2024 Volume 80 Issue 13 Article ID: 23-13109
For the purpose of evaluation and analysis of earthquake motion characteristics, we applied our developed method for characteristics extraction in the time-frequency domain. In this analysis, the method utilized a period-dependent feature vector based on the evolutionary power spectrum. Furthermore, the kernel density estimation was applied to the period-dependent feature vector. Next, for the comparison using to many earthquake motions, using the estimated density distribution, the singular value decomposition was applied.
As a numerical example to demonstrate the effectiveness of the proposed method, the acceleration records observed from the 2011 Off the Pacific Coast of Tohoku Earthquake were used. Consequently, the characteristics of each earthquake motions was able to extract from the principal component scores obtained from the singular value decomposition.
