Issue 65

A. Namdar et alii, Frattura ed Integrità Strutturale, 65 (2023) 112-134; DOI: 10.3221/IGF-ESIS.65.09

By comparing the stress-strain curve, it was possible to determine the reduction of stiffness in model 2. The shear and compressive strain in model 1 at node 4 are larger than in model 2 at the same point. In the loading and reloading stages of models 1 and 2, at embankment and subsoil, stress-strain characteristics follow two different patterns. In both models, the stress-strain rate is higher in the subsoil than in the embankment. The nature of MSW-clay landfill cover interaction causes the development of distinct seismic responses and seismic differential displacement for each model. In addition, the numerical simulation results revealed that the model's vibration mechanism is associated with the mechanical properties and material design of landfill construction. Due to the characteristics of MSW, two surfaces of cracks interact with each other, which affects displacement and deformation in the landfill.

Figure 8: The multidirectional nonlinear acceleration (g) – displacement (mm) in Y direction for the selected node.

Figure 9: The displacement (mm) after 1 second of applied acceleration (g).

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