30. Spectral Acceleration

Try these first

1. 1.

   Define Spectral Acceleration in your own words.

   Hint

   Think about how structures behave during earthquakes.

2. 2.

   What does SDOF stand for?

   Hint

   Consider how we simplify structural analysis.

3. 3.

   What does Spectral Acceleration measure?

   • Maximum ground acceleration
   • Maximum acceleration response of a structure
   • Average ground motion

   Hint

   Focus on building behavior rather than ground motion.

4. 4.

   True or False: Spectral Acceleration is only relevant for single degree of freedom systems.

   • True
   • False

   Hint

   Refer to modeling assumptions discussed in class.

5. 5.

   A building has a natural period of 0.8s and is located in a zone with a high seismic factor. Calculate the expected spectral acceleration if the damping ratio is 5%.

   Hint

   Use the design charts from IS 1893 to derive Sa for specific parameters.

6. 6.

   Discuss how one could improve the spectral response of a tall building in a soft soil area.

   Hint

   Think about various engineering strategies to combat soft soil challenges.