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海上风电单柱复合筒型基础复合加载条件下的承载特性

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为研究新型海上风电单柱复合筒型基础在二维复合加载条件下的承载特性,利用有限元模型计算,首先得到模型在一维荷载空间下的极限承载力,随后通过施加不同的竖向荷载,得到在V-H、V-M、V-H-M荷载空间下的承载能力包络图,并分析不同二维荷载工况下的单柱复合筒型基础各位置处的土压力分布情况以及筒体底部等效塑性应变区的变化情况.结果表明:对于单柱复合筒型基础,在一定范围内,竖向荷载(0～0.15倍竖向极限承载力)的存在能够增大结构的水平及弯矩承载力;在V-H与V-M荷载空间中,基础各位置处的土压力变化、土体等效塑性应变变化具有一定的相似性,可互相对映参考;基础所承受的最大土压力位置与基础受力倾倒方向一致;随着竖向荷载的增加,结构达到极限承载力时,基础底部土体等效塑性应变区的范围与深度相应扩大.
Load-Bearing Characteristics of Offshore Wind Power Single Column Composite Bucket Foundation Under Composite Loading Conditions
To study the bearing characteristics of a new type of offshore wind power single column composite bucket foundation under two-dimensional composite loading conditions,a finite element model is used to calculate the ultimate bearing capacity of the model in one-dimensional load space.By applying different vertical loads,the two-dimensional bearing capacity envelope diagrams in V-H,V-M and V-H-M load spaces are obtained,and the distribution of soil pressure at various positions of the single column composite bucket foundation under different two-dimensional working conditions are analyzed,as well as the changes in the equivalent plastic strain zone at the bottom of the bucket.The results indicate that for single column composite bucket foundations,within a certain range,the presence of vertical loads(0-0.15 vertical ultimate bearing capacity)can increase the horizontal and moment bearing capacity of the structure.In the V-H and V-M load spaces,the changes in soil pressure and equivalent plastic strain of the soil at various positions of the foundation have certain similarities and can be referenced to each other.The position of the maximum earth pressure borne by the foundation is consistent with the direction of the foundation's force dumping.As the vertical load increases,the range and depth of the equivalent plastic strain zone of the soil at the bottom of the foundation correspondingly expand when the structure reaches its ultimate bearing capacity.

single column composite bucket foundationtwo dimensional composite loading conditionscarrying capacity envelope diagramsoil pressure distributionequivalent plastic strain zone of soil

张浦阳、郭文俊

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天津大学,水利工程智能建设与运维全国重点实验室,天津 300072

单柱复合筒型基础 二维复合加载条件 承载能力包络图 土压力分布 土体等效塑性应变区

国家自然科学基金面上项目

52171274

2024

10.3969/j.issn.2095-560X.2024.02.002

新能源进展

新能源进展

CSTPCD北大核心
影响因子：0.796
ISSN：
年,卷(期)：2024.12(2)
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