3.6. Damping in Building Codes and Standards

Try these first

1. 1.

   What is the assumed damping ratio for general buildings according to IS 1893?

   Hint

   Look for the standard reference the code sets for buildings.

2. 2.

   What does ASCE 7 provide for seismic design?

   Hint

   Think about how buildings may need adjustments based on materials.

3. 3.

   What damping ratio does IS 1893 assume for general buildings?

   • 3%
   • 5%
   • 10%

   Hint

   It's a common benchmark used in building codes.

4. 4.

   ASCE 7 provides which of the following for structure design?

   • True
   • False

   Hint

   Consider how adjustments are made in seismic design.

5. 5.

   Given a building code assumes a damping ratio of 5%, analyze how applying a damping modification factor of 0.77 for a different structure would affect seismic design forces.

   Hint

   Consider the relationship between spectral response and damping adjustments.

6. 6.

   Discuss how damping ratios directly correlate with energy-dissipating devices in reducing seismic loads, using compliant building designs as examples.

   Hint

   Think about specific devices and their operating principles in reducing the impact of seismic forces.