An analytical continuum model for axially loaded end‐bearing piles in inhomogeneous soil
An analytical continuum model for axially loaded end‐bearing piles in inhomogeneous soil
复制标题
非均质土中轴向受力端承桩的解析连续体模型
DOI：
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复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Aggelos Tsikas
中科院分区：
文献类型：
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作者：
G. Anoyatis;G. Mylonakis;Aggelos Tsikas
推导了剪切模量随深度呈幂律变化的非均质土中轴向受荷端承桩的弹性沉降和荷载传递机理的近似静力解。建议的广义配方可以处理不同类型的土壤不均匀性，通过采用相关的特征展开的因变量的垂直坐标，在静态土壤“模式”的形式，类似于结构动力学中使用的。相反，现有的模型均质土壤，相关联的傅立叶系数耦合，作为一组联立代数方程的解决方案，考虑模式的数量相等的秩。推导出以下各项的闭合解：（1）桩头刚度;（2）桩沉降、轴向应力和侧摩阻力剖面，从而得出实际的、与深度相关的Winkler模量;（3）土体中的位移和应力场;（4）与桩头沉降相匹配的、与深度无关的平均Winkler模量。通过与有限元分析的比较，验证了该模型的预测能力。探讨了现有的平均Winkler模量回归公式对非均质土的适用性。
An approximate static solution is derived for the elastic settlement and load‐transfer mechanism in axially loaded end‐bearing piles in inhomogeneous soil obeying a power law variation in shear modulus with depth. The proposed generalised formulation can handle different types of soil inhomogeneity by employing pertinent eigenexpansions of the dependent variables over the vertical coordinate, in the form of static soil “modes”, analogous to those used in structural dynamics. Contrary to available models for homogeneous soil, the associated Fourier coefficients are coupled, obtained as solutions to a set of simultaneous algebraic equations of equal rank to the number of modes considered. Closed‐form solutions are derived for the (1) pile head stiffness; (2) pile settlement, axial stress, and side friction profiles leading to actual, depth‐dependent Winkler moduli, (3) displacement and stress fields in the soil; and (4) average, depth‐independent Winkler moduli to match pile head settlement. The predictive power of the model is verified via comparisons against finite element analyses. The applicability to inhomogeneous soil of an existing regression formula for the average Winkler modulus is explored.
非均质土中轴向受力桩的 Winkler 模型
DOI：
10.1680/jgele.18.00062
发表时间：
2018
期刊：
Géotechnique Letters
影响因子：
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作者：
Crispin J
通讯作者：
Crispin J