The portion of truss shown represents the upper part of a power transmission line tower. The 2.7 kN force is 60° from the vertical. For the given loading, determine all zero force members. a. Use the Method of Section to find the forces in members BC, EH and EJ; b. Use the Method of Joints to find the forces in members BD and DE;

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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The portion of truss shown represents
the upper part of a power transmission
line tower. The 2.7 kN force is 60° from
the vertical. For the given loading,
determine all zero force members.
a. Use the Method of Section to find the FEH = 2.9228 kN, C
Answers:
FBC = 0.9878 kN, T
forces in members BC, EH and EJ;
b. Use the Method of Joints to find the
FEJ = 0.5841 kN, C
FBD = 1.3171 kN, T
FDE = 0.3576 kN, C
%3D
forces in members BD and DE;
1.60 m
-2.21 m-
B
2.21 m-
Al
0.60 m
0.60 m
E
2.7 kN
1.20 m
1.2 kN
H
0.60 m
0.60 m
K
-2.97 m-
1.2 kN
1.20 m
N
1.2 kN
M!
0.60 m
0.60 m
R
1.2 kN
1.2 kN
T
Transcribed Image Text:The portion of truss shown represents the upper part of a power transmission line tower. The 2.7 kN force is 60° from the vertical. For the given loading, determine all zero force members. a. Use the Method of Section to find the FEH = 2.9228 kN, C Answers: FBC = 0.9878 kN, T forces in members BC, EH and EJ; b. Use the Method of Joints to find the FEJ = 0.5841 kN, C FBD = 1.3171 kN, T FDE = 0.3576 kN, C %3D forces in members BD and DE; 1.60 m -2.21 m- B 2.21 m- Al 0.60 m 0.60 m E 2.7 kN 1.20 m 1.2 kN H 0.60 m 0.60 m K -2.97 m- 1.2 kN 1.20 m N 1.2 kN M! 0.60 m 0.60 m R 1.2 kN 1.2 kN T
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