41.5. Response Reduction Factor (R)

Try these first

1. 1.

   What does the Response Reduction Factor (R) represent?

   Hint

   Think about how structures react to seismic forces.

2. 2.

   Is a higher R value better for a building's seismic design?

   Hint

   Recall the values associated with different structural systems.

3. 3.

   What does a higher Response Reduction Factor (R) indicate?

   • Lower ability to absorb forces
   • Higher ability to absorb forces
   • No impact on design

   Hint

   Think about what ductility means in terms of seismic resistance.

4. 4.

   True or False: An ordinary RC moment frame has an R value of 5.

   • True
   • False

   Hint

   Recall the table of R values presented.

5. 5.

   Design a small three-story building using a barycentric braced frame system for a seismic zone with an R value of 4. Discuss how you would approach calculation of seismic forces.

   Hint

   Pay attention to how the R value influences overall forces.

6. 6.

   Analyze how choosing an R value of 3 versus 5 affects material costs in a high-seismic area. Discuss using examples.

   Hint

   Consider reinforcement type and quantity.