摘要
由于桩筒复合基础本身具有固有频率,为防止结构发生破坏,在设计其尺寸时应避免其固有频率与可能的荷载频率过分接近。本文利用ABAQUS软件对桩筒基础进行模态分析,得到最佳筒桩直径比和筒裙高度;对桩筒复合基础与传统单桩基础承载性能进行比较,讨论筒体和桩体受力特点;开展了室内试验,验证了模型的可靠性。结果表明:桩筒复合基础较单桩基础有明显承载优势和防冲刷效果,增加筒体直径是提高承载力的重要因素,而筒体高度超过一定值后承载力提高不显著。
To prevent structural damages,a pile-bucket foundation has an inherent frequency which should be separated from the natural frequency when designing its size. In this paper,the optimal aspect ratio and height of the skirt of a pile-bucket foundation are determined based on modal analysis through ABAQUS software. A comparison is made between the pile-bucket foundation and traditional a single pile foundation to explore the difference in their bearing performances. To verify the reliability of the numerical model,indoor model tests were carried out. The results show that the bearing capacity and sour resistant effect of the pile-bucket are better than those of the single pile foundation,and increasing the diameter of the cylinder is an important factor to increase the bearing capacity;however,when the height of the cylinder exceeds a certain value,the bearing capacity will not increase significantly.
作者
刘红军
张鹏
王荃迪
杨奇
LIU Hongjun;ZHANG Peng;WANG Quandi;YANG Qi(Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering,Ocean University of China,Qingdao 266100,China;Key Lab of Marine Environmental Science and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第7期1165-1171,共7页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(4152247)
山东省科技攻关项目(2014GGX104007)
关键词
海上风电
桩筒复合基础
模态分析
结构优化
固有频率
ABAQUS
承载性能
offshore wind power
pile-bucket foundation
modsl analysis
structure optimization
natural frequency
ABAQUS
bearing capability
