摘要
[目的]随着海上风机工程逐渐向深远海区域发展,海上恶劣的施工环境极有可能导致导管架基础灌浆连接的安装产生误差进而影响连接的轴向力学性能,故需要研究安装误差对于灌浆连接段轴向力学性能的影响规律。[方法]首先开展灌浆连接段缩尺试件的轴向静力加载试验,随后采用有限元分析方法来模拟对应试件的轴向加载过程,其模拟结果与试验数据显示出较好的拟合性。[结果]研究结果表明:纵向、横向安装误差的增大会导致灌浆连接段轴向刚度的增大,并会进一步改变套管和桩管的纵向应变分布;另外,安装误差的增大也会引起轴向加载过程中灌浆料内第三主应力最大值的增大和其分布位置的变化。[结论]综上所述,安装误差对导管架基础灌浆连接段轴向力学性能的影响可能导致灌浆连接段破坏模式的改变,故需根据安装误差的影响规律来对其危害予以充分的考虑与评估。
[Introduction]With the development of offshore wind turbine works to deep sea areas,the challenging construction environment tends to result in errors in the installation of the grouted connection for the jacket foundation.These errors can subsequently affect the axial mechanical properties of the grouted connection.Therefore,it is necessary to study the impact laws of installation errors on the axial mechanical properties of the grouted connection section.[Method]The study was commenced by conducting axial static loading tests on reduced-scale test piece of the grouted connection section,which was followed by simulating the axial loading process of the corresponding test piece using the finite element analysis method.The simulation results were found to align well with the experimental data,indicating a successful outcome.[Result]According to the research findings,the increasing in longitudinal and transverse installation errors can lead to an increase in the axial stiffness of the grouted connection section.This,in turn,further alters the longitudinal strain distribution of the casing and pile pipe.Additionally,the increase in installation errors can lead to an increase in the maximum value of the third principal stress in the grouting materials during the axial loading process,as well as changes in its distribution location.[Conclusion]In conclusion,the influence of installation errors on the axial mechanical properties of the grouted connection section for the jacket foundation can cause alterations in failure modes of the grouted connection section.Therefore,it is needed to consider and evaluate the harm caused by the impact laws of installation errors based on their influence rules.
作者
陈涛
时慧林
陈诚
陈珂
元国凯
CHEN Tao;SHI Huilin;CHEN Cheng;CHEN Ke;YUAN Guokai(Key Laboratory of Performance Evolution and Control for Engineering Structures(Ministry of Education),Tongji University,Shanghai 200092,China;Department of Structural Engineering,Tongji University,Shanghai 200092,China;China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,Guangdong,China)
出处
《南方能源建设》
2023年第4期32-42,共11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)。
关键词
灌浆连接段
安装误差
缩尺试验
有限元分析
轴向力学性能
grouted connection section
installation errors
reduced-scale experiment
finite element analysis
axial mechanical properties
