Centrifuge modeling of the effects of earthquake amplitude on ground liquefaction and embankment response
Centrifuge modeling of the effects of earthquake amplitude on ground liquefaction and embankment response
The objective of this study is to highlight the behavior of embankments constructed on liquefiable soil and subjected to earthquakes with different amplitudes. Two centrifuge models were performed to reproduce an embankment constructed on liquefiable soil subjected to dynamic excitation. The centrifuge models were prepared with clean sand (Hostun HN31) and instrumented (accelerometers, pressure sensors, and lasers). These models are excited with sinusoidal signals with different amplitudes: 0.1g and 0.2g. The impact of the amplitude on soil liquefaction was first examined by comparing the accelerations and pore pressures recorded during the tests. Different aspects were considered, including the location and extent of the liquefied zones, as well as the time required to initiate liquefaction. Additionally, the behavior of the embankment was investigated. The influence of the applied signal's amplitude on the model's deformation was also evaluated particularly focusing on vertical displacements such as embankment settlements and the uplift of the free ground surface.
Chedid Saade; Zheng Li; Sandra Escoffier; Luc Thorel
5th European Conference on Physical Modelling in Geotechnics (ECPMG2024)
Geotechnical infrastructure
https://doi.org/10.53243/ECPMG2024-44
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