EVALUATION OF ENERGY AND SEISMIC EFFECT OF EARTHQUAKE WAVE BASED ON HHT ANALYSIS

The Hilbert spectra of frequency-time-amplitude can be obtained by HHT and be applied to dynamic analysis of the seismic signal.A quantitative index to evaluate strength of vibration effect by the use of the maximum energy (integral of the time-domain frequency density function) and the crest factor of earthquake wave are put forword,as a preliminary unified criterion of vibration effect,and the feasibility and reliability of the criterion are validated by several instances.