Flexibility Method: Truss Solve the following problem: Problem 3: Given: The following truss: The area of all bars, A = 5 in.? E = 30,000 ksi. %3D 30 20'- 120 kips - 20' Required: Compute the reactions and all the bar forces for the statically indeterminate truss. Approach:
Flexibility Method: Truss Solve the following problem: Problem 3: Given: The following truss: The area of all bars, A = 5 in.? E = 30,000 ksi. %3D 30 20'- 120 kips - 20' Required: Compute the reactions and all the bar forces for the statically indeterminate truss. Approach:
Chapter9: Application Of Influence Lines
Section: Chapter Questions
Problem 11P
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![Flexibility Method: Truss
Solve the following problem:
Problem 3:
Given: The following truss:
The area of all bars, A = 5 in.?
E = 30,000 ksi.
30'
120 kips
-20'-
20'-
Required: Compute the reactions and all the bar forces for the statically indeterminate truss.
Approach:
Select [C3] as the redundant (assume it positive to the left)
Summarize the bar forces for Primary 0 directly on a sketch of truss Primary 0. A bar
force in tension must be shown as a positive quantity with a (T) next to it; a bar force in
compression must be shown as a negative quantity with a (C) next to it. Keep the sign.
Summarize the bar forces for Primary 1 directly on a sketch of truss Primary 1.
Summarize final reactions and bar forces directly on a sketch of the final truss.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9f65b2c6-5600-49a7-a538-21540f87dcd9%2F9ae20c86-f976-4012-817a-bd4c6f1b5d61%2Fvp9g71c_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Flexibility Method: Truss
Solve the following problem:
Problem 3:
Given: The following truss:
The area of all bars, A = 5 in.?
E = 30,000 ksi.
30'
120 kips
-20'-
20'-
Required: Compute the reactions and all the bar forces for the statically indeterminate truss.
Approach:
Select [C3] as the redundant (assume it positive to the left)
Summarize the bar forces for Primary 0 directly on a sketch of truss Primary 0. A bar
force in tension must be shown as a positive quantity with a (T) next to it; a bar force in
compression must be shown as a negative quantity with a (C) next to it. Keep the sign.
Summarize the bar forces for Primary 1 directly on a sketch of truss Primary 1.
Summarize final reactions and bar forces directly on a sketch of the final truss.
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