Structural Analysis - Study Mode
[#51] The degree of static indeterminacy of a rigid-jointed space frame is (where m, r and j have their usual meanings)
Correct Answer
(D) 6m + r - 6j
[#52] Castigliano’s first theorem is applicable
Correct Answer
(C) Only when principle of superposition is valid
[#53] Which of the following methods of structural analysis is a force method?
Correct Answer
(B) Column analogy method
[#54] Principle of superposition is applicable when
Correct Answer
(A) Deflections are linear functions of applied forces
Explanation
Solution: The principle of superposition is applicable when the deflections in a structure are linear functions of the applied forces. This principle holds when the relationship between force and displacement is directly proportional, meaning that the total displacement caused by multiple forces is the sum of the displacements due to each force acting individually. For this to be valid, the material must behave elastically and within its linear range, which is often governed by Hooke's law.
[#55] The effective and actual lengths of a cantilever are same if continuous at the support,
Correct Answer
(C) Restrained against torsion at the support and free at the end