General Information

Figure 1 shows a cable-stayed bridge that is used by motorcycles, bicycles and pedestrians.

Cable-stayed bridge.
Cable-stayed bridge over a river
Type Single-span cable-stayed bridge
Main span ≅ 125 m
Deck width ≅ 2 m
Girder Steel twin I-girder
Pylon Reinforced concrete (A-type, longitudinal)
Stay cable arrangement Radial (two cable planes)

Arrangement of Stay Cables

Figure 2 shows a schematic lateral view of the bridge.

Lateral view.
Schematic lateral drawing of a cable-stayed bridge.

The numbers mark the locations of the girder anchorages. The distance between two anchorages (s) is decreasing in the mid-region. Anchorages 5 and 6 are placed nearby, as shown in figure 3.

Anchorages 5 and 6.
Nearby connected stay cables in the main span mid-region.
  • What are some possible reasons for the above shown stay cable arrangement?