MODEL FOR DYNAMIC SHEAR MODULUS AND DAMPING FOR GRANULAR SOILS

This paper presents a simple four-parameter model that can represent the shear modulus factors and damping coefficients for a granular soil subjected to horizontal shear stresses imposed by vertically propagating shear waves. The input parameters are functions of the confining pressure and density and have been derived from a generalized effective stress soil model referred to as MIT-S1. The predicted shear moduli and damping factors are in excellent agreement with high quality resonant column test data on remolded sands and confining pressures ranging from 30 kPa to 1.8 MPa. The proposed model has been implemented in a frequency domain computer code. By simulating the variations in stiffness and damping with confining pressure, the proposed model provides a more realistic simulation of ground amplification that does not filter out high frequency components of the base excitation.

  • Availability:
  • Supplemental Notes:
    • This research was supported in part by Grant GT-2 from the Mid America Earthquake Center under the sponsorship of the National Science Foundation, Washington, D.C.
  • Corporate Authors:

    American Society of Civil Engineers

    1801 Alexander Bell Drive
    Reston, VA  United States  20191-4400
  • Authors:
    • Assimaki, D
    • Kausel, E
    • Whittle, A
  • Publication Date: 2000-10

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00800579
  • Record Type: Publication
  • Contract Numbers: GT-2, CMS-9604684, 65V495
  • Files: TRIS
  • Created Date: Oct 11 2000 12:00AM