[1]苏栋,袁胜强,李锦辉.水平单向及多向载荷下单桩响应的数值研究[J].深圳大学学报理工版,2011,28(No.5(377-470)):389-394.
　SU Dong,YUAN Sheng-qiang,and LI Jin-hui.Numerical study on response of a single pile under unidirectional and multidirectional horizontal loadings[J].Journal of Shenzhen University Science and Engineering,2011,28(No.5(377-470)):389-394.
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水平单向及多向载荷下单桩响应的数值研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第28卷
期数:
2011年No.5(377-470)
页码:
389-394
栏目:
土木建筑工程
出版日期:
2011-09-20

文章信息/Info

Title:
Numerical study on response of a single pile under unidirectional and multidirectional horizontal loadings
文章编号:
1000-2618(2011)05-0389-06
作者:
苏栋1; 袁胜强2; 李锦辉3
1)深圳大学土木工程学院，深圳 518060
2)河南徐辉建筑工程设计事务所，郑州450008
3)哈尔滨工业大学深圳研究生院，深圳 518055
Author(s):
SU Dong1; YUAN Sheng-qiang2; and LI Jin-hui3
1)College of Civil Engineering, Shenzhen University, Shenzhen 518060, P.R.China
2)Xuhui Architecture Design Firm, Zhengzhou 450008, P.R.China
3)Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, P.R.China
关键词:
岩土工程; 桩基; 砂土; 水平载荷; 多向载荷; 非共轴
Keywords:
geotechnical engineering;  pile foundation;  sandy soil;  horizontal loading;  multidirectional;  noncoaxial
分类号:
TU 4
文献标志码:
A
摘要:
利用大型有限元分析软件ABAQUS，建立砂土中单桩的三维弹塑性数值分析模型，通过三轴试验确定土体相关参数，研究水平单向载荷作用下桩头自由和固定时单桩的响应特性，及多向加载路径对单桩承载力的影响．结果表明，桩头自由的单桩在水平力作用下桩身的最大弯矩在土面下约4倍桩径处，桩运动前方土体隆起的最大值出现在桩前约0.5倍桩径处；桩头固定单桩的水平承载力约为桩头自由的2.65倍，且出现较大的桩顶弯矩；多向加载条件下的桩头水平承载力与单向加载条件相比明显减小，随着短长轴比增加，水平加载主方向（X方向）承载力降低，载荷最大值出现得更早．
Abstract:
In many practical projects，pile foundations are required to resist large horizontal loadings besides vertical loadings．A three-dimensional elastoplastic numerical analysis model was set up, useing the FEM software ABAQUS, to study the response of a single pile with a free head or a fixed head under the unidirectional horizontal loading，and to analyze the effect of the multidirectional loading path on the lateral loading capacity of the single pile．In these analyses，the parameters of the soil were determined according to the data of the triaxial tests．It is revealed from the numerical analyses that for the lateral loaded free-head pile，the maximum bending moment occurs at 4D below the soil surface and the maximum vertical displacements of the soil occurs at 0.5D in front of the pile．The lateral loading capacity of the fixed-head pile is about 2.65 times that of the free-head pile，and the maximum bending moment of the former is much larger than that of the latter．The lateral loading capacity under multidirectional paths is apparently smaller than that under unidirectional path. This is consistent with that observed in the experiments．With the increasing aspect ratio，the loading capacity reduces and the maximum force appears earlier．

参考文献/References:

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［9］ 苏栋，李霞，李相崧．桩-土水平相互作用的颗粒流数值研究［J］．深圳大学学报理工版，2006，23(1)：42-47．


［1］ XU Bin，LU Jian-fei，WANG Jian-hua．Dynamic responses of a pile embedded in a layered poroelastic half-space to harmonic lateral load［J］．International Journal for Numerical and Analytical Methods in Geomechanics， 2010，34(5)：493-515．
［2］ Ali B．Single piles under horizontal loads in sand：determination of p-y curves from the prebored pressuremeter test［J］．Geotechnical and Geological Engineering，2007，25(3)：83-301．
［3］ WANG Mei，LOU Zhi-gang，LI Jian-xiang，et al．Nonlinear analysis of m method for single pile under lateral loading［J］．Rock and Soil Mechanics，2002，23(1)：23-26．(in Chinese)
［4］ Sanjeev K，Latika L ， Maher O．Nonlinear response of single piles in sand subjected to lateral loads using kh max approach［J］．Geotechnical and Geological Engineering，2006，24(1)：163-181．
［5］ LIU Han-long，TAO Xue-jun，ZHANG Jian-wei，et al．Behavior of PCC pile composite foundation under lateral load［J］．Rock and Soil Mechanics，2010，31(9)：2716-2722．(in Chinese)
［6］ ZHAO Ming-hua，WANG You，HUANG Liang．Nonlinear analysis of meshless method for piles under horizontal load［J］．Chinese Journal of Geotechnical Engineering，2007，29(6)：907-912．(in Chinese)
［7］ QIAO You-gang．WU Xian-min．Non-linear finite element analysis of laterally loaded pile［J］．Port & Waterway Engineering，2009，4：38-42．(in Chinese)
［8］ LI Xiang-song．A sand model with state-dependent dilatancy［J］．Géotechnique，2002，52(3)：173-186．
［9］ SU Dong，LI Xia，LI Xiang-song．Numerical study on lateral soil-pile interaction by particle flow code［J］．Journal of Shenzhen University，2006，23(1)：42-47．(in Chinese)

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备注/Memo

备注/Memo:
收稿日期：2010-10-20；修回日期：2011-06-28
基金项目：国家自然科学基金资助项目（50978165）；深圳市公共科技资助项目（SY200806270074A）
作者简介：苏栋（1978-），男（汉族），福建省永定县人，深圳大学副教授. E-mail：sudong@szu.edu.cn
更新日期/Last Update: 2011-09-22