COUPLED HYDRAULIC-MECHANICAL ANALYSIS OF LARGE DEFORMATION INDUCED BY POST-LIQUEFIED SAND
Under the influence of a vibrating load, the pore pressure of a liquid increases and the effective stress of a soil skeleton decreases. Liquefaction occurs when the effective stress equals to zero. According to the characteristics of the post-liquefaction deformation, determined using hollow torsion-shear tests, the liquefied sand is a shear thinning non-Newtonian fluid (pseudo-plastic fluid). With the pore pressure decreasing and the effective stress increasing, the relationship between the logarithm of apparent viscosity and the pore pressure ratio can be fitted by a logarithmic function. Based on the test results, the fluid constitutive models of liquefied and post-liquefied sand are established by introducing fluid mechanics. Regarding liquefied and post-liquefied sand as fluid, a new dynamic constitutive model, termed PL-Finn Model (Post Liquefaction Finn Model) is compiled in FLAC3D. Single zone tests and the complicated torsional shear test simulations are performed to verify the new model.
Yumin Chen Hanlong Liu
Geotechnical Research Institute, Hohai University, Nanjing, China
国际会议
南京
英文
370-375
2006-05-22（万方平台首次上网日期，不代表论文的发表时间）