哈尔滨工程大学学报2025，Vol.46Issue(4)：683-695,13.DOI:10.11990/jheu.202303037
砂土中多筒导管架基础的循环承载特性
Cyclic bearing characteristics of multibucket jacket foundation in sand
摘要
Abstract
Aiming to analyze the bearing characteristics of offshore wind turbine foundations under periodic cyclic loads,this study systematically investigated the horizontal bearing behavior of multibucket jacket foundations in satu-rated sand by combining model tests and finite element methods for various foundation configurations and loading di-rections.The results indicated that the loading angle had minimal influence on the ultimate bearing capacity of the foundation.Under cyclic loads,the cumulative deformation growth rate of the foundation gradually decreased.Addi-tionally,a larger amplitude ratio resulted in a greater cyclic cumulative rotation angle,with the tripod jacket founda-tion exhibiting a slightly larger cumulative rotation angle than the tetrapod jacket foundation.Furthermore,long-peri-od cyclic loads caused the unloading stiffness of the foundation to stabilize at 1.5 to 2 times its unloading stiffness val-ue after the first cycle.The plastic zone for tripod and tetrapod jacket foundations was primarily distributed at the top and front end of the tube skirt,respectively,exhibiting wedge-shaped and spoon-shaped failure modes.By contrast,no through-type failure surface was observed at the bottom of the tube.Under horizontal and moment loading,the ro-tation center of the foundation was located at the junction between the tube base and the mud surface,where soil pressure concentrated near the compression tube,and minimal disturbance was observed in the rear soil.关键词
海上风电/多筒导管架基础/极限承载力/循环荷载/卸载刚度/累积转角/塑性变形/土压力Key words
offshore wind power/multibucket jacket foundation/bearing capacity/cyclic load/cyclic stiffness/ac-cumulated rotation/plastic deformation/soil pressure分类
建筑与水利引用本文复制引用
张浦阳,冯嘉成,乐丛欢,丁红岩..砂土中多筒导管架基础的循环承载特性[J].哈尔滨工程大学学报,2025,46(4):683-695,13.基金项目
国家自然科学基金项目(52171274). （52171274）
