максимальное ускорение грунта во время землетрясения(Zero period ground accelaration = Peak ground acceleration: The so-called zero period acceleration (ZPA) is the maximum ground acceleration during the event,
This is also the high-frequency asymptotic value of the absolute acceleration (or pseudoacceleration) in the response spectrum. It corresponds to the F-G part of the idealized spectrum.comsol.comDRE)
