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Seismic response of solid waste landfills

Maravelaki Chrysi

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URI: http://purl.tuc.gr/dl/dias/35E1D763-83AA-4FC6-A217-17F77C615FE9
Year 2018
Type of Item Master Thesis
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Summary

The topic of the present thesis is the study of the main factors that influence the response of solid waste landfills under seismic loading. For this purpose, a series of seismic response analyses has been performed utilizing finite element software QUAD4M, which was developed in Fortran programming language and can be used for the solution of two-dimensional problems in geotechnical earthquake engineering. The main aim of this study is to present a realistic numerical simulation of the dynamic non-linear response of solid waste landfills taking into account the variation of mechanical properties of waste material. Firstly, an introduction to general concepts regarding design and construction of municipal waste landfills is given. Furthermore, the key factors that affect the stability of landfills are provided, such as the dynamic properties of municipal waste, unit weight, compaction, etc. Examples of landfill failures are also presented. Moreover, a brief description of analysis methods, with emphasis on finite element based numerical approaches is included, in which the basic functions and capabilities of QUAD4M software are presented. Subsequently, the computational procedure that has been implemented in this study for the examined typical landfill simulations is provided. Discussions of the derived results are presented, which highlight the wide discrepancy of the waste input data, which is also reflected in the results that strongly depend on the characteristics of the waste material as well as the frequency content and the intensity of the excitation. The thesis concludes by summarizing the findings of the study and presenting the conclusions obtained.

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