Discussion
Match the parameter with what it chiefly measures.
1. Peak ground acceleration 2. Bracketed duration 3. Arias intensity
P. Total energy of the record Q. Largest single ordinate R. Time between threshold crossings
Select the correct matching.
Answer: D
Correct answer: 1-Q, 2-R, 3-P
Three parameters measuring three different things. Peak ground acceleration is the largest single ordinate of the record. Bracketed duration is the time between the first and last crossings of a threshold. And Arias intensity, being the integral of the squared acceleration, is a measure of the total energy the record carries.
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