ANALYSIS OF SEISMIC PERFORMANCE OF RIGID PILE COMPOSITE FOUNDATION

Using finite element software ANSYS,we analyzed the 3D dynamic characteristics of 5 ×5 pile composite foundation,wherein the calculation and analysis was carried out by assuming that the cushion layer, the soil among piles,the piles and the foundation of the model had linear elasticity and considering the feedback effect of the upper structure.Through analysis,we obtained the self-vibration property of the structure,and carried out the seismic response analysis of the rigid pile composite foundation by response spectrum method to obtain the structure displacement,the internal force and the distribution rule of the upper structure-foundation-composite foundation.