A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Structural assessment of suspension bridges example of Forth Bridge in the UK
The assessment of the condition of cables in suspension bridges and other cable-supported structures has typically been problematic. The inaccessibility of all but the outer layers of wire has limited the value of visual inspection of the cables, and traditional non-destructive testing techniques, such as radiography and magnetic flux, have severe limitations that render them unsuitable for most applications. Also, over the past ten years, new proprietary monitoring and inspection technologies have been introduced that have provided bridge owners and engineers with better information about the condition and rate of deterioration of these critical structural components. Continuous remote acoustic monitoring of the main cables of a suspension bridge was first implemented in North America on the Bronx Whitestone Bridge in 2000, having previously been used successfully to monitor the condition of post-tensioned structures. Since that time it has been applied on several suspension bridges in the US, France and United Kingdom. In 1999, Southwest Research Institute used its proprietary magnetostrictive sensing ('MsS') technology to assess the condition of suspender ropes on the George Washington Bridge in New York City. Both of these techniques have since been refined and improved to the point where they now provide comprehensive information about the health of bridge cables, and allow informed decisions to be made about repair or replacement. This paper provides an overview of current cable inspection practices. It traces the evolution of the new technologies, presents case studies, and discusses the limitations and challenges associated with each technique. The example of the FORTH suspension bridge will be particularly developed.
Structural assessment of suspension bridges example of Forth Bridge in the UK
The assessment of the condition of cables in suspension bridges and other cable-supported structures has typically been problematic. The inaccessibility of all but the outer layers of wire has limited the value of visual inspection of the cables, and traditional non-destructive testing techniques, such as radiography and magnetic flux, have severe limitations that render them unsuitable for most applications. Also, over the past ten years, new proprietary monitoring and inspection technologies have been introduced that have provided bridge owners and engineers with better information about the condition and rate of deterioration of these critical structural components. Continuous remote acoustic monitoring of the main cables of a suspension bridge was first implemented in North America on the Bronx Whitestone Bridge in 2000, having previously been used successfully to monitor the condition of post-tensioned structures. Since that time it has been applied on several suspension bridges in the US, France and United Kingdom. In 1999, Southwest Research Institute used its proprietary magnetostrictive sensing ('MsS') technology to assess the condition of suspender ropes on the George Washington Bridge in New York City. Both of these techniques have since been refined and improved to the point where they now provide comprehensive information about the health of bridge cables, and allow informed decisions to be made about repair or replacement. This paper provides an overview of current cable inspection practices. It traces the evolution of the new technologies, presents case studies, and discusses the limitations and challenges associated with each technique. The example of the FORTH suspension bridge will be particularly developed.
Structural assessment of suspension bridges example of Forth Bridge in the UK
Strukturelle Bewertung von Hängebrücken am Beispiel der Forth-Brücke in Großbritannien
Wit, M. de (author) / Hovhanessian, G. (author)
2006
9 Seiten, 8 Bilder, 6 Quellen
Conference paper
Storage medium
English
STRUCTURAL ASSESSMENT OF SUSPENSION BRIDGES: EXAMPLE OF FORTH BRIDGE IN THE UK
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