Civil Engineering MCQAE Level Civil Engineering
The degree of static indeterminacy of a rigid-jointed plane frame with m members, j joints, and r external reactions is:
Structural AnalysisFrame IndeterminacyMEDIUM
Choose the correct answer
A
m + r - 2j
B
3m + r - 3j
C
2m + r - 3j
D
m + r - 3j
Correct Answer
B. 3m + r - 3j
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For a rigid-jointed plane frame, each member contributes 3 force unknowns. DSI = 3m + r - 3j, using 3 equilibrium equations per joint.
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