Experimental study on load amplitude impact on dynamic response of XCC pile-raft composite foundation

被引：0

作者：

Sun G. ^{[1
]}

Kong G. ^{[1
]}

Liu H. ^{[2
]}

Chu J. ^{[3
]}

机构：

[1] Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, China Three Gorges University, Yichang

[2] College of Civil Engineering, Chongqing University, Chongqing

[3] School of Civil and Environmental Engineering, Nanyang Technology University, Singapore

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Amplitude; Dynamic load; Model test; Pile-raft composite foundation; XCC pile;

D O I：

10.11817/j.issn.1672-7207.2020.02.023

中图分类号：

学科分类号：

摘要：

Based on large scale model test method, experimental study on dynamic response of cast-in-situ X-shaped concrete (referred as XCC) pile-raft composite foundation embedded in sand was carried out. The sine wave load was used, and the amplitude of cyclic loads was changed. The velocity response of raft, dynamic stress response of pile, dynamic soil pressure response of XCC pile-raft composite foundation under cycle loads were measured. The dynamic response mechanism of the XCC pile-raft composite foundation was discussed. The results show that the vibration velocity of pile-raft composite foundation gradually decreases and the dynamic stress response of pile decreases approximately in a ware shape with the depth. The velocity response, dynamic stress response of pile top, and the dynamic soil pressure response nearly linearly increase with the increase of load amplitude. Gravel cushion layer has a good damping effect. © 2020, Central South University Press. All right reserved.

引用

页码：499 / 506

页数：7

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