Nonlinear analysis of laterally loaded rigid piles in cohesive soil
Nonlinear analysis of laterally loaded rigid piles in cohesive soil
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DOI：
10.1002/nag.1094
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发表时间：
2013-02
影响因子：
4
通讯作者：
Lianyang Zhang;S. Ahmari
中科院分区：
文献类型：
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作者：
Lianyang Zhang;S. Ahmari
本文提出了一种粘性土中水平受荷刚性桩的非线性分析方法。该方法考虑了力和力矩的平衡，导出了刚性桩在水平偏心荷载作用下的系统方程。然后，使用迭代方案求解系统方程，以获得桩的响应。该方法考虑了极限侧阻力随深度的非线性变化，并采用本文提出的新的封闭式表达式来确定侧向承载系数。该方法还考虑了桩端水平抗剪承载力，并采用了桩端水平抗剪承载力与桩端位移的双线性关系。为简单起见，假定水平地基反力模量随深度变化为常数，这适用于超固结粘土中的桩。考虑了地基水平反力模量随桩顶位移的非线性。通过与三维有限元分析结果的比较，证明了该方法的有效性。所开发的方法分析五个现场测试桩的应用程序也表现出良好的预测和实验结果之间的一致性。该方法为粘性土中横向受荷刚性桩的分析提供了一种简单有效的方法。版权所有© 2011约翰威利父子有限公司.
This article presents a method for the nonlinear analysis of laterally loaded rigid piles in cohesive soil. The method considers the force and the moment equilibrium to derive the system equations for a rigid pile under a lateral eccentric load. The system equations are then solved using an iteration scheme to obtain the response of the pile. The method considers the nonlinear variation of the ultimate lateral soil resistance with depth and uses a new closed‐form expression proposed in this article to determine the lateral bearing factor. The method also considers the horizontal shear resistance at the pile base, and a bilinear relationship between the shear resistance and the displacement is used. For simplicity, the modulus of horizontal subgrade reaction is assumed to be constant with depth, which is applicable to piles in overconsolidated clay. The nonlinearity of the modulus of horizontal subgrade reaction with pile displacement at ground surface is also considered. The validity of the developed method is demonstrated by comparing its results with those of 3D finite element analysis. The applications of the developed method to analyze five field test piles also show good agreement between the predictions and the experimental results. The developed method offers an alternative approach for simple and effective analysis of laterally loaded rigid piles in cohesive soil. Copyright © 2011 John Wiley & Sons, Ltd.