General Information
Figure 1 shows a pedestrian suspension bridge.
| Type | Three-span suspension bridge |
| Main span | ≅ 50 m |
| Deck width | ≅ 2.5 m |
| Deck width to main span ratio | ≅ 1:20 |
| Pylon | Steel and reinforced concrete (H-shaped) |
| Girder | Steel twin H-girder |
Turnbuckles
Figure 2 shows a schematic lateral view of the bridge.
The main cables are connected to turnbuckles.
Figure 3 shows a side view of a turnbuckle.
The turnbuckle length l ≅ 2 m. Figure 4 shows an enlarged view of a turnbuckle.
The turn element is fixed by welded U-bars.
Main Span Lighting
Figure 5 shows the lighting layout of a main span sector.
The distance between the lamps is equal; there are no lamps in position A (flipped position of B). Figure 6 shows a B-lamp.
The main cable touches the lamp.
Hanger Cable to H-Girder Connection Failure
Figure 7 shows a schematic partial cross-section of the bridge.
Figure 8 shows an schematic cross-section of the hanger cable to H-girder connection.
Hanger cable and H-girder are connected by a holed T-bar, two carriage bolts, a bottom plate, and two nuts. A hanger cable to H-girder connection viewed from above and from below is shown in figures 9 and 10, respectively.
Figure 11 shows a failed connection.
The failure is located in the bottom flange region.
Does this failure affect the safety of the bridge?