Third Millennium Bridge

Zaragoza, Spain
41.665680, -0.908427

The Third Millennium Bridge is the largest concrete bowstring arch built to date. It was constructed to close a ring road in the city of Zaragoza before the celebration of the BIE International Exposition of 2008. Thanks to its urban function and location in the city, on the one hand, and to the quality of its aesthetic and structural design, on the other, it has become an icon of the city and a worldwide engineering feat (it received a fib Award in 2010 and the Gustave Magnel medal among other recognitions). High strength, self-compacting white concrete was used in almost the entire bridge (C60/75 in the deck and C75/90 in the arch) to take slenderness to the limit. Complex erection procedures were needed for its construction, including the launching of a 34 m wide and up to 200,000 kN in weight deck, and the introduction of a 120,000 kN horizontal load in the crown of the arch using hydraulic jacks to put its final forces into play.

role of hbp Involved in the detailed design | Leader of the Unit of Supervision of Construction Works on Site
  • owner Zaragoza Alta Velocidad
  • construction 2005 - 2008
  • contractor Dragados
  • Main span 216.0 m
  • Width 43.0 m
  • Maximum arch height 36.0 m
  • side elevation sketch
    ↑ side elevation sketch
    arerial view of the bridge
    ↑ arerial view of the bridge
    view of the bridge from the deck
    ↑ view of the bridge from the deck
    structural behaviour
    ↑ structural behaviour
    wind tunnel tests (wind analysis: Oritia & Boreas)
    ↑ wind tunnel tests (wind analysis: Oritia & Boreas)
    construction sequence
    ↑ construction sequence
    launching of the deck over temporary piers
    ↑ launching of the deck over temporary piers
    hydraulic jacks at the crown of the arch for putting the forces into play
    ↑ hydraulic jacks at the crown of the arch for putting the forces into play
    prestressing external tendons
    ↑ prestressing external tendons

    At Arenas & Asociados

    At Arup

    At Temha

    At Universidade da Coruña