Trusses 2 Flashcards
1
Q
What methods of analysis can be done statically determinate trusses?
A
- Method of joints
- Method of sections
2
Q
What are the steps for method of joints?
A
- FBD of joint isolated
- Force arising form member + external force + reaction force
- Use equilibrium equations
- Distinguish if member in tension or compression
3
Q
What is a member in tension called?
A
Tie
4
Q
How is tension indicated on a FBD?
A
Force directed away from the joint
5
Q
How is compression indicated on a FBD?
A
Force directed towards the joint
6
Q
What is a member in compression called?
A
Strut
7
Q
When do structural members buckle?
A
When in compression
8
Q
What are the steps for method of sections?
A
- Divide truss in 2 FBD by imaginary cut
- Cutting can be straight or curved
- member force revealed where cut
- 3 equation so section should cut 3 members
9
Q
When should method of sections be used?
A
When trying to find forces in only a few members
