Seismic response of monopiles in liquefiable soils

海上风能在向低碳能源供应过渡过程中发挥着重要作用。英国的目标是到2030年提供三分之一的使用OW能源的电力(到2030年为30 GW)。在欧洲OW市场日趋成熟的同时，欧洲OW开发商正在利用他们的技术专长在东亚等地震活跃地区开发OW农场。这种扩张的挑战是需要设计坚固的基础，以承受更大的地震荷载，并在可液化的土壤中保持稳定。到目前为止，由于其相对简单的构造和安装，单体膜是目前最受欢迎的基础选择。这些单桩支撑着巨大的OW涡轮机，与地震引起的循环荷载和可能的液化引起的地面变形相结合。目前缺乏评估大直径单桩循环载荷的指南和方法。通过投资于稳健的循环评估方法，可以极大地降低OW基础的成本。该项目将旨在通过提出承受地震引起的循环荷载的离岸风基的设计指南来弥补这一研究空白。这项工作将涉及实验测试和数值建模。

Offshore wind (OW) plays an important role in the transition to low carbon energy supply. The UK is aiming to provide a third of all electricity using OW energy by 2030 (30 GW by 2030). Whilst the European OW market is becoming mature, European OW developers are now using their technical expertise to develop OW farms in seismically active zones such as East Asia. The challenge in this expansion is the need to design robust foundations to withstand larger earthquake loads and remain stable in liquefiable soils. To date, monopiles are by far the most popular foundation option due to their relatively simple construction and installation. These monopiles support the massive OW turbines on combination with the earthquake-induced cyclic loads and possibly liquefaction-induced ground deformations. The current guidelines and methods for assessing cyclic loading of large diameter monopiles are lacking. There is great potential to lower OW foundation costs by investing in robust cyclic assessment methodologies.The project will aim to address this research gap by proposing guidelines for the design of Offshore wind foundations subjected to earthquake-induced cyclic loading. The work will involve experimental testing and numerical modelling.