Data analysis of shaking table test studying complex structure-pile-soil interaction

Based on the data analysis of the shaking table test studying complex structure-pile-soil interaction,this paper analyzes fully the earthquake responses of structures by using acceleration dynamic coefficient,maximum deformation,maximum normal strain and maximum dynamic soil pressure.It is found that the frequencies inducing the maximum earthquake responses in different parts of the structure are different.The responses are also influenced by the spectral characteristics of seismic ground motion and its vibration frequency.The earthquake responses are drastic when the Tianjin seismic ground motion is applied.The amplification of the seismic ground motiomn by soil-structure is big when the magnitude is small,while it reduces when the magnitude increases.The maximum deformation becomes bigger when the structure height increases,and it changes obviously at the interface between the pile and the underground structure and at the surface of soil.The maximum normal strain of the column of underground structure is big in the middle but is small at both ends.The maximum dynamic soil pressure is big at both ends but small in the middle,when the soil depth increases and the maximum dynamic soil pressure occurs at the soil surface.The total soil pressure is affected obviously by the maximum dynamic pressure.It decreases first and then increases when the depth increases.