Analysis on kinematic and inertial interaction in liquefiable soil-pile-structure dynamic system  

作　　者：Xu Chengshun Liu Hao Dou Pengfei Wang Jinting Chen Su Du Xiuli 

机构地区：[1]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China [2]Department of Hydraulic Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Earthquake Engineering and Engineering Vibration》2023年第3期601-612,共12页地震工程与工程振动（英文刊）

基　　金：Foundation for Innovative Research Groups of the National Natural Science Foundation of China under Grant No.51421005;National Natural Science Foundation of China under Grant No.51578026;National Outstanding Youth Science Fund Project of National Natural Science Foundation of China under Grant No.51722801。

摘　　要：The dynamic pile-soil interaction in a liquefied site was investigated by means of numerical simulation and shaking table tests in this study.Based on the results from the shaking table experiment,the cross-correlation analysis of the soil displacement-pile bending moment and superstructure acceleration-pile bending moment was performed to study the influence of kinematic interaction and inertial interaction on the seismic response of piles.A relatively reasonable and accurate finite difference numerical analysis model of liquefiable soil-pile group-superstructure dynamic system was established.Through numerical simulation,the understanding of kinematic interaction and inertial interaction in the shaking table test was verified.The mass,damping and period of the superstructure were selected as variables to carry out parameter analysis to further study the influence of inertial interaction on the pile-structure failure mechanism.The results show that the influence of kinematic interaction on the pile was much greater than that of inertial interaction.The mass of the superstructure was the most important parameter of inertial interaction,and dynamic characteristics of the superstructure also had an effect on inertial interaction.The effect of inertial interaction on the part near the pile tip was more significant,indicating that the failure near the pile tip is closely related to inertial interaction.

关 键 词：shaking table experiments pile-supported structures dynamic response LIQUEFACTION lateral constraint INSTABILITY 

分 类 号：TU435[建筑科学—岩土工程] TU473.1[建筑科学—土工工程]