General Information

Figure 1 shows a multi-span pedestrian suspension bridge with four central spans.

Multi-span pedestrian suspension bridge.
Multi-span pedestrian suspension bridge over a river
Type Multi-span suspension bridge
Main span ≅ 110 m
Deck width ≅ 2.5 m
Deck width to main span ratio ≅ 1:44
Pylon Reinforced concrete
Girder Steel transverse beam

Pylons

Figure 2 shows a schematic lateral view of the bridge.

Lateral view.
Lateral view of a multi-span pedestrian suspension bridge

There are two pylon types (A and B); type A is shorter than type B, and the spans are approximately equal. Figure 3 shows the pylons of spans 2 and 3, while figure 4 shows the pylons of span 3.

Pylons (spans 2 and 3).
Pylons with different heights
Pylons (span 3).
Asymmetric main cable curve of a multi span pedestrian suspension bridge

Due to the different heights of the pylons, the main cable curve is asymmetric.

  • What are the main structural differences between pylons A and B?