Bridge Forces: Identifying Compression vs Tension | Homework Help

In summary, determining whether a member is in compression or tension in a bridge with external forces is not easy to do by inspection, especially when numerical values are given. It is generally not possible to find the tension or compression for most members without knowing the magnitude of the applied forces. It is not recommended to determine tension or compression by inspection, except in obvious cases for specific members.
  • #1
faradayscat
57
8

Homework Statement


How would you determine whether a member is in compression or tension given the bridge with external forces below?

Homework Equations


None.

The Attempt at a Solution


I don't need help finding the forces, I need help in figuring out compression/tension.
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  • #2
It is not easy to determine compression or tension by inspection when numerical applied loads are given, except perhaps for a member or 2. When you don't have numerical values for the applied loads, generally you can't find tension or compression for most members, even by analysis, because it depends on the magnitudes of the applied forces. I don't recommend finding tension or compression by inspection except in the most obvious cases for specific members.
 

1. What is the difference between compression and tension forces in a bridge?

Compression and tension are two types of forces that act on a bridge. Compression forces push or squeeze the components of a bridge together, while tension forces pull or stretch them apart.

2. How can you identify compression and tension forces in a bridge?

Compression forces are typically seen in a bridge's support structures, such as columns or piers, where the weight of the bridge and its load are pushing down. Tension forces are often found in the bridge's cables or suspension elements, where they are being pulled taut to support the weight.

3. Why is it important to identify compression and tension forces in a bridge?

Understanding the distribution of compression and tension forces in a bridge is crucial for ensuring its structural integrity and safety. It can also help engineers make informed decisions about the design and maintenance of the bridge.

4. Can bridges experience both compression and tension forces at the same time?

Yes, bridges can experience both compression and tension forces simultaneously. In fact, most bridges are designed to distribute and balance these forces to withstand the weight of the bridge and its load.

5. How do weather and environmental factors affect compression and tension forces in a bridge?

Extreme weather conditions, such as high winds or heavy snow, can increase the amount of tension and compression forces on a bridge. This is why engineers must consider these factors when designing and maintaining a bridge to ensure its safety and stability.

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