RATIONALITY OF LOAD TRANSFER APPROACH FOR PILE ANALYSIS
RATIONALITY OF LOAD TRANSFER APPROACH FOR PILE ANALYSIS
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DOI：
10.1016/s0266-352x(98)00010-x
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发表时间：
1998-07
影响因子：
5.3
通讯作者：
W. Guo;M. Randolph
中科院分区：
文献类型：
--
作者：
W. Guo;M. Randolph
新的封闭形式的解决方案，占非均匀，弹塑性或粘弹性土壤特性已被建立为一个单一的桩受到垂直荷载，并为垂直荷载桩群。解决方案是基于荷载传递方法，桩土相互作用的特点是分布在桩身和桩基础的弹簧。因此，解的准确性在于将载荷传递曲线的梯度与弹性模量值联系起来的载荷传递因子。本文提出了一个广泛的调查荷载传递方法，通过比较新的封闭形式的解决方案，嵌入在弹性介质中的桩与严格的数值分析。通过这种方式：1.荷载传递方法的合理性已被广泛探讨; 2.荷载传递系数已被校准的数值解，以考虑到一些因素，如深度的比例，下卧刚性层和桩长，土壤的非均匀性，泊松比的土壤，和桩的细长比的程度; 3。给出了荷载传递系数的计算公式。利用新的荷载传递系数，封闭形式的解可以在非常广泛的桩几何形状和土壤条件下以高精度应用。
New closed form solutions accounting for non-homogeneous, elastic plastic or visco-elastic soil properties have been established for a single pile subjected to vertical loading, and for vertically loaded pile groups. The solutions are based on load transfer approach, with the pile–soil interaction being characterised by springs distributed down the pile shaft and at the pile base. As such, the accuracy of the solutions lie in the load transfer factors linking the gradient of the load transfer curves with elastic modulus values. This paper presents an extensive investigation into the load transfer approach, by comparing the new closed-form solutions for a pile embedded in an elastic medium with rigorous numerical analysis. By this means: 1. The rationality of the load transfer approach has been extensively explored; 2. Load transfer factors have been calibrated against the numerical solutions to account for a number of factors, such as the ratio of the depth to the underlying rigid layer and the pile length, the degree of soil non-homogeneity, Poisson’s ratio for the soil, and the pile slenderness ratio; 3. Expressions for estimating the load transfer factors have been provided. With the new load transfer factors, the closed form solutions may be applied with high accuracy over a very wide range of pile geometries and soil conditions.