Moving At the Speed of Steel

In this article the author describes the construction of two high-speed railway (HSR) bridges in Spain. Both the Sant Boi and Llinars bridges are notable for their use of steel materials and slender aesthetics. While most of the HSR bridges in Spain are cast-in-place concrete structures, these new bridges are comprised of steel and composite steel and concrete. Several factors had to be kept in mind regarding the design of the bridges. Railway bridges differ from roadway bridges in that the internal forces are 2 to 2.5 times greater and there are larger horizontal loads generated from the rail traffic. Traffic safety and passenger comfort required limiting the maximum peak vertical acceleration on the deck, determining deck torsion and deformations, determining maximum vertical deflection, and verifying the track and limiting rail stress. The author describes in detail the various technical characteristics of the bridges, including adherence to standards stipulated by Spanish code and the European Commission’s Eurocode, as well as color selection to enhance appearance of the structures. Finally, the use of a composite deck suspended from curved steel members allowed for an incrementally launched erection method, minimal interference with the infrastructure operating beneath the bridges, and ultimately, a sleek design.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01095843
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: Apr 24 2008 1:15PM