27.6.3. Peak Ground Displacement (PGD)

Try these first

1. 1.

   What does PGD stand for?

   Hint

   Think about the components of ground motion.

2. 2.

   Why is understanding PGD important for engineers?

   Hint

   Consider safety and structural integrity.

3. 3.

   What is the definition of Peak Ground Displacement (PGD)?

   • Maximum ground speed
   • Maximum ground movement
   • Average ground shift

   Hint

   Focus on the term 'displacement' in the definition.

4. 4.

   True or False: PGD is only relevant for new construction.

   • True
   • False

   Hint

   Think about how existing buildings can experience effects from earthquakes.

5. 5.

   Assess a hypothetical situation where a city's main structures were designed without considering PGD, leading to significant displacement during an earthquake. How should the structural engineers redesign these buildings?

   Hint

   Think about how materials and design can help manage ground movement.

6. 6.

   Given a PGD of 3 meters in a recent earthquake, analyze how this would affect existing buildings built to standards of PGD of only 1 meter.

   Hint

   Consider the difference in design standards and the ground's actual movement.