General Information
Figure 1 shows a cable-stayed bridge that is used by motorcycles, bicycles and pedestrians.
![Cable-stayed bridge over a river](bridges/cable-stayed-bridges/bridge-2/1-cable-stayed-bridge.jpg)
Type | Single-span cable-stayed bridge |
Main span | ≅ 120 m |
Deck width | ≅ 2 m |
Girder | Steel twin I-girder |
Pylon | Reinforced concrete (A-longitudinal shaped) |
Stay cable arrangement | Radial (two cable planes) |
Main Span Vertical Alignment
Figure 2 shows a side view of the main span.
![Main span vertical alignment of a cable-stayed bridge](bridges/cable-stayed-bridges/bridge-2/2-main-span.jpg)
The main span vertical alignment consists of one horizontal and two inclined sectors. Figure 3 shows a schematic lateral view of half bridge.
![Schematic lateral view of a cable-stayed bridge sector](bridges/cable-stayed-bridges/bridge-2/3-lateral-view.jpg)
The black arrow represents the horizontal component force F caused by the stay cables in the horizontal sector.
Stay Cables
Figure 4 shows a schematic lateral view of the bridge.
![Schematic lateral view of a cable-stayed bridge](bridges/cable-stayed-bridges/bridge-2/4-lateral-view.jpg)
A stay cable in the horizontal sector consists of two steel wire ropes; in the inclined sector, of a single wire rope. Figure 5 shows stay cables 5 and 6 viewed from the main span.
![Stay-cables viewed from the main span](bridges/cable-stayed-bridges/bridge-2/5-stay-cables.jpg)
Stay cables 5 and 6 are sagging. Video 1 shows stay cable 6 during hand-induced vibration.
Deck Materials
Figure 6 shows the deck viewed from the main span.
![Deck materials of a cable-stayed bridge](bridges/cable-stayed-bridges/bridge-2/6-roadway.jpg)
The deck in the inclined sector is made of reinforced concrete (thickness ≅ 8 cm); in the horizontal sector, of steel checker plates (thickness ≅ 0.5 cm).