Prestressing Schemes for Incrementally Launched Bridges
Publication: Journal of Bridge Engineering
Volume 4, Issue 2
Abstract
Incremental launching is a competitive construction method for medium-span prestressed concrete bridges. Compared with other techniques for in situ casting, in short bridges it is an alternative to the use of falseworks and reduces the cost of labor with the same investment. In longer bridges it is an alternative to movable shuttering systems and reduces both investment and labor cost. Compared with segmental precasting, it may reduce both investment and the cost of prestressing, which may be partial instead of total, with the same advantages in terms of industrial production. Due to its competitiveness and overall quality, this construction method is widely used in Europe. During launch, the superstructure is moved over fixed bearings. The superstructure dead load produces temporary flexural and shear stresses within the cross section that are quite different from those produced by the service loads and, consequently, require special prestressing schemes, thoroughly illustrated in this paper.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Breen, J., and Naaman, A. ( 1990). “External prestressing in bridges.” ACI SP 120, American Concrete Institute, Detroit.
2.
Rosignoli, M. ( 1997). “Influences of the incremental launching construction method on the sizing of prestressed concrete bridge decks.” Proc. Instn. Civ. Engrs. Struct. and Build., London, 122(3), 316–325.
3.
Rosignoli, M. ( 1998). Launched bridges . ASCE, Reston, Va.
Information & Authors
Information
Published In
History
Received: May 18, 1998
Published online: May 1, 1999
Published in print: May 1999
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.