Question

1. The truss shown in the figure is supported by a pin at A and a roller at H. 5 kN CDEF 10 kN 30° N 1.6 m 0.8 m B KJ I H G L 20 kN A 0.8 m 0.8 m 0.8 m 0.8 m 0.8 m a) [6 points] Identify all the zero\_force members in the truss. b) [7.5 points] Draw a complete simplified truss that results when eliminating all zero-force members identified above. c) [15 points] Calculate the support reactions at A and H. d) [9 points] Provide a joint sequence to enable the finding of the force in all the truss members. (The support reactions are not considered unknown for the joint sequence). e) [37.5 points] Use the Method of Joints to determine the force in members OI and ED. f) [12 points] Use the Method of Sections to determine the force in the truss member ED. Ignore all calculations done in part (e). g) [Bonus: 12 points] Use the Method of Joints to determine the force in each truss member (all of them). h) [Bonus: 2points] Draw a complete summary of the forces acting on the entire truss, indicating their value and whether they are in tension (T) or compression (C). Instructions:

          1. The truss shown in the figure is supported by a pin at A and a roller at H.
5 kN CDEF
10 kN
30°
N
1.6 m
0.8 m
B
KJ
I
H
G
L
20 kN
A
0.8 m 0.8 m 0.8 m
0.8 m 0.8 m
a) [6 points] Identify all the zero\_force members in the truss.
b) [7.5 points] Draw a complete simplified truss that results when eliminating all
zero-force members identified above.
c) [15 points] Calculate the support reactions at A and H.
d) [9 points] Provide a joint sequence to enable the finding of the force in all the truss
members. (The support reactions are not considered unknown for the joint sequence).
e) [37.5 points] Use the Method of Joints to determine the force in members OI and ED.
f) [12 points] Use the Method of Sections to determine the force in the truss member ED.
Ignore all calculations done in part (e).
g) [Bonus: 12 points] Use the Method of Joints to determine the force in each truss member
(all of them).
h) [Bonus: 2points] Draw a complete summary of the forces acting on the entire truss,
indicating their value and whether they are in tension (T) or compression (C).
Instructions:

1. The truss shown in the figure is supported by a pin at A and a roller at H.
5 kN CDEF
10 kN
30°
N
1.6 m
0.8 m
B
KJ
I
H
G
L
20 kN
A
0.8 m 0.8 m 0.8 m
0.8 m 0.8 m
a) [6 points] Identify all the zeromembers in the truss.
b) [7.5 points] Draw a complete simplified truss that results when eliminating all
zero-force members identified above.
c) [15 points] Calculate the support reactions at A and H.
d) [9 points] Provide a joint sequence to enable the finding of the force in all the truss
members. (The support reactions are not considered unknown for the joint sequence).
e) [37.5 points] Use the Method of Joints to determine the force in members OI and ED.
f) [12 points] Use the Method of Sections to determine the force in the truss member ED.
Ignore all calculations done in part (e).
g) [Bonus: 12 points] Use the Method of Joints to determine the force in each truss member
(all of them).
h) [Bonus: 2points] Draw a complete summary of the forces acting on the entire truss,
indicating their value and whether they are in tension (T) or compression (C).
Instructions:

Added by Julio V.

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