Computational & Technology Resources
an online resource for computational,
engineering & technology publications
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Stability of Tapered Half-Through Girder High Strength Steel Railway Bridges
M.A. Bradford and H.Y. Ban
Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, Australia
M.A. Bradford, H.Y. Ban, "Stability of Tapered Half-Through Girder High Strength Steel Railway Bridges", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 72, 2014. doi:10.4203/ccp.104.72
Keywords: buckling, half-through girder, high-strength steel, residual stresses, tapered beam.
This paper presents a numerical analysis of half-through girder bridges made from high strength steel (HSS). These bridges are attractive because modern fabrication techniques allow for HSS plate girders which are tapered to be welded from flat plates, thereby optimising material usage. HSS has a favourable strength to weight ratio when compared with mild steel, and so less material is needed by comparison. Design rules for tapered HSS beams do not appear in current standards, because the buckling curve for a HSS flexural member needs to incorporate the interaction between elastic buckling and yielding, with attention to the specific residual stresses inherent in the fabrication of HSS girders. Based on the numerical results, design guidance for tapered half-through girders is discussed.
purchase the full-text of this paper (price £20)