Prediction of the Stress-Strain Behavior of MSW Materials Using Hyperbolic Model and Evolutionary Polynomial Regression (EPR)

Document Type : Research Article

Authors

1 Assistant professor, Faculty of Civil Engineering, Shahrood University of technology

2 M.Sc. Student, Faculty of civil engineering, Shahrood university of technology

3 M.Sc. Student, Faculty of civil Engineering, Shahrood University of Technology

Abstract

In recent years, the rupture of landfill centers has resulted in the importance of studying the behavior of municipal solid waste (MSW). MSW as the main constituent element in landfills has a complicated performance. In this study, by using the results of large–scale direct shear experiments with dimensions of 300 mm*300 mm*150 mm, 2 models to predict the behavior of MSW with ages of fresh and 3 months were presented. The purpose of this investigation was prediction of MSW stress-strain behavior for kahrizak landfill as a sample of developing countries landfills under aging and by structural models. These models were Hyperbolic model and Evolutionary Polynomial Regression (EPR). In these collection of experiments, aging process up to 3 months was artificially applied to samples. Three normal stresses 20, 50 and 100 kpa along with three shear displacement rates of 0.8, 8 and 19 mm/min were used for samples with different ages. The results of these two models showed high accordance with experimental results by direct shear apparatus, in addition to predict MSW behavior under aging and degradation. Finally, this study stated the advantage of EPR model relative to Hyperbolic model in higher accuracy for all experiments.

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References

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Amirkabir Journal of Civil Engineering
Volume 51, Issue 4
November and December 2019
Pages 793-804

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