Support Reactions: Forces at A & D

In summary, there are forces at A due to members ADE and ABC, and these forces will be different. As A is a fixed point, the forces at A will not be related to each other.
  • #1
princejan7
93
0

Homework Statement



http://postimg.org/image/60w1pznz9/



Are the forces at A the same for members ADE and member ABC?

Likewise, are the forces at D the same for members FDB and ADE?
 
Physics news on Phys.org
  • #2
princejan7 said:
Are the forces at A the same for members ADE and member ABC?

Likewise, are the forces at D the same for members FDB and ADE?
Not sure what you're asking. There are forces at A due to members ADE and ABC, but those two forces will be different.
 
  • #3
haruspex said:
Not sure what you're asking. There are forces at A due to members ADE and ABC, but those two forces will be different.

So for their FBD's, the forces at A will be different for member ADE, ABC, and the frame as a whole?

Are these forces at A related?
 
  • #4
Since A is a fixed point, I don't think the forces are related over there. You can probably assume that any force acting on that point of either rod will be counteracted by the ground.
 
  • #5


I would like to clarify that the forces at point A and point D are not necessarily the same for all members in this structure. This is because the forces at these points are dependent on the specific geometry and loading conditions of each member. The forces at point A will be different for members ADE and ABC because they have different orientations and lengths, resulting in different forces acting on them. Similarly, the forces at point D will be different for members FDB and ADE due to their different orientations and lengths. It is important to analyze each member individually to determine the specific forces acting on each point.
 

1. What are support reactions?

Support reactions are the forces that occur at the point of contact between a structural element and its support, such as a beam resting on a wall or a bridge on its piers. These reactions are necessary to keep the structure in equilibrium and prevent it from collapsing.

2. How do you calculate support reactions?

To calculate support reactions, you need to analyze the forces acting on the structure using the principles of statics. This involves drawing a free-body diagram and applying equations of equilibrium to find the unknown reactions at the supports. The type of support (fixed, pinned, or roller) and the type of load (point, distributed, or concentrated) will also affect the method of calculation.

3. Why are support reactions important?

Support reactions are important because they determine the internal forces and stresses within a structure. They also ensure that the structure remains stable and does not experience excessive deflection or collapse. Understanding support reactions is crucial in the design and analysis of any structure.

4. What factors can affect support reactions?

The magnitude and direction of support reactions can be affected by various factors, such as the type and location of the supports, the type and magnitude of the load, and the geometry and material properties of the structure. Any changes in these factors can alter the support reactions and must be considered in the analysis.

5. How do support reactions affect the design of a structure?

Support reactions play a significant role in the design of a structure as they determine the size and shape of structural elements. Engineers must ensure that the support reactions do not exceed the capacity of the supports or cause excessive stresses in the structure. In some cases, additional supports may be needed to distribute the load and reduce the support reactions.

Similar threads

  • Introductory Physics Homework Help
Replies
7
Views
527
  • Introductory Physics Homework Help
Replies
8
Views
1K
  • Introductory Physics Homework Help
Replies
2
Views
981
  • Introductory Physics Homework Help
Replies
12
Views
1K
  • Introductory Physics Homework Help
Replies
6
Views
826
Replies
6
Views
784
  • Introductory Physics Homework Help
Replies
11
Views
3K
  • Introductory Physics Homework Help
Replies
6
Views
905
  • Introductory Physics Homework Help
Replies
4
Views
2K
  • Introductory Physics Homework Help
Replies
1
Views
2K
Back
Top