural Mechanics, 3 , pp. 29-60.
2. Nethercot, D.A. and Rockey, K.C. (1971) A unified approach to the elastic lateral
buckling of beams, The Structural Engineer, 49 , pp. 321-30.
3. Timoshenko, S.P. and Gere, J.M. (1961) Theory of Elastic Stability, 2nd edition,
McGraw-Hill, NewYork.
4. Bleich, F. (1952) Buckling Strength of Metal Structures, McGraw-Hill, NewYork.
5. Structural Stability Research Council (1998) Guide to Design Criteria for Metal
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