On the behavior of piles in non-cohesive soil under combined horizontal and vertical loading
On the behavior of piles in non-cohesive soil under combined horizontal and vertical loading
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DOI：
10.1007/s11440-010-0124-1
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发表时间：
2010-09-01
期刊：
影响因子：
5.7
通讯作者：
Thieken, Klaus
中科院分区：
文献类型：
--
作者：
Achmus, Martin;Thieken, Klaus
在许多应用领域中，桩用于将轴向和横向载荷传递到地面中。这种组合载荷导致水平和垂直承载行为的相互作用。然而，在目前的工程实践中，这些影响通常被忽略，因为缺乏一个明确的描述的相互作用和它们的定量的重要性依赖于系统参数。为此，建立了数值模拟模型，以识别和量化砂土中桩的联合荷载效应。通过与已发表的模型试验结果的比较，验证了该模型的有效性。模型结果质量良好。此外，模型测试及其评估方面的相互作用的方法的缺陷被确定。数值研究结果表明，组合压缩加载的最有利的效果，与组合拉伸加载的大多数不利的。然而，相互作用的行为是非常复杂的，并且，取决于加载条件，对系统刚度和极限载荷的相反的影响可能发生。提出了一个交互作用图，它给出了一个很好的印象的重要性，相互作用的影响。一个参数的研究表明，紧凑的桩与一个小的长径比和桩几乎刚性的行为表现出特别强的相互作用的影响。
In many fields of application, piles are used for the transfer of both axial and lateral loads into the ground. This combined loading leads to interaction of the horizontal and vertical load-bearing behavior. However, in current engineering practice these effects are usually neglected, since a clear description of the interactions and of their quantitative importance dependent on system parameters is lacking. A numerical simulation model was therefore established to identify and quantify the effects of combined loading of piles in sand soil. The model is validated by comparison with the results of published model tests. The model results are of good quality. Moreover, deficiencies of the model tests and their assessment with respect to interaction approaches were identified. The results of the numerical study show that with combined compression loading mostly favorable effects arise, with combined tension loading mostly unfavorable ones. However, the interaction behavior is very complex, and, depending on loading conditions, opposite effects on system stiffness and ultimate load can occur. An interaction diagram is presented, which gives a good impression of the importance of interaction effects. A parametric study shows that compact piles with a small length-to-diameter ratio and piles with almost rigid behavior show particularly strong interaction effects.