Abstract Offshore wind turbines (OWT) are generally founded on piles or gravity base foundations. Up to now, there is a lack of validated and standardized analysis procedures for such foundations, especially for the serviceability limit state, i.e. for the prediction of accumulated deformations. In order to gain experience on the behaviour of a OWT gravity base foundation under typical offshore loading conditions, a full-scale test has been performed near the shore of the North Sea. The test foundation was subjected to about 1.5 million load cycles simulating several storm events. The foundation and the sandy subsoil have been extensively instrumented so that a large amount of measured data on the cyclic soil-structure interaction were collected. Meanwhile, a numerical procedure for the proof of the serviceability for OWT foundations was developed. The procedure is based on finite element (FE) calculations in combination with a high-cycle accumulation (HCA) model. The application of the HCA model in simulations of the full-scale test is described in this contribution. The essential simplification of the subsoil and the determination of the input parameters for the FE simulations are shown. The settlements, pore water pressures and soil pressures predicted by the HCA model are compared to the measurements.

中文翻译：

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基于海上风力涡轮机重力基础全尺寸试验重新计算的沙子高循环堆积模型检验

摘要 海上风力涡轮机（OWT）通常建立在桩或重力基础上。到目前为止，缺乏针对此类地基的经过验证和标准化的分析程序，尤其是对于使用极限状态，即对累积变形的预测。为了获得有关 OWT 重力基础在典型海上载荷条件下的行为的经验，在北海海岸附近进行了全面测试。测试基础经受了大约 150 万次负载循环，模拟了几次风暴事件。地基和沙质底土已广泛使用仪器，因此收集了大量关于循环土壤-结构相互作用的测量数据。同时，开发了用于证明 OWT 基础适用性的数值程序。该程序基于有限元 (FE) 计算并结合高循环累积 (HCA) 模型。本贡献描述了 HCA 模型在全尺寸测试模拟中的应用。显示了底土的基本简化和有限元模拟输入参数的确定。将 HCA 模型预测的沉降、孔隙水压力和土壤压力与测量结果进行比较。