27.6. Seismogram Parameters

Try these first

1. 1.

   What does PGA stand for?

   Hint

   Think about how much the ground shakes.

2. 2.

   What does PGD measure?

   Hint

   Consider how far the ground has shifted.

3. 3.

   What does PGA represent in seismography?

   • Peak Ground Acceleration
   • Peak Ground Activity
   • Primary Grounding Area

   Hint

   Consider what parameter influences building safety.

4. 4.

   Is PGV related to potential structural damage?

   • True
   • False

   Hint

   Recall the relationship between velocity and damage potential.

5. 5.

   Given a seismogram shows PGA of 1.0g, PGV of 20 cm/s, and PGD of 5 cm, assess the potential structural integrity risks for a building designed to withstand 0.6g.

   Hint

   Compare the design specifications with the measured values.

6. 6.

   A new building site records PGV exceeding 30 cm/s on multiple occasions. Discuss possible engineering adjustments or actions to be taken.

   Hint

   Consider the implications of ground motion on material fatigue.