30.1. Ground Motion and Structural Response

Try these first

1. 1.

   What is Peak Ground Acceleration (PGA)?

   Hint

   Think about what represents the strongest shaking during an earthquake.

2. 2.

   Define Single Degree of Freedom (SDOF) system.

   Hint

   Consider how masses move when pushed or pulled.

3. 3.

   What does Peak Ground Acceleration (PGA) represent?

   • The lowest ground acceleration
   • The maximum ground acceleration
   • The average ground speed

   Hint

   Focus on what would be the most intense shaking during an earthquake.

4. 4.

   True or False: SDOF systems capture complex multi-dimensional forces in structures.

   • True
   • False

   Hint

   Remember the simplification aspect of SDOF.

5. 5.

   Given an earthquake with a recorded PGA of 0.5g, calculate the potential structural response for an SDOF system with a mass of 1000 kg and a damping ratio of 5%.

   Hint

   Think about how mass affects response under given ground accelerations.

6. 6.

   Explain the effects of varying soil types on PGA and how this influences SDOF system results.

   Hint

   What role does soil play in seismic wave propagation?