33.3. Damping and its Influence on the Spectra

Try these first

1. 1.

   What does a higher damping ratio do to spectral ordinates?

   Hint

   Remember the relationship between damping and spectral values.

2. 2.

   What is a common damping ratio level in structural engineering?

   Hint

   Think about typical values used in design.

3. 3.

   What happens to the spectral ordinates as the damping ratio increases?

   • They increase
   • They decrease
   • They remain constant

   Hint

   Consider the effect of damping on energy dissipation.

4. 4.

   True or False: A family of response spectra can help assess the influence of damping on structural response.

   • True
   • False

   Hint

   Reflect on the purpose of creating multiple spectra.

5. 5.

   A structure's response is evaluated at two damping ratios: 5% and 15%. Calculate the expected change in peak response during seismic loading and discuss how this affects design choices.

   Hint

   Think about how much energy is dissipated in both cases.

6. 6.

   Develop a response spectrum curve for a building designed with damping ratios of 2%, 5%, and 10%. Discuss how each response impacts the structural design.

   Hint

   Use numerical integration methods to plot the spectral ordinates for each damping ratio.