Horizontal Dynamic Response of Pile Group Foundation in Liquefied Soil Under Vertical Load

被引：0

作者：

Hu, Anfeng ^{[1
,2
]}

Chen, Yiyangui ^{[1
,2
]}

Xiao, Zhirong ^{[3
]}

Chen, Zheng ^{[4
]}

机构：

[1] Research Center of Coastal and Urban Geotechnical Engineering, Zhcjiang University, Hangzhou,310058, China

[2] Engineering Research Center of Urban Underground Space Development of Zhejiang Province, Zhejiang University, Hangzhou,310058, China

[3] School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou,310023, China

[4] Zhejiang Province Institute of Architectural Design and Research, Hangzhou,310006, China

来源：

Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | / 58卷 / 07期

关键词：

The horizontal vibration model of partially buried pile group under vertical load is established based on Biot saturated porous media theory; considering the flow characteristics of liquefied soil. Considering the pile-soil coupling and continuous displacement conditions; the pile interaction factor solutions and the horizontal dynamic pile impedance solutions in liquefied soil under complex conditions are obtained using the variable separation method and the operator decomposition method. Parameter studies arc conducted on liquefied soil characteristics and vertical loadings. The results show that at the same vibration frequency; the horizontal dynamic stiffness of pile group decreases with the increase of surface liquefied soil thickness. When the liquefaction thickness is large; the dynamic stiffness decreases significantly with the increase of frequency; and a negative stiffness appears. Vertical pile top loading can reduce the dynamic stiffness of pile group in liquefaction soils. The weakening effect becomes more obvious with the increase in the thickness of liquefied soil. © 2024 Shanghai Jiaotong University. All rights reserved;

D O I：

10.16183/j.cnki.jsjtu.2023.007

中图分类号：

学科分类号：

摘要：

引用

页码：1075 / 1085

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