General Information
Figure 1 shows a hybrid cable-stayed suspension bridge that is used by motorcycles, bicycles and pedestrians.
| Type | Three-span hybrid cable-stayed suspension bridge |
| Main span | ≅ 100 m |
| Deck width | ≅ 2 m |
| Girder | Steel underslung truss/through-truss |
| Pylon | Reinforced concrete (A-longitudinal shaped) |
| Stay cable arrangement | Radial (two cable planes) |
Structural Concept
Figure 2 shows a schematic lateral view of the bridge.
The underslung trusses are connected to hanger cables; the through-truss, to hanger and stay cables. The transition regions between underslung truss to through-truss are shown in figure 3.
| Shore 1 | Shore 2 |
The through-truss has end posts only on shore 1, where the underslung and through-truss overlap. Bent caps and trusses are at different elevations (h3>h2>h1). Figure 4 shows half main span viewed from shore 2.
Does the bridge have a structural safety or serviceability problem without the stay cables?
Main and Stay Cables
Figure 5 shows the main and stay cables in the anchorage region.
The cables are covered by vegetation.
There are four cable types: type 1 is used for main cables, types 2, 3, and 4 are used for stay cables. Figure 7 shows the four cable types.
