ESTIMATION OF DYNAMIC RESPONSE OF ELASTO-PLASTIC SDOF SYSTEMS BY WAVELET COEFFICIENTS : Relationship between discrete wavelet transform of seismic waves and input energy Part 2
Jun Iyama · Journal of Structural and Construction Engineering (Transactions of AIJ) · 2004
The author showed that dynamic responses of elastic SDOF systems can be estimated with the wavelet coefficients of the input ground motions and the Fourier spectrum of the mother wavelet ih the previous paper. In this paper, an estimation method of elasto-plastic response of a SDOF svstem based on wavelet coefficients was proposed, and the relationship between the estimation precision and the characteristics of the mother wavelet was investigated. As a result of numerical analyses using Daubechies N=2 and N=10 wavelets, it was shown that the method could estimate the plastic response with good precision, in case that the natural period of the SDOF system is in the range of the predominant period of the input ground motions. However, about the case that the natural period is out of the range of the predominant period, further research should be required to improve the precision of the estimation.