Study on the behavior of large ground displacement of sand due to seismic liquefaction

The laboratory tests on the post liquefaction deformation of sand are performed by a new vibration torsional triaxial apparatus, and a constitutive model on the post liquefaction behavior of sand is established with a hyperbolic model. The parameters of model are calibrated. It is found that the hyperbolic model can express the post liquefaction stress strain response very well by comparison to the previously published test results.