General Information
Figure 1 shows a suspension bridge that is used by motorcycles, bicycles and pedestrians.
| Type | Single-span suspension bridge |
| Main span | ≅ 110 m |
| Deck width | ≅ 1.5 m |
| Deck width to main span ratio | ≅ 1:73 |
| Pylon | Reinforced concrete (H-shaped) |
| Girder | Timber transverse beam |
Hanger Cables
Figure 2 shows a hanger cable.
The hanger cables are also connected to the barrier cables by U-bolt clamps and plates. The hanger cable lies along the straight axis. Figure 3 shows a further hanger cable.
A kink in the upper region of the hanger cable is noticeable. Figure 4 shows another hanger cable.
The bottom region of the hanger cable does not lie along the straight axis.
What are the main consequences?
Spanning Cables
Figure 5 shows a schematic partial cross-section of the bridge.
There are three spanning cables; they are anchored at the abutments, placed below the stringers, and pass through the girders via horizontal holes. The hanger cable connects the girder's bottom side directly (cable-girder contact). Figure 6 shows a bottom view of the bridge.
The spanning cables are marked by the numbers.
Torsional Vibration
Video 1 shows the torsional vibration of the deck during pedestrian-induced excitation.