The 'principle of superposition' in structural analysis applies when:
Choose the correct answer
Any structure regardless of material behaviour
Linear elastic structures (small deformations, Hooke''s law satisfied) only
Only for statically determinate structures
Plastic analysis and inelastic behaviour
Correct Answer
B. Linear elastic structures (small deformations, Hooke''s law satisfied) only
Why is this the answer?
Principle of superposition: total response (displacement, stress, moment) = sum of individual responses when loads act independently. Valid ONLY for linear elastic behaviour (small deformations, material in elastic range). NOT valid for: geometric nonlinearity (large deflections, P-delta), material nonlinearity (plastic zones), buckling, or supports that change under load.
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