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- W4254421851 abstract "Journal of Earthquake EngineeringVol. 09, No. 02, pp. 247-264 (2005) No AccessSEGMENTAL CROSS-SPECTRUM AS A NEW TECHNIQUE IN SITE RESPONSE ESTIMATION USING SPECTRAL RATIO ANALYSISM. REZA GHAYAMGHAMIANM. REZA GHAYAMGHAMIANDepartment of Geotechnical Earthquake Engineering, International Institute of Earthquake Engineering and Seismology (IIEES) P.O. Box 19395-3913, Tehran, IranFax: (+9821) 2299479. Search for more papers by this author Cited by:0 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail AbstractDifferent aspects of spectral analysis for site response evaluation are investigated in this study. The segmental cross-spectrum is proposed in spectral analysis of earthquake ground motions. The performance of segmental cross-spectrum in contrast with the conventional methods is investigated through the mathematical modelling, numerical analysis and application to earthquake data recorded at Chiba and Shinfuji downhole arrays in Japan. In analysis of earthquake data, the soil amplification function is identified using both uphole/downhole (U/D) and H/V spectral ratios. The advantage of segmental cross-spectrum is assessed by comparing identified amplification functions using different spectral methods and theoretical soil response. The reliability of site response estimations obtained by H/V spectral ratio using segmental cross- and Fourier spectra is also examined by means of cross-validation with the U/D spectral ratio of earthquake motion and theoretical soil response. Furthermore, the application of segmental cross-spectrum in nonlinear soil response is examined by comparing the amplification function of weak and strong motions for both methods. The results validate the advantage of segmental cross-spectrum in both linear and nonlinear soil response, particularly, when it used with H/V technique.Keywords:Site effectsspectral ratiosegmental cross-spectrumH/V techniquenonlinear site responsedownhole array References J. S. Bendat and A. G. Piersol , Random Data: Analysis and Measurement Procedures ( John Wiley and Sons , New York , 1971 ) . Google Scholar J. S. Bendat and A. G. Piersol , Engineering Application of Correlation and Spectral Analysis ( John Wiley and Sons , New York , 1993 ) . Google Scholar Database Advisory Committee and Working Sub-Committee [1993] Strong motion array record database, Report No. 1, Association for Earthquake Disaster Prevention . Google ScholarE. H. Field, K. H. Jacob and S. E. Hough, Bull. Seis. Soc. Am. 88, 2283 (1992). Google ScholarE. H. Field, Earth. Spectra 10(2), 451 (1994). Crossref, Google Scholar Ghayamghamian, M. R. [1997] Nonlinear and linear response of the site with evaluation of actual dynamic soil properties using vertical array accelerograms and microtremors, PhD dissertation, Saitama University, Japan . Google ScholarM. R. Ghayamghamian and H. Kawakami, ASCE, Geotechnical and Geoenvironmental Eng. 12/6, 543 (2000). Google Scholar Katayama, T., Yamazaki, F., Nagata, S., Lu, L. and Turker, T. [1990] Development of strong motion data base for the Chiba seismometer array, Report No. 90-1(14), University of Tokyo . Google Scholar Nakamura, Y. [1989] A method for dynamic characteristics estimation of subsurface using microtremor on the ground surface, QR RTRI 30, pp. 25–33 . Google ScholarE. Safak, Problems with using spectral ratios to estimate site amplification, Proc. of 1st Int. Conf. on Seis. Zonation pp. 277–283. Google ScholarH. J. Steidl, Earth. Spectra 9(2), 289 (1993). Crossref, Google ScholarN. P. Theodulidis and P. Y. Bard, Soil Dyn. and Earth. Eng. 14, 177 (1995). Crossref, Google ScholarS. Tsuboi, M. Saito and Y. Ishihara, Bull. Seis. Soc. Am. 91(3), 499 (2001). Crossref, Google ScholarF. Yamazaki and M. A. Ansary, Earth. Eng. and Struct. Dyn. 26, 671 (1997). Crossref, Google ScholarF. Yamazaki, L. Lu and T. Katayama, Orientation error estimation of seismometers in array observation, Civil Engineering Symposium No. 32 pp. 231–240. Google Scholar AnnouncementWorld Scientific has ceased to distribute JEE with effect from 2007. Articles from its back issues can be purchased through our Pay-Per-View service. FiguresReferencesRelatedDetails Recommended Vol. 09, No. 02 Metrics History Received 13 July 2003 Revised 28 July 2004 Accepted 20 August 2004 KeywordsSite effectsspectral ratiosegmental cross-spectrumH/V techniquenonlinear site responsedownhole arrayPDF download" @default.
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