Ductile Detailing of RC members as per IS 13920 is essential to
- AIncrease the initial stiffness of the building.
- BMake the building lighter by using less reinforcement.
- CAllow the structure to undergo large inelastic deformations without sudden collapse.Correct
- DEnsure that the beams are stronger than the columns.
Solution
Concept
Ductile Detailing in Reinforced Concrete Structures
Formula
N/A
Step-by-step solution
1. Identify the objective of ductile detailing of reinforced concrete members according to IS 13920. 2. Recall that ductile detailing allows structures to undergo large inelastic deformations and absorb earthquake energy without sudden collapse. 3. Select Option C as the correct choice.
Explanation
Ductile detailing according to IS 13920 helps a building absorb and bend under strong earthquake forces without breaking suddenly, giving occupants time to safely evacuate before any collapse occurs.
Shortcut
To remember the purpose of Ductile Detailing (IS 13920), use the simple phrase "Bend, Don't Break": - Bend (Deform): Allows the structure to undergo large inelastic deformations and absorb earthquake energy. - Don't Break (No Collapse): Prevents sudden brittle collapse, giving occupants time to safely evacuate.
Common mistake
A common mistake is selecting option A by confusing ductility with stiffness, assuming ductile detailing aims to make a structure rigid rather than flexible. Another frequent mistake is selecting option D by confusing the concept with the "strong-column weak-beam" principle, incorrectly assuming beams should be stronger than columns when IS 13920 actually requires columns to be stronger than beams to prevent storey collapse.
Correct answer: C) Allow the structure to undergo large inelastic deformations without sudden collapse.