Machine-translated by Google. Questions are authored in English.
Top

Discussion

A reinforced concrete frame in Zone IV is designed with a response reduction factor of 5.0 but detailed only to IS 456. The building is

  • A.over-designed, because the factor of 5.0 is unnecessarily conservative
  • B.unsafe, because the reduction taken against the elastic demand has not been earned
  • C.safe, because IS 456 already covers everything IS 13920 requires
  • D.safe, because the response reduction factor affects only the analysis

Answer: B

A factor of five is reserved for a frame that can yield reliably at its beam ends, and only the ductile detailing standard delivers that capacity. Designed for a fifth of the elastic force and detailed for none of the ductility, such a frame has neither the strength to stay elastic nor the ability to deform safely.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.