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Simplified Method of Flow Deformation Induced by Liquefied Sands
The liquefied sand was certified as shear thinning non-Newtonian fluid according to its liquefaction flow characteristics through the laboratory tests. The relationship between the shear stress and the shear strain rate could be expressed by a power function. The flow constitutive model of liquefied sand was proposed and second-developed in FLAC3D. The simplified numerical method in FLAC3D was obtained to calculate the flow deformation of sand which was induced by the liquefaction. There were two steps regarding the simplified method. Firstly, the elastic model was used to get the initial stress field including shear stresses. Secondly, the flow constitutive model replaced the elastic model to get the liquefaction deformation under shear stress conditions. The simplified method was used to analyze the liquefaction deformation of sands under the shaking table tests. Various influence factors were discussed such as the slope of liquefied soil layer, texture coefficient, flow index and elastic parameters. It was indicated that the texture coefficient and the flow index of the liquefied sand were the major factors controlling the deformation.
Simplified Method of Flow Deformation Induced by Liquefied Sands
The liquefied sand was certified as shear thinning non-Newtonian fluid according to its liquefaction flow characteristics through the laboratory tests. The relationship between the shear stress and the shear strain rate could be expressed by a power function. The flow constitutive model of liquefied sand was proposed and second-developed in FLAC3D. The simplified numerical method in FLAC3D was obtained to calculate the flow deformation of sand which was induced by the liquefaction. There were two steps regarding the simplified method. Firstly, the elastic model was used to get the initial stress field including shear stresses. Secondly, the flow constitutive model replaced the elastic model to get the liquefaction deformation under shear stress conditions. The simplified method was used to analyze the liquefaction deformation of sands under the shaking table tests. Various influence factors were discussed such as the slope of liquefied soil layer, texture coefficient, flow index and elastic parameters. It was indicated that the texture coefficient and the flow index of the liquefied sand were the major factors controlling the deformation.
Simplified Method of Flow Deformation Induced by Liquefied Sands
Chen, Yumin (author) / Liu, Hanlong (author)
GeoHunan International Conference 2011 ; 2011 ; Hunan, China
2011-05-16
Conference paper
Electronic Resource
English
Simplified Method of Flow Deformation Induced by Liquefied Sands
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