冲刷作用下层状横观各向同性土中群桩水平振动响应

艾智勇; 李志雄

doi:10.11779/CJGE201604004

冲刷作用下层状横观各向同性土中群桩水平振动响应 English Version

艾智勇^1,2,
李志雄^1,2

1.同济大学地下建筑与工程系，上海200092;
2.同济大学岩土及地下工程教育部重点实验室，上海200092

详细信息

作者简介:
艾智勇(1966- ),男,江西余江人,博士,教授,主要从事岩土及地下工程方面的教学和研究工作。E-mail: zhiyongai@tongji.edu.cn。

中图分类号: TU473
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- 文章访问数: 452
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出版历程
- 修回日期: 2015-03-11
- 发布日期: 2016-04-24

Horizontal vibration of a pile group in transversely isotropic layered soils under scour conditions

AI Zhi-yong^1,2,
LI Zhi-xiong^1,2

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

摘要

摘要: 采用有限元（FEM）与间接边界元（BEM）耦合法,求解冲刷作用下层状横观各向同性地基中高承台群桩的水平振动响应。采用三节点梁单元对群桩进行离散; 然后,基于层状横观地基频域内的解答,以及考虑桩-桩相互作用,建立了地基积分方程; 再通过对积分方程离散和数值求解,得到地基的柔度矩阵; 根据桩土之间的协调条件,推导出群桩与地基共同作用的方程; 通过引入各基桩桩顶的边界条件,获得共同作用方程的解答。最后,通过相关数值算例,验证本文理论及结果的正确性,并讨论冲刷深度对群桩水平振动响应的影响。
- 层状横观各向同性土 /
- 群桩 /
- 水平振动响应 /
- 冲刷 /
- FEM-BEM耦合法
Abstract: The finite element and indirect boundary element coupling method is proposed to solve the horizontal vibration of a pile group in transversely isotropic layered soils under scour conditions. The pile group is discretized by a three-node beam element. And then, based on the dynamic solution for transversely isotropic layered soils in frequency domain and considering the pile-pile interactions, the integral equation for the soil is established. After the integral equation is discretized and evaluated numerically, the flexibility matrix of the soil is obtained. The equation for the interaction between the pile group and the soil is deduced using the compatibility conditions between the pile and the soil. After introducing the boundary conditions of the pile head, the solutions for the interaction equation are obtained. Finally, numerical examples are used to validate the proposed theory and results, and to investigate the influence of the scour depth on the horizontal vibration response of the pile group.
- transversely isotropic layered soil /
- pile group /
- horizontal vibration /
- scour /
- FEM-BEM coupling method

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参考文献(9)

[1]	SUMER B M, FREDSØE J, CHRISTIANSEN N. Scour around a vertical pile in waves[J]. Journal of Waterway, Port, Coastal and Ocean Engineering, 1992, 118(1): 15-31.
[2]	AVENT R R, ALAWADY M. Bridge scour and substructure deterioration: case study[J]. Journal of Bridge Engineering, 2005, 10(3): 247-254.
[3]	LIN C, BENNETT C R, HAN J, et al. Scour effects on the response of laterally loaded piles considering stress history of sand[J]. Computers and Geotechnics, 2010, 37(7/8): 1008-1014.
[4]	MOSTAFA Y E. Effect of local and global scour on lateral response of single piles in different soil conditions[J]. Engineering, 2012, 4(6): 297-306.
[5]	POULOS H G, DAVIS T G. Pile foundation analysis and design[M]. New York: John Wiley and Sons, 1980.
[6]	EL SHARNOUBY B, NOVAK M. Static and low-frequency response of pile groups[J]. Canadian Geotechnical Journal, 1985, 22(1): 79-94.
[7]	任青, 黄茂松, 韩东晓. 考虑轴力的部分埋入群桩基础水平振动特性[J]. 岩石力学与工程学报, 2011, 30(9): 1932-1944. (REN Qing, HUANG Mao-song, HAN Dong-xiao. Lateral vibration properties of partially embedded pile groups foundation considering axial forces[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(9): 1932-1944. (in Chinese))
[8]	AI Z Y, LI Z X. Dynamic analysis of a laterally loaded pile in a transversely isotropic multilayered half-space[J]. Engineering Analysis with Boundary Elements, 2015, 54(1): 68-75.
[9]	AI Z Y, LI Z X. Time-harmonic response of transversely isotropic multilayered half-space in a cylindrical coordinate system[J]. Soil Dynamics and Earthquake Engineering, 2014, 66(1): 69-77.

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文章访问数: 452
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冲刷作用下层状横观各向同性土中群桩水平振动响应 English Version

作者简介: 艾智勇(1966- ),男,江西余江人,博士,教授,主要从事岩土及地下工程方面的教学和研究工作。E-mail: zhiyongai@tongji.edu.cn。

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出版历程

Horizontal vibration of a pile group in transversely isotropic layered soils under scour conditions

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出版历程

目录

作者简介:
艾智勇(1966- ),男,江西余江人,博士,教授,主要从事岩土及地下工程方面的教学和研究工作。E-mail: zhiyongai@tongji.edu.cn。