What is the bending moment at an internal hinge in a structural member?
Correct answer: B. Always zero
- A. Equal to the support reaction
- B. Always zero
- C. Equal to the shear force
- D. Equal to the axial force
Explanation
An internal hinge permits rotation and cannot transmit bending moment, so the bending moment at its location is zero. It can still transmit axial force and shear force unless other conditions prevent them.
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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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