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- W2322982018 abstract "Soil liquefaction is one of the most common geohazards that causes tremendous damage during earthquakes. It has been tacitly assumed that liquefaction only occurs in saturated sands and low plasticity silts. However, recent laboratory studies have revealed that the intergranular stress can reach very low levels in unsaturated sands with high, even moderate initial degree of saturation during cyclic loading. Unsaturated sands and sandy silts are present within many compacted embankments in earthquake prone areas and understanding the liquefaction behavior of these soils is of great practical importance. This paper firstly presents a constitutive model for unsaturated sands and sandy silts. The model introduced in this study simulates hysteresis in soil water characteristic curves (SWCCs), coupling mechanisms between SWCCs and the stressstrain behavior of the solid skeleton, and the hysteresis in the stress-strain response of the solid skeleton. Then, Toyoura sand is used to calibrate the model parameters and validate the model performance. A parametric study is finally conducted to study the combined effects of initial state, i.e. degree of saturation, relative density and stress state on liquefaction during cyclic loading. The current theoretical study confirms the possibility of liquefaction of unsaturated sands and sandy silts under cyclic loading. Potential methods for liquefaction mitigation of unsaturated sands and sandy silts are also presented." @default.
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- W2322982018 date "2012-03-29" @default.
- W2322982018 modified "2023-09-26" @default.
- W2322982018 title "Numerical Study on Effects of Initial State on Liquefaction of Unsaturated Soils" @default.
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- W2322982018 doi "https://doi.org/10.1061/9780784412121.249" @default.
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