浅析海上风电灌浆连接段力学研究发展及趋势  

Brief Analysis of the Development of Mechanical Research and Trends of Grouted Connection of Offshore Wind Turbine

作　　者：陈珂 张力 廖侃 CHEN Ke;ZHANG Li;LIAO Kan(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,Guangdong,China)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广东广州510663

出　　处：《南方能源建设》2023年第1期57-63,共7页Southern Energy Construction

基　　金：广东省促进经济发展专项基金“基于大数据的海上风电场支撑结构强度与疲劳实时评估研究”(粤自然资源合[2019]019)。

摘　　要：[目的]海上风电机组基础与上部结构连接通常采用灌浆连接方式,保证灌浆连接段的安全性至关重要,灌浆连接段的研究一直是重点和难点。[方法]对过往海上风电灌浆连接段的相关力学研究进行综述,介绍了海上风电灌浆材料的基本力学性能,总结了灌浆连接段的受力机理和影响承载力的因素,并对现有规范设计和未来研究方向进行阐述。[结果]灌浆连接段对灌浆材料的使用要求严苛,需要使用高强灌浆料。在轴压作用下,灌浆连接段通常表现为斜压短柱的延性破坏模式,承载力主要受到灌浆连接段径向刚度、剪力键的高距比和形状、灌浆连接段长径比以及灌浆材料强度的影响。相关设计规范对极限承载力的设计均有明确的设计方法,但在疲劳设计方面研究较少,存在不完善的情况。[结论]因此,尚需进一步研究灌浆连接段浸没在水中的疲劳性能。同时,未来在试验研究上需要采用足尺或小缩尺的试件,在数值研究上需要采用精细化的数值模型进行分析。[Introduction]The connection between offshore wind turbine foundation and superstructure is usually made by grouting.It is crucial to ensure the safety of the grouted connections,and the study of grouted connections is always a key and difficult point.[Methods]A review of relevant mechanical studies on grouted connections of offshore wind turbines was conducted.The basic mechanical properties of grouted materials for offshore wind turbines were described.The force mechanism of grouted connections and the factors affecting the bearing capacity were summarized,and the existing code design and future research directions were described.[Result]The grouted connection has severe requirements for the use of grouting materials.Therefore,the high-strength grout needs to be used.Under axial compression,the grouted connections usually exhibit a ductile damage mode of the compression struts.The bearing capacity of grouted connections is mainly influenced by the radial stiffness of grouted connections,the height-to-spacing ratio of shear keys,the shape of shear keys,the length-to-diameter ratio of grouted connections and the strength of grouting materials.The relevant design codes have clear design methods for the design of ultimate bearing capacity,but there are few studies and imperfections in fatigue design.[Conclusion]Therefore,it is necessary to further research the fatigue performance of grouted connections submerged in water.Moreover,it is necessary to use full-scale or small-scale specimens in future experimental studies,and refined numerical models need to be used for analysis in numerical studies.

关 键 词：灌浆连接段 轴向承载力 疲劳 浸没 受力机理 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程] TU312.1[建筑科学—结构工程]