Truss compression and tension forces help

In summary, the space truss is showing compression and tension forces acting on its members. The unknown forces F1, F2, and F3 can be determined by calculating the summation of Fx, Fy, and Fz. However, there is no reaction force for F1, which may cause difficulties in determining its value. To help with this, A and B can be attached to a vertical wall to provide support. The force needed on the wall at the level of F3 can prevent the wall from being pulled over by F. Some concerns were raised about the picture, as the x component of F1 may not be balanced at the joint due to the orientation of the other three members in the yz plane.
  • #1
gozita73
15
0
The space truss showin has compression and tension forces acting in the members as shown.

t6pfg1.png


Force F is 10kN, determine the three unknown forces (F1, F2 and F3).


I know that it should be the summation of Fx, Fy and Fz, however for F1, there is no reaction force, so I don't know what to do.

Can somebody please help?
 
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  • #2
Attach A & B to a vertical wall.
What force is needed directly on the wall at the level of F3 to stop the wall from being pulled over by F.
 
  • #3
so the x component of F1 would be supported by the wall??
 
  • #4
bump ?
 
  • #5
gozita73 said:
so the x component of F1 would be supported by the wall??
I'm not too good looking at 3D, but something appears wrong with your picture. There appears to be no way for the x component of the F1 force to be balanced at the joint, since the other 3 members all lie in the yz plane, unless the picture is misleading or incomplete?
 

What is a truss and how does it work?

A truss is a structural element that is made up of interconnected triangles. It is used to support and distribute weight or forces in a structure. When a load is applied to a truss, the force is evenly distributed along the length of the truss, making it strong and stable.

What are compression and tension forces?

Compression and tension are two types of forces that act on a truss. Compression forces push or squeeze the truss together, while tension forces pull or stretch it apart. These forces are essential in maintaining the stability and strength of a truss structure.

How does a truss handle compression and tension forces?

A truss is designed to efficiently handle compression and tension forces. The triangular shape of a truss allows it to distribute the forces evenly, preventing any one part from bearing too much weight. This allows the truss to withstand high levels of compression and tension without collapsing.

What factors affect the amount of compression and tension forces in a truss?

The amount of compression and tension forces in a truss depends on several factors. These include the type of material used, the shape and size of the truss, the angle and magnitude of the applied load, and the overall design of the truss structure.

Why is it important to consider compression and tension forces in truss design?

Considering compression and tension forces is crucial in truss design because it ensures that the structure is strong and stable. By understanding these forces, engineers can design trusses that can withstand the expected loads and prevent any potential failures or collapses. This is especially important in large structures, such as bridges and buildings, where the consequences of a truss failure can be catastrophic.

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