ON-SITE NONLINEAR HYSTERESIS CURVES AND DYNAMIC SOIL PROPERTIES
Strong motion records at five vertical array sites in Japan are used to examine soil shear modulus and material damping as a function of shear strain during large earthquakes. Acceleration data from the sites are processed directly for evaluation of site shear stress-strain hysteresis curves for different time windows of the record. Results of the analysis demonstrate a significant nonlinear ground response at the sites with surface peak ground accelerations exceeding 90 gal. The results of shear stress-strain hysteresis curves are also used to estimate variation of soil shear modulus and material damping characteristics with shear strain amplitude at each site. The identified shear modulus-shear strain and damping ratio-shear strain relationships are in general agreement with published laboratory results. These response interpretations are also compared with the results of a frequency-domain analysis by using the spectral ratio technique. There is general agreement between the time- and frequency-domain results. The results illustrate the significance of the site nonlinearity during strong ground motions as well as the accuracy of the dynamic soil properties obtained from laboratory tests.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Ghayamghamian, M R
- Kawakami, H
- Publication Date: 2000-6
Language
- English
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: p. 543-555
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Serial:
- Journal of Geotechnical and Geoenvironmental Engineering
- Volume: 126
- Issue Number: 6
- Publisher: American Society of Civil Engineers
- ISSN: 1090-0241
- Serial URL: http://ojps.aip.org/gto
Subject/Index Terms
- TRT Terms: Damping (Physics); Deformation curve; Earthquakes; Hysteresis; Laboratory tests; Resistance (Mechanics); Seismicity; Shear modulus; Shear strain; Soils; Spectrum analysis; Time domain analysis
- Geographic Terms: Japan
- Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;
Filing Info
- Accession Number: 00798318
- Record Type: Publication
- Contract Numbers: NAS8-38779, MSM 8858001
- Files: TRIS
- Created Date: Aug 31 2000 12:00AM