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.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
• 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
• 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