Seismic Response and Failure Mode Analysis of Pile-structure System in Non-liquefiable Site

被引：0

作者：

Dou P.-F. ^{[1
,2
]}

Liu H. ^{[2
]}

Xu C.-S. ^{[2
]}

Wang J.-T. ^{[1
]}

Sun Y.-L. ^{[2
]}

Du X.-L. ^{[2
]}

机构：

[1] Department of Hydraulic Engineering, Tsinghua University, Beijing

[2] Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing

来源：

Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2022年 / 35卷 / 11期

基金：

中国国家自然科学基金;

关键词：

bridge engineering; dynamic response; failure mode of piles foundation; non-liquefiable site; numerical simulation; shaking table test;

D O I：

10.19721/j.cnki.1001-7372.2022.11.005

中图分类号：

学科分类号：

摘要：

Based on large-scale shaking table test of non-liquefiable site-pile group foundation-superstructure, a numerical model on seismic response of non-liquefiable site-pile-structure system was established. Based on analyzing the dynamic response of pile-structure system, the failure mode of pile foundation in non-liquefiable site under dynamic load is discussed. By comparing the typical seismic response results obtained by the numerical calculation model and the experimental results, the validity and rationality of the numerical calculation model was verified and the seismic response law of soil-structure system in non-liquefiable site was further discussed and the failure process of pile foundation and the seismic failure mode of pile-structure system under earthquake load are emphasized. The results shown that the peak acceleration of soil is no longer amplified in the loose sand layer, and a certain amplification appeared at the top, and the acceleration response of pile foundation also has a similar law. The dynamic shear stress-dynamic shear strain hysteresis curves of soil at each depth also slightly decrease in the slope under earthquake load, and the equivalent shear modules also decreased to varying degrees, indicating that the shear strength of soil at all. The maximum bending moment appeared in the middle and lower parts of the pile shaft, and the shearing force of the pile shaft at the pile head and the interface between soil layers were large, indicating that shear failure of pile head or bending failure of pile body may occur. © 2022 Xi'an Highway University. All rights reserved.

引用

页码：39 / 51

页数：12

共 26 条

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