ASSESSMENT OF FORSMO BRIDGE, SWEDEN

The Forsmo bridge is a 263m-long riveted steel truss arch railway bridge built in 1912. A 3-dimensional model of the structure was built in LUSAS Bridge in order to assess its potential to cope with freight trains with a 25t axle load. Groups of strain gauges were installed in carefully selected locations on the actual bridge to obtain information concerning the behaviour of the structure under in-service conditions. This information was used to refine the LUSAS model. The interaction between global and local effects was substantial, with stresses in some members changing by more than 100% from their initial values. An upgrade for the upper superstructure for 25t axle loads was considered but this gave a formal fatigue lifetime of only 10-30 years. Consequently total replacement of the upper superstructure is planned, to take 30t axle loads with a lifetime of 100 years.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14665123
• Corporate Authors:

  Institution of Structural Engineers

  11 Upper Belgrave Street
  London,   United Kingdom  SW1X 8BH
• Authors:
  • PEDERSEN, C
• Publication Date: 2002-7-2

Language

• English

Media Info

• Pagination: p. 16
• Serial:
  • Structural Engineer
  • Volume: 80
  • Issue Number: 13
  • Publisher: Institution of Structural Engineers
  • ISSN: 1466-5123

Subject/Index Terms

• TRT Terms: Arch bridges; Axle load force; Bridge bearings; Finite element method; Freight trains; Improvements; Life span; Material reinforcement; Metal bridges; Stresses
• Uncontrolled Terms: Lifetime; Stress (Applied load)
• ITRD Terms: 3427: Arch bridge; 3067: Axle load; 3415: Bearing (bridge); 6490: Finite element method; 1277: Freight train; 9108: Improvement; 5950: Life cycle; 5567: Load; 3465: Metal bridge; 9111: Reinforcement (gen)
• Subject Areas: Freight Transportation; Railroads; Society;

Filing Info

• Accession Number: 00928870
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Aug 2 2002 12:00AM