Centrifuge Model Test and Numerical Analysis on the Behavior of Embankment on Cohesive Ground from Construction to Post Earthquake
Centrifuge Model Test and Numerical Analysis on the Behavior of Embankment on Cohesive Ground from Construction to Post Earthquake
In past large earthquakes, ground settlement due earthquake has been observed in clayey soils. Settlement of clayey soils is long-term and may affect structures several years after the earthquake. Therefore, it is necessary to consider the seismic behavior of cohesive soils in seismic design. However, there are very few examples of long-term settlements measured before and after earthquakes, and it is necessary to clarify the mechanism of settlement of cohesive soils.
In this study, a centrifuge model test was conducted on an embankment mount on a composite ground composed of clay and sandy soil in order to obtain the fundamental data for elucidating the mechanism of post-seismic settlement of clayey soils. The centrifuge model experiment simulated a series of settlement processes during construction (static), earthquake, and post-earthquake. As a result, it was confirmed that the earthquake caused an increase in excess pore water pressure in the cohesive soil, which resulted in settlement. Furthermore, seismic response analysis using the effective stress method was conducted to confirm the consistency between the experiment and the analysis, and to identify issues in analysing the series of phenomena.
S. Sato; Sokkheang Sreng Suzuki; Masaki Sakemoto
4th Asia-Pacific Conference on Physical Modelling in Geotechnics (ACPMG2024)
Other
https://doi.org/10.53243/ACPMG2024-36
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