Experimental understanding of some properties of reliquefaction and numerical reproduce of it based on skeleton structure concept

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The following results were obtained by means of systematic triaxial shear tests and hollow cylindrical torsional shear tests. (1) Continuous and orderly changes in anisotropy are repeated with dizzying rapidity during liquefaction. (2) The higher the level of developed anisotropy at the end of liquefaction, the lower the reliquefaction resistance. (3) The sands that have round shape are easy to liquefy because their anisotropy is easy to develop. Based on experimental results, qualitative description of cyclic mobility succeeded by means of adaptation of hyper elastic constitutive model to SYS Cam-clay model and giving a new evolution low of overconsolidation that depends on mean effective stress.