Civil Engineering MCQAE Level Civil Engineering
For a beam element with rotational DOF only at each of its two nodes (ignoring axial deformation), the stiffness matrix has the order:
Structural AnalysisStiffness MatrixMEDIUM
Choose the correct answer
A
2×2
B
4×4
C
6×6
D
3×3
Correct Answer
A. 2×2
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With only rotational DOF at 2 nodes: 2 DOF total → 2×2 stiffness matrix relating end moments {M_AB, M_BA} to end rotations {θ_A, θ_B}.
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