) A stressed ribbon pedestrian bridge near Essing using a fabricated deck | |
| Ancestor | Simple suspension bridge |
|---|---|
| Related | Suspension bridge |
| Descendant | None |
| Carries | Pedestrians, automobiles, trucks |
| Span range | Medium |
| Material | Steel rope, concrete or treated woods |
| Movable | No |
| Design effort | Medium |
| Falsework required | No |
A stressed ribbon bridge (also stress-ribbon bridge or catenary bridge[1]) is a tension structure (similar in many ways to a simple suspension bridge). The suspension cables are embedded in the deck which follows a catenary arc between supports. Unlike the simple span, the ribbon is stressed in traction, which adds to the stiffness of the structure (simple suspension spans tend to sway and bounce). The supports in turn support upward thrusting arcs that allow the grade to be changed between spans (where multiple spans are used). Such bridges are typically made from concrete reinforced by steel tensioning cables. Where such bridges carry vehicle traffic a certain degree of stiffness is required to prevent excessive flexure of the structure, obtained by stressing the concrete in compression.
Examples
)
- Lake Hodges Pedestrian Bridge - the longest stressed ribbon bridge in the world, measuring 303m (995ft).
- Leonel Viera Bridge - the first stressed ribbon bridge ever built. Designed and built by engineer Lionel Viera. Completed in 1965.[2]
- Phyllis J. Tilley Memorial Bridge - a hybrid concrete arch/stressed ribbon bridge across the Trinity River in Fort Worth, Texas.
- Rogue River Pedestrian Bridge - a pedestrian-pipeline bridge across the Rogue River at Grants Pass, Oregon.[3]
- Terwillegar Park Footbridge - a stressed ribbon bridge across the North Saskatchewan River in Edmonton, Alberta that is the second longest in the world, measuring 262m (859ft).
Notes
- ^ Leonardo Fernández Troyano, Bridge Engineering: A global perspective, Thomas Telford, 2003, ISBN 0-7277-3215-3, p. 514.
- ^ Puente de la Barra de Maldonado at Structurae. Retrieved 2009-12-07. 34°54′39″S 54°52′22″W / 34.910904°S 54.872745°W
- ^ Rogue River Pedestrian Bridge at Structurae. Retrieved 2009-12-07.42°25′38″N 123°20′47″W / 42.427115°N 123.346306°W
References
- Strasky, Jiri (2006). "Stress Ribbon and Cable Supported Pedestrian Bridges" (PDF). Retrieved 2012-10-28.
- Strasky, Jiri (2005). Stress Ribbon and Cable Supported Pedestrian Bridges. London: Thomas Telford. ISBN 978-0-7277-3282-8.