Abstract This paper presents a hybrid numerical tool for nonlinear piled rafts analysis. The nonlinear pile behavior is represented by a hyperbolic function, which intends to simulate the variation in pile stiffness during loading. As the nonlinear behavior of piles is restricted to a very thin zone next to the pile interface, only the linear elastic effects are considered in the interaction factors between foundation elements. The influence of using Kirchhoff or Mindlin plate finite elements to model the raft is discussed. The code was compared to other well tested numerical tools, three model tests on piled raft foundation carried out at the Nagoya Institute of Technology (NIT) and also a well-known case of piled raft foundation (Hyde Park Cavalry Barracks in London). The code showed a very good agreement, proving its consistency and potential for use in piled raft analysis and design.

中文翻译：

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用于桩筏非线性分析的混合数值工具

摘要 本文提出了一种用于非线性桩筏分析的混合数值工具。非线性桩行为由双曲线函数表示，旨在模拟加载过程中桩刚度的变化。由于桩的非线性行为仅限于桩界面附近的一个非常薄的区域，因此在基础元素之间的相互作用因素中仅考虑线弹性效应。讨论了使用 Kirchhoff 或 Mindlin 板有限元对筏进行建模的影响。将该代码与其他经过良好测试的数值工具、在名古屋理工学院 (NIT) 进行的三个桩筏基础模型试验以及一个著名的桩筏基础案例（伦敦海德公园骑兵营）进行了比较。代码显示出非常好的一致性，