Elastic Torsional Buckling of Through Plate Girder Rail Bridges
C Duffield, G Hutchinson, LK Stevens, G Fletcher (ed.), B Brown (ed.), C Clifton (ed.), J Little (ed.), J Marriott (ed.), C McIIroy (ed.)
Proceedings of the Pacific Structural Steel Conference | New Zealand Heavy Engineering Research Association | Published : 1986
An investigation has been conducted to study the lateral torsional buckling characteristics of a through plate girder railway bridge at Mitchell River in Victoria. Field measurements of lateral imperfections were taken on a selection of typical bridges. Elastic and non-linear finite element analyses of the bridge model incorporating the field measured imperfections indicated that one critical buckling live load was 6. 5 times the design live load. Possible problems are examined in relation to the vertical stiffeners as a result of this sensitivity to lateral imperfections.