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This material is copyright - all rights reserved. Reproduced under licence from The Steel Construction Institute on 12/2/2007 To buy a hardcopy version of this document call 01344 872775 or go to http://shop.steelbiz.org/ Steel Designers' Manual - 6th Edition (2003) 4. UIC (1971) Leaflet 702. UIC, 14 rue Jean-Ray F., 75015 Paris, France. 5. Pugsley A. (1968) The Theory of Suspension Bridges, 2nd edn. Edward Arnold, London. 6. Podolny W. (1976) Construction and Design of Cable-Stayed Bridges. John Wiley & Sons, New York. 7. Pucher A. (1973) Influence Surfaces of Elastic Plates, 4th edn. Springer-Verlag, New York. 8. Hayward A.C.G. (2002) Composite Steel Highway Bridges. Corus Construction Centre, Scunthorpe. A worked example follows which is relevant to Chapter 4. References 165
This material is copyright - all rights reserved. Reproduced under licence from The Steel Construction Institute on 12/2/2007 To buy a hardcopy version of this document call 01344 872775 or go to http://shop.steelbiz.org/ Steel Designers' Manual - 6th Edition (2003) 166 Worked example The Steel Construction Institute Silwood Park, Ascot, Berks SL5 7QN Problem Subject Chapter ref. Design code Made by ACGH Sheet no. A composite highway bridge has 3 continuous spans of 24, 40 and 32 m as shown. Overall deck width is 12 m and it carries 45 units of HB loading. There are 4 plate girders in the cross-section of 1.75 m depth. Estimate the main girder size and the weight of structural steel. W=12 Pu D=J.75 LI I I I Span Pier Pier Span girder girder S girder girder I— i 24 in 40 in 32 m Span A Span B Span C 4 12 Average girder spacing ‘s’ = = 3.0 m 4 Flange and web sizes From Figure 4.20 kaf = 0.85 (top flange span girders) kaf = 0.87 (generally) ktw = 0.95 SPAN A This is an end span so take INITIAL DESIGN OF HIGHWAY BRIDGE BS 5400 L = 1.25 ¥ 24 m = 30 m therefore L/D = 30 m 175 . m = 17 so assume L/D = 20 Checked by GWO 4 1
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