Shaking Table Tests on Model Pile in Liquefiable Ground

Shaking Table Tests on Model Pile in Liquefiable Ground

For the study of the soil-structure interaction in liquefiable ground under one-and two-dimensional shakings, shaking table tests on a model pile in the large biaxial laminar shear box filled with clean sand were conducted at the National Center for Research on Earthquake Engineering, Taiwan. The model pile made of aluminum alloy was used in the shaking table tests. The pile tip was fixed at the bottom of the shear box to simulate the condition of a pile foundation embedded in a firm stratum. The pile head was mounted with various numbers of steel disks. The input shakings included sinusoidal and recorded earthquake accelerations. Strain gauges and accelerometers were placed on the pile surface to obtain the bending strains and accelerations of the pile under shaking. The responses of the model pile and the soil-pile interactions under shakings for liquefied and non-liquefied soil conditions were evaluated according to the measured data. The behavior of the pile foundation was affected by the relation among the dynamic characteristics of the pile and the surrounding soil, and the mass on the pile head.