40.14. Drift and Deflection Limits

Try these first

1. 1.

   What is storey drift?

   Hint

   Consider how floors move in relation to each other.

2. 2.

   What are P-Delta effects?

   Hint

   Think about how weight can shift as a building sways.

3. 3.

   What is the maximum allowable drift according to IS 1893?

   • 0.002h
   • 0.004h
   • 0.006h

   Hint

   Remember the drift percentage related to height.

4. 4.

   P-Delta effects can amplify loads in structural elements, true or false?

   • True
   • False

   Hint

   Think about additional stress caused by sway.

5. 5.

   A 30-meter building is subjected to seismic forces that lead to a drift of 0.008h. What steps should be taken to mitigate this drift?

   Hint

   Consider both structural adjustments and redesign approaches.

6. 6.

   Given a structure's drift reached 5% of the maximum allowable limit, assess the impact of P-Delta effects on safety.

   Hint

   Think about safety and additional forces at play.