Modified Lade-Duncan Model Based on the Theory of Spatial Mobilized Plane
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Abstract:
he theory of spatial mobilized plane was used to improve the yield criterion and failure criterion of Lade-Duncan elastoplastic model, and then the modified Lade-Duncan model was established based on the non-associated flow rule. Model parameters can be determined by the traditional triaxial test. The adaptability to the modified Lade-Duncan model for silt was verified based on the triaxial UU test results of the silt samples collected in the deep foundation pit of the south-central plain area in Weifang. The modified model can better reflect the relationship between（σ1-σ3）and ε1 of supporting layer of silt, and the relativity and shear dilatancy properties of stress paths. The modified model can provide reference for the calculation of silt foundation deformation of the high-rise buildings and ultra-tall buildings.
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