LOW PROFILE RAILROAD BRIDGE DESIGN

Through-girder bridges have been used for many years as a low profile between the rails and the bottom of the girder. However, to construct today requires a great deal of labour-intensive steel fabrication. While the price of steel has not risen in recent years the cost of fabricating steel bridges has risen significantly. It was decided to try to minimize the fabrication costs while maintaining all design requirements. A unique low-profile steel box girder section was designed which has low fabrication cost and minimizes required maintenance. A 100 foot span was designed with a depth between bottom of girder and top of rails of 5'-4" which meets the stiffness requirement of AREMA (live load deflection limit of L/640). The box girder consists of three-cells with steel bottom and web plates composite with a folded concrete deck. The folded deck forms the trough for the railroad ballast. Expensive diaphragm fabrication is avoided due to the inherent torsional stability of the box section. The proposed bridge was successfully built at a substantial savings over a traditional through-girder bridge. For the covering abstract see ITRD E123761.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0947644512
• Corporate Authors:

  ENGINEERING TECHNICS PRESS

  46 CLUNY GARDENS
  EDINBURGH,   United Kingdom  EH10 6BN
• Authors:
  • JACOBSEN, S K
  • HOLTKAMP, M A
• Publication Date: 2003

Language

• English

Media Info

• Features: References;
• Pagination: 9 p.
• Monograph Title: EMBEDDED SLAB TRACK TEST TRACK IN SPAIN: CONSTRUCTION OF A LOW MAINTENANCE CONCRETE SLAB TRACK
• Serial:
  • PROCEEDINGS OF THE INTERNATIONAL CONFERENCE AND EXHIBITION RAILWAY ENGINEERING 2003, HELD LONDON, UK, 30 APRIL - 1 MAY 2003 - CDROM
  • Publisher: ENGINEERING TECHNICS PRESS

Subject/Index Terms

• TRT Terms: Beams; Box girders; Bridge decks; Concrete; Conferences; Construction; Costs; Design; Metal bridges; Railroad tracks; Steel
• ITRD Terms: 3472: Beam; 3474: Box girder; 3482: Bridge deck; 4755: Concrete; 8525: Conference; 3655: Construction; 224: Cost; 9011: Design (overall design); 3465: Metal bridge; 1062: Railway track; 4542: Steel
• Subject Areas: Construction; Design; Finance; Railroads;

Filing Info

• Accession Number: 00985540
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-947644-51-2
• Files: ITRD
• Created Date: Feb 4 2005 12:00AM