A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Strengthening of a Three-Span Continuous Bridge by Post-Tensioning
Abstract The need to upgrade a large number of understrength and obsolete bridges in the United States has been well documented in the literature. Through several Iowa DOT projects, the concept of strengthening simple-span bridges by post-tensioning has been developed. The purpose of the project described in this paper was to investigate the use of post-tensioning for strengthening continuous composite bridges. In a previous, successfully completed investigation, the feasibility of strengthening a continuous, composite bridge by post-tensioning was demonstrated on a laboratory 1/3-scale-model three-span bridge. The project reviewed in this paper can thus be considered the field testing phase. With finite element analysis, a post-tensioning system was developed that required post-tensioning of the positive moment regions of both the interior and exterior beams. During the summer of 1988, the strengthening system was installed along with instrumentation to determine the bridge’s response and behavior. In 1989, approximately one year after the initial strengthening, the bridge was retested to identify any changes in its behavior. Although considerably more involved than the post-tension strengthening of single-span bridges, post-tensioning of continuous-span bridges is a feasible, practical strengthening technique.
Strengthening of a Three-Span Continuous Bridge by Post-Tensioning
Abstract The need to upgrade a large number of understrength and obsolete bridges in the United States has been well documented in the literature. Through several Iowa DOT projects, the concept of strengthening simple-span bridges by post-tensioning has been developed. The purpose of the project described in this paper was to investigate the use of post-tensioning for strengthening continuous composite bridges. In a previous, successfully completed investigation, the feasibility of strengthening a continuous, composite bridge by post-tensioning was demonstrated on a laboratory 1/3-scale-model three-span bridge. The project reviewed in this paper can thus be considered the field testing phase. With finite element analysis, a post-tensioning system was developed that required post-tensioning of the positive moment regions of both the interior and exterior beams. During the summer of 1988, the strengthening system was installed along with instrumentation to determine the bridge’s response and behavior. In 1989, approximately one year after the initial strengthening, the bridge was retested to identify any changes in its behavior. Although considerably more involved than the post-tension strengthening of single-span bridges, post-tensioning of continuous-span bridges is a feasible, practical strengthening technique.
Strengthening of a Three-Span Continuous Bridge by Post-Tensioning
Klaiber, F. W. (author) / Dunker, K. F. (author) / Planck, S. M. (author)
1990-01-01
14 pages
Article/Chapter (Book)
Electronic Resource
English
Strengthening of a Three-Span Continuous Bridge by Post-Tensioning
| British Library Conference Proceedings | 1993
Bridge rehabilitation and strengthening by continuous post-tensioning
| Engineering Index Backfile | 1969
Strengthening of Existing Bridges (Simple and Continuous Span) by Post-Tensioning
| British Library Conference Proceedings | 1990
Post-tensioning a Steel Bridge: Strengthening of the Burlington Skyway
| British Library Conference Proceedings | 1990