Evaluation of Shear Modulus and Damping in Dynamic Centrifuge Tests

Correct evaluation of shear modulus and damping characteristics in soils under dynamic loading is key to both the fundamental understanding of soil behavior and the practical application of soil modeling programs. Dynamic centrifuge tests can contribute significant information about soil behavior, but great care must be taken over the signal processing techniques involved, and the test conditions are different from the laboratory experiments that form the database of existing knowledge. This paper outlines several factors that require careful consideration when deriving stiffness and damping parameters from centrifuge data. Shear modulus and damping degradation curves for a dry sand, saturated sand, soft clay and a model waste are then evaluated to explore some of the factors that are introduced during centrifuge tests. Stiffness is seen to be a more reliable parameter than damping ratio. Damping during centrifuge tests for certain materials appeared to differ from the expected values.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
• Authors:
  • Brennan, A J
  • Thusyanthan, N I
  • Madabhushi, S P G
• Publication Date: 2005-12

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 1488-1497
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 131
  • Issue Number: 12
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Centrifuges; Clay soils; Damping (Physics); Dynamic loads; Laboratory tests; Mathematical models; Sandy soils; Shear modulus; Soils; Stiffness
• Uncontrolled Terms: Degradation; Soil models
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01018764
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 13 2006 11:52AM