Suspension Bridges: What is the Shape Called?

In summary, the shape of a suspension bridge is called a catenary curve, named after the Latin word "catena." It is the most efficient shape for supporting heavy loads, evenly distributing weight and minimizing stress. The catenary curve is formed by the weight of the bridge deck and tension in the cables, created by natural forces. Not all suspension bridges have a catenary shape, some may have a parabolic or hybrid shape. The advantages of using a catenary curve in suspension bridges include longer spans without additional support structures, resulting in a visually appealing and cost-effective design.
  • #1
ehrenfest
2,020
1
What is the name for the shape that the suspensions on a suspension bridge make? I think it is something like canary?
 
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  • #2
Are you thinking of catenary?
 
  • #3
Yes. Thanks.
 
  • #4
Not a trivial geometry to derive. I believe Newton was unable to solve this catenary problem, that it required near-18th century mathematics to undertake.
 
  • #5
A suspension bridge cable actually makes a parabola, a hanging cable by itself makes a catenary.
 

1. What is the shape of a suspension bridge called?

The shape of a suspension bridge is called a catenary curve. It is named after the Latin word "catena," which means "chain."

2. Why is the catenary curve used in suspension bridges?

The catenary curve is used in suspension bridges because it is the most efficient shape for supporting heavy loads. It evenly distributes the weight of the bridge and minimizes stress on the structure.

3. How is the catenary curve formed in a suspension bridge?

The catenary curve in a suspension bridge is formed by the weight of the bridge deck and the tension in the cables. The shape is created by the natural forces of gravity and tension.

4. Are all suspension bridges shaped like a catenary curve?

No, not all suspension bridges are shaped like a catenary curve. Some may have a parabolic shape, while others may have a hybrid shape that combines elements of both a catenary and a parabola.

5. What are the advantages of using a catenary curve in suspension bridges?

The use of a catenary curve in suspension bridges allows for longer spans to be created without the need for additional support structures. This results in a more visually appealing and cost-effective bridge design.

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