Shear modulus and material damping of municipal solid waste based on large-scale cyclic triaxial testing

Author:

Zekkos Dimitrios12,Bray Jonathan D.12,Riemer Michael F.12

Affiliation:

1. Geosyntec Consultants, 475 14th St. Suite 450, Oakland, CA 94612, USA.

2. Department of Civil and Environmental Engineering, University of California at Berkeley, CA 94720-1710 USA

Abstract

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.

Publisher

Canadian Science Publishing

Subject

Civil and Structural Engineering,Geotechnical Engineering and Engineering Geology

Reference10 articles.

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