Constitutive Model for Strength Characteristics of Municipal Solid Waste
Publication: International Journal of Geomechanics
Volume 15, Issue 2
Abstract
This paper presents modification of the derivation of a previously proposed constitutive model for the prediction of stress-strain behavior of municipal solid waste (MSW) incorporating different mechanisms, such as immediate compression under loading, mechanical creep, and time-dependent biodegradation effect. The model is based on critical state soil mechanics incorporating increments in volumetric strains because of elastic, plastic, creep, and biodegradation effects. The improvement introduced in this paper is the modified critical state surface and considers five variable parameters for the estimation of stress-strain behavior of MSW under different loading conditions. In addition, an expression for the strain hardening rule is derived, with considerations of time-dependent mechanical creep and biodegradation effects. The model is validated using results from experimental studies and data from published literature. The results are also compared with the predictions of the stress-strain response obtained from a well-established hyperbolic model.
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Acknowledgments
The authors thank the reviewers for the critical review of the paper, which was very useful. The work presented in this paper is a part of the research in the project “Evaluation of Municipal Solid Waste (MSW) characteristics of a typical landfill in Bangalore” funded by the Center for infrastructure, Sustainable Transportation and Urban Planning (CiSTUP), Indian Institute of Science, Bangalore. The financial support of the CiSTUP is gratefully acknowledged.
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Information & Authors
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Published In
International Journal of Geomechanics
Volume 15 • Issue 2 • April 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Aug 25, 2012
Accepted: Aug 14, 2013
Published online: Aug 19, 2013
Published in print: Apr 1, 2015
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