What is the degree of static indeterminacy of a plane beam fixed at both ends?
Correct answer: B. Three
- A. One
- B. Three
- C. Two
- D. Six
Explanation
A fixed-ended plane beam has six reaction components, while only three independent equilibrium equations are available. Therefore, its degree of static indeterminacy is 6 minus 3, equal to 3.
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Structural analysis determines how beams, frames, trusses and arches carry loads through reactions, shear forces, bending moments, axial forces and deflections. It covers free-body diagrams, equilibrium equations, determinacy, influence lines and methods such as slope deflection, moment distribution and virtual work, while distinguishing analysis of a structure from its design.
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