[1]李雨润,徐栋梁,张雨雷,等.饱和砂土中两桩承台群桩横向动力响应规律研究[J].地震工程与工程振动,2020,40(03):043-53.[doi:10.13197/j.eeev.2020.03.43.liyr.005]
 LI Yurun,XU Dongliang,ZHANG Yulei,et al.Research on lateral dynamic response law of double pile-cap clump of piles in saturated sandy soil[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2020,40(03):043-53.[doi:10.13197/j.eeev.2020.03.43.liyr.005]
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饱和砂土中两桩承台群桩横向动力响应规律研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
40
期数:
2020年03
页码:
043-53
栏目:
论文
出版日期:
2020-06-30

文章信息/Info

Title:
Research on lateral dynamic response law of double pile-cap clump of piles in saturated sandy soil
作者:
李雨润1 徐栋梁1 张雨雷1 梅申勇3
1. 河北工业大学 土木与交通学院, 天津 300401;
2. 河北省土木工程技术研究中心, 天津 300401;
3. 舒城县重点工程建设管理处, 安徽 舒城 231300
Author(s):
LI Yurun1 XU Dongliang1 ZHANG Yulei1 MEI Shenyong3
1. College of Civil Engineering and Transportation, Hebei University of Technology, Tianjin, 300401, China;
2. Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China;
3. Shucheng County Key Engineering Construction Management Office, Shucheng 231300, China
关键词:
两桩承台群桩饱和砂土OpenSees软件数值模拟横向动力响应
Keywords:
double pile-cap clump of pilessaturated sandOpenSeesnumerical simulationlateral dynamic response
分类号:
TU4
DOI:
10.13197/j.eeev.2020.03.43.liyr.005
摘要:
两桩承台群桩结构在桥梁和水利工程中应用较多,在饱和砂土中两桩承台直群桩和斜群桩的动力响应规律是值得深入研究的课题。本文基于两直桩和两斜桩承台结构振动台试验,将典型试验结果与OpenSees有限元软件建立的三维数值模型计算结果进行对比研究,验证模型的准确性;在此基础上,采用本文所建立的三维数值模型,开展不同频率正弦波输入下的两桩承台群桩横向动力响应规律研究,并将数值分析结果与已有试验结果进行对比分析。结果表明:两桩承台群桩的试验和模拟的加速度时程曲线、位移时程曲线、孔压变化规律和峰值大小基本吻合;在饱和砂土中相同工况下两桩承台直群桩的放大效应要明显高于两桩承台斜群桩,承台的放大值比较明显;不同频率正弦波下液化砂土的两桩承台群桩在台面位置的加速度峰值和位移峰值相差不大,放大倍数随着频率的升高有一定程度的增长;在饱和砂土中不同频率正弦波输入下两桩承台斜群桩表现出一定的优势。研究成果为饱和砂土中桩基抗震设计提供一定的理论参考。
Abstract:
Double pile-cap clump of piles structure is widely used in bridge and hydraulic engineering, research on lateral dynamic response law of symmetrically double piles in saturated sandy soil is a subject worthy of further study. Based on the electromagnetic shaking table test of symmetrical double-inclined pile and symmetrical double-straight pile, using the finite element software OpenSees to develop the numerical model to conduct numerical simulation research on the lateral dynamic response of symmetrical double-inclined pile, and the numerical results are compared with experimental results,Based on the three-dimensional numerical model, the lateral dynamic response characteristics of the symmetrical double piles are numerically simulated with the sinusoidal wave of different frequencies. The results show that: comparison results show that under the sine wave input, the acceleration, displacement and pore pressure time history curve of the symmetrical double piles are basically in agreement with those from numerical simulation; the amplification effect of symmetrical double straight pile is obviously higher than that of symmetrical double inclined pile under the same working condition in saturated soil; there is no significant difference between the peak acceleration and peak displacement of the symmetrical double pile with sinusoidal waves of different frequencies, the amplification increases with the increase of sinusoidal waves; the symmetrical double inclined piles show the advantages under different frequency sinusoidal wave input in saturated sand soil. The research results provide a theoretical reference for the seismic design of pile foundation in saturated sand.

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备注/Memo

备注/Memo:
收稿日期:2019-09-23;改回日期:2020-01-10。
基金项目:国家自然科学基金项目(51778207);河北省自然科学基金项目(E2018202107)
作者简介:李雨润(1978-),男,教授、博士,主要从事土动力学与桩基抗震方面的研究.E-mail:iemlyr7888@hebut.edu.cn
通讯作者:徐栋梁(1995-),男,硕士研究生,主要从事桩基动力响应研究.E-mail:xdl054264@163.com
更新日期/Last Update: 1900-01-01