Experimental Study of Soil Amplification and Soil-Pile-Structure Interaction Performing Shake Table Test

In the present study, the shake table tests were performed to investigate the amplification behaviour of cohesion-less soil column. The soil columns were subjected to dynamic load of sinusoidal base excitation with varying the frequencies and amplitudes. In the experimental setup, a scale-down model was designed consisting of four aluminium piles with pile cap, embedded in the soil sample. Three accelerometers were placed in different depths inside the soil column and one was placed at pile cap. It was observed that the acceleration responses of soil got amplified in upward direction in the soil column. The response of acceleration at pile cap level also got amplified in comparison with the base excitation due to soil-pile-structure interactions. However, it is observed that the amplification of acceleration responses depends upon the frequencies and amplitude of the base excitations. Additionally, in order to observe the amplification characteristics of soils, the simulation study using DEEPSOIL software tool for a selected site with an analogous case study was performed.