CREEP EFFECTS DURING LAUNCH OF THE SERIO RIVER BRIDGE

This article discusses the building of the Serio River Bridge located near Bergamo, in northern Italy. During the launch of the bridge, 21 months of work stoppage produced large creep deformations in the superstructure. The deformations did not cause an impediment to the completion of launch, but several adjustments were necessary. The adjustments were limited to temporary devices (launching nose, launching bearings, external tendons) and no intervention was necessary on the structure itself. Upon completion of the launch, the deck segments built before stoppage were affected by permanent deformations similar to those that the segments would assume if cast-in-place and fully prestressed, but opposite in sign. Secondary effects were avoided by adjusting the level of the permanent bearings at the abutment and at the first 2 piers. Even under these unusual circumstances, incremental launching proved to be a reliable method of construction.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 53-58
  • Serial:
    • Concrete International
    • Volume: 22
    • Issue Number: 3
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 00791456
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 28 2000 12:00AM