Zekkos, D., Bray, J.D., and Riemer, M.F. (2008) “Shear Modulus and
Material Damping of Municipal Solid Waste Based on Large-Scale
Cyclic Triaxial Testing,”Canadian Geotechnical Journal, Vol. 45, No. 1,
2008, pp. 45-58.
Representative dynamic properties of Municipal Solid-Waste (MSW)
are required to perform reliable seismic analyses of MSW landfills. A
comprehensive large-scale cyclic triaxial laboratory testing program
was performed on MSW retrieved from a landfill in the San Francisco
Bay Area to evaluate the small-strain shear modulus, and
strain-dependent normalized shear modulus reduction and material
damping ratio relationships of MSW. The effects of waste
composition, confining stress, unit weight, time under confinement,
and loading frequency on these dynamic properties were evaluated.
The small-strain shear modulus depends primarily on waste
composition, confining stress, unit weight, and time under
confinement. The normalized shear modulus reduction and material
damping curves for MSW depend on waste composition and confining
stress. Based on the results of this study and a review of literature,
strain-dependent shear modulus reduction and material damping
relationships are recommended for use in landfill design.
|SHEAR MODULUS AND MATERIAL
DAMPING OF MUNICIPAL SOLID-WASTE
BASED ON LARGE-SCALE CYCLIC TRIAXIAL