General Information
Figure 1 shows a pedestrian suspension bridge.
| Type | Three-span suspension bridge |
| Main span | ≅ 70 m |
| Deck width | ≅ 2 m |
| Deck width to main span ratio | ≅ 1:35 |
| Pylon | Reinforced concrete (A-type, longitudinal) |
| Girder | Steel truss |
Side Spans
Figure 2 shows a side span.
The side span s ≅ 10 m. Figure 3 shows the truss girder.
The truss girder is made of L-sections. The height h and the hanger cable spacing d ≅ 0.9 m. Figure 4 shows the side span without hanger cables (single-span suspension bridge with two approach spans).
Do the side spans affect the structural behavior of the main span?
Side Span Hanger Cables Vibrations
Figure 5 shows the bridge viewed from a side span.
Video 1 shows hanger cables 1 and 2 during hand-induced vibration.