Correlation of the Emergency Handling Peak Ground Acceleration (PGA) for High-speed Railway and Strong-motion Indices using K-net Data

摘要

The emergency handling Peak Ground Acceleration (PGA) has been used as a measure of braking for High-speed Railway (Shinkansen) during earthquake in Japan, and it necessitates to know the correlation between PGA and other strong motion indices, e.g. un-filtered Peak Ground Acceleration (PGA_u), Japan Meteorological Agency seismic instrumental intensity (I_(JMA)), Spectrum Intensity (SI), Arias Intensity (I_a), Cumulative Absolute Velocity (CAV), and Cumulative Differential of Energy (DE). The PGA and other ground motion indices were calculated using the selected data set from K-net, in which consists of 2714 three-component records selected from 16 earthquake events occurred in Japan. The relationships between the PGA, and PGA_u, I_(JMA), SI, I_a, CAV, and DE were then derived performing a linear regression analysis. Our Results indicate that the PGA shows higher correlation with I_(JMA) or SI than other ground motion indices, which may be useful for deployment of new parameters of emergency handling during earthquake for High-speed Railway.