According to Castigliano's second theorem, the partial derivative of strain energy with respect to an applied load gives the corresponding
Correct answer: B. Displacement
- A. Support reaction
- B. Displacement
- C. Bending stress
- D. Section modulus
Explanation
Differentiating total strain energy with respect to a load gives the displacement in the direction of that load. Differentiation with respect to a moment similarly gives the corresponding rotation.
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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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