Three-dimensional numerical simulation of seismic responses of single end bearing piles in inclined liquefiable site
WEN Yan;ZHOU Enquan;LU Jianfei;WANG Binghui;School of Civil Engineering and Mechanics, Jiangsu University;School of Civil Engineering and Architecture, Jiangsu University of Science and Technology;
The dynamic response of pile foundation in liquefiable inclined site is an important problem in geotechnical engineering field both at home and abroad. Based on the shaking table test, the liquefiable soil layer is regarded as non-Newtonian fluid and the three-dimensional numerical calculation of the pile-soil-structure interaction in inclined liquefiable site is carried out by using fluid-structure interaction method. The results are compared with the test, and the dynamic response characteristics of the end bearing single pile under the influence of slenderness ratio, the inertia force at the top of pile and the bottom embedment condition are analyzed. The results showed that the numerical calculation based on the fluid-structure interaction method was consistent with the results of the shaking table test, which could reproduce it; the dynamic response of pile foundation could be obviously affected by different slenderness ratio, additional mass block at the top of pile and whether the pile bottom was fixed or not. Site liquefaction had a significant role in the shock absorption, the seismic wave passed from the bottom non liquefaction layer to the liquefied layer, the acceleration attenuation in the liquefied soil was faster.