Multi-physical driven time-dependent reliability analysis framework for reinforced concrete floating wind turbine foundations considering climate change

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-12 DOI:10.1016/j.tws.2025.113309

Jiaxin Zhang , Hongyuan Guo , Jafar Jafari-Asl , You Dong , Emilio Bastidas-Arteaga , Hongzhi Cui

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Abstract

As a critical component of floating offshore wind turbines (FOWTs), reinforced concrete (RC) floating foundations are typically designed to last two to three times longer than the upper structure. However, their durability and reliability are challenged due to the coupled effects of corrosion and fatigue in harsh marine environments. This study proposes a multi-physics coupling framework to explore the deterioration mechanisms of RC-FOWT foundations under dynamic wind-wave loading and adverse environments. A cylindrical chloride diffusion model quantifies chloride transport in concrete, considering temperature, humidity, and fatigue-induced cracks. A pitting corrosion model assesses the cross-sectional loss and pitting depth of steel reinforcements, while the Paris-Erdogan fatigue crack growth model simulates corrosion-induced crack propagation under cyclic loading. Additionally, probability density function informed method-driven probabilistic analysis and various climate change scenarios predict the time-dependent failure probability of FOWT foundations. Results indicate that extreme climate change scenarios may increase energy production by 12.9% compared to non-climate-change scenario. However, chloride diffusion and corrosion rates accelerate by 62%, significantly speeding up crack propagation and reducing structural lifespan by approximately 49.15%. This study highlights the trade-off between increased energy production and accelerated structural deterioration due to climate change, emphasizing the need for balanced design considerations.

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考虑气候变化的钢筋混凝土浮式风力机基础多物理驱动时变可靠性分析框架

作为海上浮式风力发电机的关键部件，钢筋混凝土（RC）浮式基础的使用寿命通常是上部结构的两到三倍。然而，在恶劣的海洋环境中，由于腐蚀和疲劳的耦合作用，它们的耐久性和可靠性受到了挑战。本研究提出了一个多物理场耦合框架，探讨RC-FOWT地基在动力风浪荷载和恶劣环境下的劣化机制。圆柱氯化物扩散模型量化氯化物在混凝土中的传输，考虑温度、湿度和疲劳引起的裂缝。点蚀模型评估钢筋的截面损失和点蚀深度，而Paris-Erdogan疲劳裂纹扩展模型模拟循环加载下腐蚀诱导的裂纹扩展。此外，概率密度函数指示方法驱动的概率分析和各种气候变化情景预测了FOWT基础随时间变化的破坏概率。结果表明，与非气候变化情景相比，极端气候变化情景可使能源产量增加12.9%。然而，氯化物的扩散和腐蚀速率加快了62%，显著加快了裂纹扩展，使结构寿命缩短了约49.15%。这项研究强调了由于气候变化导致的能源生产增加和结构加速恶化之间的权衡，强调了平衡设计考虑的必要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.