A statically determinate structure undergoes a support settlement without temperature change. Under ideal small-displacement elastic assumptions, what is the main effect?
Correct answer: A. It changes the displacement but not the internal force system
- A. It changes the displacement but not the internal force system
- B. It creates an extra axial force
- C. It creates an extra bending moment
- D. It changes the material modulus
Explanation
A statically determinate structure can adjust to support settlement without developing force changes caused by compatibility restrictions. The structure does undergo displacement, but its internal forces remain governed by equilibrium and the applied loads.
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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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