For a statically indeterminate structure, a support settlement can produce internal stresses because the settlement is restrained by
Correct answer: C. Compatibility of deformation
- A. Equilibrium alone
- B. Material density only
- C. Compatibility of deformation
- D. The member's unloaded weight
Explanation
In an indeterminate structure, support movement may be incompatible with the undeformed geometry unless members develop additional forces. Compatibility equations therefore generate internal stresses even when no new external load is applied.
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About Structural Analysis
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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