The ultimate uplift capacity of multi-plate strip anchors in undrained clay
The ultimate uplift capacity of multi-plate strip anchors in undrained clay
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DOI：
10.1016/j.compgeo.2010.02.004
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发表时间：
2010-06
影响因子：
5.3
通讯作者：
R. Merifield;Colin C. Smith
中科院分区：
文献类型：
--
作者：
R. Merifield;Colin C. Smith
土锚通常用作基础系统，用于需要抗拔力的结构，如输电塔，或用于需要侧向阻力的结构，如板桩墙。相邻板通常具有多于一个的板或支承元件，因此由于重叠的应力区，相邻板之间存在复杂的相互作用。这种相互作用将影响破坏模式和极限承载力。然而，没有进行彻底的数值分析，以确定多板锚的极限拉拔荷载。到目前为止，大多数研究都是针对单锚（只有一块板）的抗拉上拔性能。本文的主要目的是利用数值模拟技术，以更好地了解平面应变多板锚基础的行为在粘土。将建立一个实用的多板锚基础的设计框架，以取代现有的半经验设计方法，是不充分的，并已被发现是过度或过度保守。然后，设计工程师可以使用该框架来更自信地估计多板锚在拉伸载荷下的抗拔能力。
Soil anchors are commonly used as foundation systems for structures requiring uplift resistance such as transmission towers, or for structures requiring lateral resistance, such as sheet pile walls. Anchors commonly have more than one plate or bearing element and therefore there is a complex interaction between adjacent plates due to overlapping stress zones. This interaction will affect the failure mode and ultimate capacity. However, no thorough numerical analyses have been performed to determine the ultimate pullout loads of multi-plate anchors. By far the majority of the research has been directed toward the tensile uplift behaviour of single anchors (only one plate). The primary aim of this research paper is to use numerical modelling techniques to better understand plane strain multi-plate anchor foundation behaviour in clay soils. A practical design framework for multi-plate anchor foundations will be established to replace existing semi-empirical design methods that are inadequate and have been found to be excessively under or over conservative. This framework can then be used by design engineers to more confidently estimate the pullout capacity of multi-plate anchors under tension loading.