The 'ductility' of RC structures is improved under earthquake loading by:
Choose the correct answer
Using higher grade concrete only
Confinement hoops, under-reinforced sections, strong column-weak beam hierarchy, avoiding laps in hinge zones
Increasing rebar diameter only
Eliminating ties and stirrups for speed
Correct Answer
B. Confinement hoops, under-reinforced sections, strong column-weak beam hierarchy, avoiding laps in hinge zones
Why is this the answer?
Ductility in RCC: (1) Confinement reinforcement (IS 13920 — closely spaced hoops/spirals confine concrete, increase ductility in columns and joints); (2) Balanced or under-reinforced section (not over-reinforced); (3) Avoiding lap splices in plastic hinge zones; (4) Strong column — weak beam design (hierarchy of strength); (5) Avoiding abrupt changes in stiffness. Higher ductility = more energy absorption.
Related RCC MCQs
More solved RCC questions for AE/JE Civil Engineering exams.
- For a circular RC water tank with rigid base, the hoop tension is maximum at:
- The 'end block' in a post-tensioned member is specially designed for:
- The 'torsion' in RC beams is resisted by:
- The 'minimum clear cover' for reinforcement in a RCC beam in severe exposure (IS 456) is:
- A 'shear wall' in a multi-storey RC building acts as:
- The 'equivalent frame method' for flat slab design divides the structure into:
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