This paper describes a one-dimensional (1D) computational model for the analysis and design of laterally loaded monopile foundations for offshore wind turbine applications. The model represents the monopile as an embedded beam and specially formulated functions, referred to as soil reaction curves, are employed to represent the various components of soil reaction that are assumed to act on the pile. This design model was an outcome of a recently completed joint industry research project – known as PISA – on the development of new procedures for the design of monopile foundations for offshore wind applications. The overall framework of the model, and an application to a stiff glacial clay till soil, is described in a companion paper by Byrne and co-workers; the current paper describes an alternative formulation that has been developed for soil reaction curves that are applicable to monopiles installed at offshore homogeneous sand sites, for drained loading. The 1D model is calibrated using data from a set of three-dimensional finite-element analyses, conducted over a calibration space comprising pile geometries, loading configurations and soil relative densities that span typical design values. The performance of the model is demonstrated by the analysis of example design cases. The current form of the model is applicable to homogeneous soil and monotonic loading, although extensions to soil layering and cyclic loading are possible.

中文翻译：

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用于海上风力涡轮机的单桩PISA设计模型：在海洋沙中的应用

本文介绍了一维（1D）计算模型，用于分析和设计海上风力涡轮机应用中的侧向承载单桩基础。该模型将单桩表示为嵌入式梁，并采用特殊公式化的函数（称为土壤反应曲线）来表示假定作用于桩的土壤反应的各个组成部分。该设计模型是最近完成的一项联合工业研究项目（称为PISA）的成果，该项目涉及开发用于海上风电应用的单桩基础设计新程序的过程。该模型的整体框架，以及在坚硬的冰川黏土直到土壤上的应用，在Byrne及其同事的同伴论文中都有介绍；当前的论文描述了一种针对土壤反应曲线而开发的替代配方，适用于安装在离岸均质砂场上的单桩，用于排水负荷。使用来自一组三维有限元分析的数据对一维模型进行校准，该分析是在包括桩的几何形状，荷载配置和跨越典型设计值的土壤相对密度的校准空间上进行的。通过分析示例设计案例来证明模型的性能。该模型的当前形式适用于均质土壤和单调荷载，尽管可以扩展到土壤分层和循环荷载。使用来自一组三维有限元分析的数据对一维模型进行校准，该分析是在包括桩的几何形状，荷载配置和跨越典型设计值的土壤相对密度的校准空间上进行的。通过分析示例设计案例来证明模型的性能。该模型的当前形式适用于均质土壤和单调荷载，尽管可以扩展到土壤分层和循环荷载。使用来自一组三维有限元分析的数据对一维模型进行校准，该分析是在包括桩的几何形状，荷载配置和跨越典型设计值的土壤相对密度的校准空间上进行的。通过分析示例设计案例来证明模型的性能。该模型的当前形式适用于均质土壤和单调荷载，尽管可以扩展到土壤分层和循环荷载。