The Non-Stationary Characteristic Study of Multidimensional Ground Motion by HHT Method: A Case Study from the Chi-Chi Earthquake
Based on HHT method, the influences of site conditions and epicenter distance on non-stationarity of multidimensional ground motion were studied. Additionally, preliminary statistics were carried out on frequency characteristics of multidimensional ground motion under different site conditions. The analysis results showed that HHT method was more accurate in a quantitative description of frequency-domain non-stationarity of ground motion than zero-crossing rate method, and also can reflected the non-stationarity of multidimensional ground motion better.
H. G. Chen et al., "The Non-Stationary Characteristic Study of Multidimensional Ground Motion by HHT Method: A Case Study from the Chi-Chi Earthquake", Applied Mechanics and Materials, Vols. 90-93, pp. 1490-1497, 2011