1. Chapter 6: Structural Analysis

2. Example 6.3
Determine the force in each member of the truss. Indicate whether the members are intension or compression.

3. Example 6.3 Cy
400N 3m A B C Cx 4m
600N Ay 6m

4. Example 6.3 Cy
400N 3m A B C Cx 4m
600N Ay 6m Cy y x A
600N
FAD

5. Example 6.3 Cy
400N 3m A B C Cx 4m
600N Ay 6m y x D
FDB
FDC
450N
600N

6. Example 6.3 Cy
400N 3m A B C Cx 4m
600N Ay 6m C y x
200N
FCB
600N
200N

7. Example 6.4
Using the method of joints, determine all the zero-force members of the Fink roof truss. Assume all joints are pin connected.

8. Example 6.4
5 kN A B C H G F E D
2 kN G y x
Joint G
FGC
FGF
FGH

9. Example 6.4
5 kN A B C H G F E D
2 kN
FDC
Joint D x D y
FDE
FDF

10. Example 6.4
5 kN A B C H G F E D
2 kN F x y
FFC θ O
Joint F
FFG
FFE

11. Example 6.4
5 kN A B C H G F E D
2 kN
Joint B
2 kN B x y
FBC
FBA
FBH

12. Example 6.7
Determine the force in member EB of the roof truss. Indicate whether the member are in tension or compression.

13. Example 6.7
1000 N A F E B C D
1000 N
3000 N
1000 N
4000 N
2000 N

14. Example 6.7 1000 N A F E B C D FED 1000 N 3000 N FEB 1000 N FFB
FEDcos30°
FAB
FEDsin30°
4000 N
2000 N

15. Example 6.8
Determine the forces acting in the members of the space truss. Indicate whether the members are in tension or compression.

16. Example 6.8 z y
FAB A x
P = 4 kN
FAC
FAE
Joint A

17. Example 6.8 z y
2 kN
RAB
45° B
FAB = 4kN x
FBD
FBE
Joint B

18. Example 6.21
The 100kg block is held in equilibrium by means of the pulley and the continuous cable system. If the cable is
attached to the pin at B, compute the forces which this
pin exerts on each of its connecting members

19. Example 6.21 B
490.5 N
45° Bx By
490.5 N
Pulley B

20. Example 6.21 By
FCB B
FAB Bx
490.5 N
Pin B