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 |
| 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 shown above lies along a straight axis. Figure 3 shows a further hanger cable.
A kink in the upper region of the hanger cable is noticeable. Figure 4 shows a further hanger cable.
A kink in the bottom region of the hanger cable is noticeable.
What are the main consequences?
Spanning Cables
Figure 5 shows a schematic cross-section of the bridge.
Over the girder are placed three timber stringers, and the deck consists of timber planks. A single hanger cable runs from the left main cable to the right main cable via the girder's bottom side. The hanger cable passes through the girder through two vertical holes and is directly connected to the girder.
There are three spanning cables; they are anchored at the abutments and pass through the girders via horizontal holes. 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.