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http://dx.doi.org/10.5000/EESK.2012.16.1.037

Study on the Use of Bracketed Summations of the Peak Ground-motion Acceleration Per Second for Rapid Earthquake Alert Notifications  

Yun, Kwan-Hee (한전 전력연구원)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.16, no.1, 2012 , pp. 37-45 More about this Journal
Abstract
In an effort to further exploit the peak ground-motion acceleration (PGA) information per second available in real time by the enacted law, bracketed summations of the PGA per second ($BSPGA_k$) for 30 seconds based on the records with a rate of 100 samples were compared with the cumulative absolute velocity (CAV) and earthquake intensities based on a worldwide database of records from small-to-large earthquakes. The CAV, currently in use as an earthquake damage indicator for nuclear power plants due to its strong correlation with the earthquake intensity, has the disadvantage of requiring a massive amount of digital data with a rate of more than 100 samples per second. The comparative study shows that the $BSPGA_k$ is well correlated with the CAV over the wide range of strong ground-motion levels, which suggests that the $BSPGA_k$ is one of the new promising ground-motion parameters especially useful for rapid earthquake alert notifications through an earthquake monitoring network. Based on the domestic database of records from small-to-moderate earthquakes with felt reports, it is also observed that the $BSPGA_k$ is comparable to the CAV and better than the PGA in predicting the intensity by using the correlation relation.
Keywords
Rapid earthquake alerts notifications; Ground-motion earthquake damage indicator; Bracketed summation; Peak ground acceleration per second; Cumulative Absolute Velocity; Intensity;
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