Study on the Physical Measure of Seismic Intensity

Abstract eng:
The isoseismal of seismic intensity of Chi-Chi Earthquake is plotted based on the seismic damage to buildings subjected to this devastating earthquake. Then the study calculated the average value of Einput (input energy), Eh (hysteretic energy), PGA (peak ground acceleration), PSV (peak spectrum velocity), Arias intensity, EPA (effective peak acceleration), PGV (peak ground motion velocity) and PSD (peak spectrum displacement) of station records in each intensity zone. The linear regression between the average value and the seismic intensities based on the least-square method are carried on. The result shows that Einput, Eh, PGA, PSV, Arias intensity and EPA have good correlation with the intensity and they can serve as the physical measure of seismic intensity. The conclusion drown by this paper is based on the records and damage data of the single Chi-Chi earthquake. Hence, the conclusion is more scientific and authentic in comparison with the results from data of different earthquakes before.

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