摘要
为研究海上风电高桩承台基础结构在风电机组大弯矩荷载及复杂海洋环境荷载作用下的受力及传力机理,采用在数值模型中逐级加载的方式,模拟不同荷载量级情况下基础受力特性,获得了高桩承台组合结构的关键承载部位,分析了混凝土承台及斜向钢管桩受力特性.研究结果表明,随着风电机组荷载和环境荷载的增大,混凝土承台承载模式将由轴压承载向偏压转变;钢管桩顶部与混凝土承台接触部位是承载及荷载传递的关键部位,混凝土受拉损伤首先从此处开始;随着荷载的增大,斜向钢管桩群桩应力最大部位将从波流荷载作用点向泥面处转变.研究明晰了海上风电高桩承台基础的荷载传递规律及关键部位,为基础结构的安全设计提供了指导.
In order to investigate the force transmission mechanism of offshore high pile cap foundation under large bending moment loads from wind turbine units and complex marine environmental loads,we use a step-by-step loading method in a numerical model to stimulate the mechanical characteristics of the foundation under different load magnitudes.We obtain the key bearing parts of the high pile cap structure,and analyze the mechanical characteristics of the concrete cap and oblique steel pipe pile.The results show that as the wind turbine loads and environmental loads increase,the bearing mode of the concrete cap shifts from axial compression to bias compression.The contact area between the top of the steel pipe pile and the concrete cap is identified as the critical part for load bearing and transmission,where tensile damage of the concrete first occurs.With increasing loads,the maximum stress of the steel pipe pile shifts from the wave flow load application point to the mud surface.This research clarifies the load transfer law and key parts of the high pile cap foundation,providing guidance for the safety design of foundation structures.
作者
祝周杰
詹懿德
马彬
王海军
张晓雪
李秉轩
ZHU Zhoujie;ZHAN Yide;MA Bin;WANG Haijun;ZHANG Xiaoxue;LI Bingxuan(Power China Huadong Engineering Co.Ltd.,Hangzhou 311122,Zhejiang Province,P.R.China;State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin University,Tianjin 300350,P.R.China;School of Civil Engineering,Tianjin University,Tianjin 300350,P.R.China)
出处
《深圳大学学报（理工版）》
CAS
CSCD
北大核心
2024年第4期509-516,共8页
Journal of Shenzhen University(Science and Engineering)
基金
中国电建集团华东勘测设计研究院有限公司科技资助项目(KY2021-XNY-02-25)
国家自然科学基金资助项目(51909188)。
关键词
结构工程
高桩承台
钢管桩
大弯矩荷载
传力机理
逐级加载
关键部位
荷载传递
structural engineering
high pile cap foundation
steel pipe pile
large bending moment load force
transmission mechanism
step-by-step loading
the key bearing parts
the load transfer
