Practice Directionality And Peak Acceleration (35.14) - Concept of Peak Acceleration

Practice: Directionality and Peak Acceleration

Lesson 35.14Concept of Peak Acceleration

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10 questions

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3 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the definition of Peak Ground Acceleration (PGA)?
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Think of it as the extreme shaking observed when an earthquake hits.
Question 2.
What is forward directivity?
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Consider how the direction of the fault affects the shaking intensity.
3Question 3.
What does PGA stand for?
- Peak Ground Acceleration
- Peak Ground Area
- Peak Ground Average
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Focus on what the term represents in geology.
4Question 4.
True or False: Forward directivity can result in increased PGA.
- True
- False
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Think about how shaking differs based on the fault direction.
Question 5.
Consider a scenario where an earthquake has a primary rupture located 5 km from a building. If the recorded horizontal PGA is 0.6g towards the building and 0.4g perpendicular to it, calculate the combined Vector PGA.
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You’ll need to apply the Pythagorean theorem here to combine the horizontal components.
Question 6.
Discuss how neglecting forward directivity can pose risks in urban planning, especially in seismic zones.
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Consider what impacts may arise from assumptions made about shaking intensity.

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