A Revised Pore-Water Pressure Buildup Model for Horizontal Site

摘要

Soil liquefaction has a strong influence on ground motion so that an effective analytical method of seismic response of liquefiable sites has to be established. The key of a liquefaction model is to simulate pore-water pressure process during liquefaction. The existing pore-water pressure models are mainly total quantitative models which can seldom simulate the process of liquefaction under irregular loadings. The pore-water pressure modes predicted by the incremental quantitative model which was obtained by regressing dynamic triaxial tests data are noticeably different from those of shaking table tests and centrifuge tests. A revised incremental pore-water pressure ratio model is proposed by modifying the pore-water pressure increasing modes proposed by Sun et al. The proposed model was testified by shaking table testing results under sinusoidal and irregular loadings. The results indicate that the revised model can better simulate the pore-water pressure buildup process under sinusoidal and seismic loading than the original model.