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US 20 Arch over the Mississippi River

US 20 Arch over the Mississippi River
Auteur(s):
Présenté pendant 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008, publié dans , pp. 540-541
DOI: 10.2749/222137908796293794
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Very few long span tied arch bridges have been built recently in the U.S. due to concerns regarding redundancy of the structural system and the fact that cable-stayed systems are typically more eco...
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Détails bibliographiques

Auteur(s):
Médium: papier de conférence
Langue(s): anglais
Conférence: 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008
Publié dans:
Page(s): 540-541 Nombre total de pages (du PDF): 8
Page(s): 540-541
Nombre total de pages (du PDF): 8
Année: 2008
DOI: 10.2749/222137908796293794
Abstrait:

Very few long span tied arch bridges have been built recently in the U.S. due to concerns regarding redundancy of the structural system and the fact that cable-stayed systems are typically more economical. However, tied arch systems can be developed that ensure sufficient redundancy and improve cost competitiveness. One such example is the new US 20 bridge. The new bridge is over 1700 meters long with a 258 meter main span. It will carry eastbound US 20 over the Mississippi River between Dubuque, Iowa and East Dubuque, Illinois. The existing two lane bridge will remain in place to carry westbound traffic. This paper will focus on the new materials and technologies that were implemented to meet the redundancy, durability and constructability requirements of the project.