Civil Engineering MCQAE Level Civil Engineering
A fixed-ended beam of degree of static indeterminacy 2 requires how many plastic hinges to form a collapse mechanism under monotonic loading?
Structural AnalysisTheory of Structures and DesignHARD
Choose the correct answer
A
4
B
1
C
3
D
2
Correct Answer
C. 3
Why is this the answer?
A structure becomes a mechanism when r + 1 plastic hinges form; for a fixed beam, r = 2, so 3 plastic hinges are required.
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