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PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM
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Masato TAMAI, Masanori HORIKE, Yosihiro TAKEUCHI, Hideyo SUZUKI, Tomiichi UETAKE
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VERIFICATION OF NON-LINEALITY OF SURFICIAL LAYER USING VERTICAL-ARRAY STRONG-MOTION DATA
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We examine the non-linearity of surficial layers using vertical-array data at four sites, comparing strong-motion and weak-motion spectral ratios ( surface /underground ). A numerical code for calculating time-domain responses of the non-linerity is used to examine an empirical initial loading curve derived from the laboratory measurements appropriate for our sites. We discuss factors owing mainly to the non-linearity such as peak accelerations, soil conditioans, and strain level.
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