Bearing the Trains: Measuring Movements on Lisbon Link

One of the most high people and challenging construction projects of the 1990s was the addition of a new deck to carry rail traffic across the 25 de Abril Bridge in the Portuguese capital of Lisbon. Additional cables were spun on the suspension bridge to support a new lower deck across which 140 trains a day run between Lisbon and Almada over the Tojo River. Because of the weight and velocity, the trains have introduced high vertical displacements into the bridge deck which cause corresponding displacements and rotations at the ends of the bridge. This article examines the new system that has been incorporated into the bridge in order to monitor strains on the bearings caused by the addition of trains to the bridge.


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  • Accession Number: 01002666
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 25 2005 5:39PM