FOURIER AMPLITUDE SPECTRUM MODEL FOR STRONG GROUND MOTION
Three kinds of Fourier amplitude spectrum models for earthquake accelerogram are proposed in this paper, which can be widely used in acclerogram synthesis. Model Ⅰ can be deduced from the equation of motion of the SDOF system with bandlimited white-noise input. The shape of this model is similar to the Kanai-Tajimi spectrum model. Model Ⅱ originates from Model Ⅰ , but an additional filter is added before the input, hence Model Ⅱ is similar to the Clough- Penzien spectrum model. The same derivation method is used in Model Ⅲ as Model Ⅰ , but the inertia force is depicted by the pseudo acceleration, of which the treatment was first used in the power spectral density (PSD) of earthquake ground accelerations by S. Matsuda and K. Asano. All the above models have been applied to earthquake accelerations Fourier amplitude spectrum analysis. The investigations demonstrate that Model Ⅲ is superior to the other two models for the better fitness and narrow coefficients confidence interval.
Fourier amplitude spectrum ground motion synthetic acclerogram
Z. H. An J. Li
Department of Building Engineering, Tongji University, Shanghai, China
国际会议
上海
英文
1053-1061
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）