EFFECT OF DEGRADATION ON SEISMIC RESPONSE OF ISRAELI CONTINENTAL SLOPE

Constitutive models of soil behavior under cyclic loading that incorporate Masing rules are often used to perform seismic site response analyses. These analyses often ignore the effect of cyclic degradation of stiffness and strength on the seismic response of horizontal, soft clay strata. The authors recently proposed a normalized form of the shear stress-strain relationship for undrained, cyclic simple shear of soft clay. Cyclic degradation is considered via a single fatigue parameter--the mean effective stress--used in normalization of stresses and strains. Cyclic degradation of the small strain shear modulus, though, is neglected. The normalized model is combined with an effective stress model for simple shear loading and boundary conditions, developed within the framework of bounding surface kinematic and isotropic hardening plasticity, to produce a model that is suitable for site response analysis. This paper demonstrates the use of this model in one-dimensional propagation analysis to compare the expected response in a soft clay profile to that response that would be estimated without accounting for cyclic degradation. By neglecting cyclic degradation, underestimation of velocities and accelerations developed in the profile are apparent.

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

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Puzrin, A
  • FRYDMAN, S
  • Talesnick, M
• Publication Date: 1997-2

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 85-93
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 123
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Boundary value problems; Deformation curve; Effective stress; Mathematical models; Repeated loads; Seismicity; Shear modulus; Soft clays; Soil mechanics; Stiffness; Strength of materials
• Uncontrolled Terms: Boundary conditions; Degradation; Models; Seismic response
• Old TRIS Terms: Soil behavior
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00735014
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 9 1997 12:00AM