摘要
对单筒多舱筒型基础入土下沉过程进行稳定性分析,研究其失稳模式与临界屈曲荷载以及分舱板与纵向加劲肋对筒内外压差临界值的影响。结果表明,单筒多舱筒型基础筒体失稳属于极值点失稳,应采用非线性方法确定结构失稳的临界荷载;分舱板和适当间距的加劲肋均可提高筒体的临界屈曲荷载,但随筒顶接近泥面,其提升效果逐渐减小,筒内外压差控制条件转变为防止筒内土体发生渗透破坏。
The cylinder of offshore wind power bucket foundation is prone to buckling and instability when it is installed into the soil,which seriously affects the safety of the foundation structure.The thesis analyzes the stability of the bucket foundation in the sinking process and studies its instability mode and critical buckling load as well as the influence of the compartment and longitudinal stiffeners on the critical value of the internal and external pressure difference of the bucket.The results showed that the instability of the cylinder of the bucket foundation belongs to the extreme point instability and the nonlinear method should be used to determine the critical load of structural instability.Both the compartment and the stiffeners with appropriate spacing can increase the critical buckling load of the bucket.However,as the top of the tube top approaches the mud surface,its lifting effect gradually decreases,and the control condition of the internal and external pressure difference of the bucket is changed to prevent the soil in the bucket from permeating damage.
作者
王海军
刘伟
闫晓荣
练继建
Wang Haijun;Liu Wei;Yan Xiaorong;Lian Jijian(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China;Airport College,Civil Aviation University of China,Tianjin 300300,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2022年第7期402-408,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51508558,51825904)。
关键词
海上风电
屈曲
非线性分析
筒型基础
弧长法
加劲肋
offshore wind power
buckling
nonlinear analysis
bucket foundation
arc-length method
stiffeners
作者简介
通讯作者:王海军(1978-),男,博士、教授、博士生导师,主要从事水工结构、海上风电结构静动力等方面的研究。bookwhj@163.com。
