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Statistical Analyses of Response Spectra on Medium-Stiff Soil Site

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Abstract:

The analyses on the statistical response spectra have an important role in determining the earthquake demand. Elastic and inelastic spectra on acceleration of the 205 records on medium-stiff soil site for SDOF systems are presented in statistical analyses. The empirical probability distributions of the spectral values are derived according to the Kolmogorov-Smirnov (KS) goodness-of-fit test. The formula for statistical average spectra of the ground motion ensemble are recommended, which are valuable for current research and code revisal. The results show that the statistical averaged elastic α spectra fits well to the design spectra prescribed in Chinese code when the period is smaller than 2s. The inelastic responses decrease with the increase of ductility demand μ when μ<4. The coefficients of variance of the elastic and inelastic spectra are still large and the dispersion cannot be ignored. The probabilistic distribution of the spectra value on acceleration is validated as the lognormal distributions. The proposed formulas give a good fit to the statistical average values.

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Periodical:

Applied Mechanics and Materials (Volumes 90-93)

Pages:

1549-1554

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.90-93.1549

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Online since:

September 2011

Authors:

Wen Feng Liu, Xue Zhong Chen, Jie Ying Sui

Keywords:

Empirical Probability Distribution, Kolmogorov-Smirnov (KS) Goodness-of-Fit Test, Medium-Stiff Soil Site, Response Spectra, Statistical Average Spectra Formula

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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