Fatigue Failure Mechanics of Polymer-modified Concrete in the Marine Environment

海洋环境中聚合物改性混凝土的疲劳破坏机制

• 批准号: 2882083
• 金额: --
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2882083
• 关键词: Fatigue; Failure; Mechanics; Polymer; modified

Floating substructures that support offshore wind turbines have widely been constructed from steel, but research has suggested a shift towards use of concrete, due to its lower manufacturing costs, lower carbon footprint and better cost stability, which aligns with government target of achieving 60% UK content by 2030. However, lack of confidence in conventional concrete materials has led to exacting design requirements to ensure their water tightness, leading to excessive thickness that hinders their floatability. This project targets development of innovative polymer-modified concrete materials for lightweight floating platforms. Compared with conventional concrete, polymer-modified concrete has advantages of rapid curing, high impact resistance, high ductility and excellent bonding to reinforcement, which will enable thinner design and eventually less use of materials. Existing research has demonstrated the superior static structural behaviour, but no research has been published on the all-important fatigue failure mechanism. Fundamental research on fatigue is thus needed to unlock its significant potential for offshore structures. This project is a multi-disciplinary project, which involves materials characterisation, structural engineering, chemical engineering and marine engineering.

支持海上风力涡轮机的浮动子结构已广泛使用钢材建造，但研究表明，由于其制造成本较低，碳足迹较低，成本稳定性更好，因此转向使用混凝土，这与政府到2030年实现60%英国含量的目标一致。然而，对传统混凝土材料缺乏信心，导致严格的设计要求，以确保其水密性，导致厚度过大，阻碍了其漂浮性。该项目的目标是开发用于轻型浮动平台的创新聚合物改性混凝土材料。与传统混凝土相比，聚合物改性混凝土具有快速固化、高抗冲击性、高延展性和与钢筋良好粘结的优点，这将使设计更薄，最终使用更少的材料。现有的研究已经证明了上级的静态结构性能，但没有研究已经发表的所有重要的疲劳破坏机制。因此，需要对疲劳进行基础研究，以释放其在海洋结构物中的巨大潜力。该项目是一个多学科的项目，涉及材料表征，结构工程，化学工程和海洋工程。