复合加载下海上风电四筒基础地基承载力特性研究
BEARING CAPACITY CHARACTERISTICS OF FOUR-BUCKET FOUNDATION IN OFFSHORE WIND TURBINES UNDER COMBINED LOADING CONDITIONS
曹政 1李智 2江琦 3董霄峰 1王海军 1练继建1
作者信息
- 1. 天津大学水利工程仿真与安全国家重点实验室,天津 300350;天津大学建筑工程学院,天津 300350
- 2. 长江三峡集团福建能源投资有限公司,福州 350001
- 3. 天津大学建筑工程学院,天津 300350;华北水利水电大学水利学院,郑州 450046
- 折叠
摘要
以福建某海上风电场四筒导管架基础为研究对象,通过数值模拟方法建立四筒基础-地基整体模型,研究四筒基础在V-H(竖向-水平荷载)、V-M(竖向-弯矩荷载)、H-M(水平-弯矩荷载)和V-H-M(竖向-水平-弯矩荷载)作用下的地基失效模式.结果表明:在V-H和H-M加载模式下,四筒基础竖向极限承载力和弯矩极限承载力均随着水平力的增大而减小,且弯矩极限承载力与水平力之间呈现出线性减小的趋势;在V-M加载模式下,随着竖向荷载的不断增大,四筒基础主要运动形式从转动转换为平动;V-H-M加载模式下的承载力包络线随着竖向荷载的增大向外扩张,且竖向荷载的作用明显提高了地基水平和弯矩极限承载力.
Abstract
To investigate the failure modes of four-bucket foundation under V-H(rertical-horizontal load),V-M(vertical-moment lood),H-M(horizontal-moment load)and V-H-M(vertical-horizontal-moment load),an overall model of four-bucket foundation with layered soil ground was established by means of ABAQUS based on a practical offshore wind project in Fujian,China.It shows that in V-H loading and H-M loading conditions,the vertical bearing capacity decreases as the horizontal load increases and the moment bearing capacity decreases proportionally with the increasing horizontal load.The motion pattern of four-bucket foundation changes from rotation to translation with the increase of vertical load under V-M combined loading condition.In V-H-M loading condition,the bearing capacity failure envelope will expand when the vertical load increases.The vertical load can obviously enhance the horizontal and moment bearing capacity of four bucket foundation.
关键词
海上风电/四筒基础/复合加载/地基承载力/破坏包络面Key words
offshore wind power/four-bucket foundation/combined load/bearing capacity of foundation/failure envelope引用本文复制引用
基金项目
福建深远海海上风电机组基础设计施工关键技术研究项目(CTGFB/003-2018)
国家自然科学基金(51909188)
出版年
2024
NETL
NSTL
维普
万方数据