岩土力学2023，Vol.44Issue(12)：3495-3500,6.DOI:10.16285/j.rsm.2023.0032
砂土中海上锚板抗拔极限状态的可靠度分析
Reliability of offshore plate anchor design in sand for uplift limit state
摘要
Abstract
The offshore wind industry needs to move towards floating offshore wind turbines(FOWTs)that are secured to the seabed with anchoring systems in order to harness the more substantial amounts of offshore wind resources available in deep waters.The design of the anchoring system for FOWTs is crucial to ensure stability and safety in challenging offshore conditions.As a simplified reliability-based design approach,the partial safety factor method remains important in current offshore foundation design practice,but its effectiveness in achieving the required target safety level still needs to be examined.To achieve this end,a reliability analysis is performed for the uplift limit state design of strip plate anchors embedded in sand subjected to vertical loads,and a wide range of load cases are considered in the analysis.The failure probabilities of strip plate anchors designed with the partial safety factor method are estimated and then compared to the target safety levels.The results show that the estimated reliability index decreases rapidly with the increasing of permanent to variable action ratio and gradually converges to a relatively steady state.In addition,the current partial safety factor method has been shown to be conservative for offshore plate anchor design over a wide range of permanent to variable action ratios.The results provide probabilistic insights into the effectiveness of the partial safety factor method and may aid in the further development of reliability analysis for offshore anchors.关键词
可靠度分析/分项安全系数法/抗拔极限状态/海上锚板/排水条件Key words
reliability analysis/partial safety factor method/uplift limit state/offshore plate anchors/drainage conditions分类
建筑与水利引用本文复制引用
李雨婷,陈晓斌,何鹏鹏..砂土中海上锚板抗拔极限状态的可靠度分析[J].岩土力学,2023,44(12):3495-3500,6.基金项目
中国中铁股份有限公司科技研究开发计划(No.2022-重大专项-07).This work was supported by the Science and Technology Research and Development Plan of China Railway Co.,Ltd.(2022-Major Project-07). （No.2022-重大专项-07）
