摘要
平板锚是新近出现的一种系泊深海浮式结构的基础形式。它兼具定位准确、施工时间短、对环境破坏小及经济性好等优点,随着海上油气开采逐步转向深海,已经引起国外海洋工程界的广泛关注。对大型有限元软件ABAQUS进行二次开发,研究圆形平板锚在非均质饱和黏土海床地基中的抗拉力,均质黏土条件下所得极限抗拉力系数与现有成果一致。在此基础上进行大量变动参数分析,探讨海床地基不排水抗剪强度随深度线性增加对抗拉力的影响,得出一些规律性认识,以期为工程设计提供参考。
Plate anchor is a new anchor foundation for mooring offshore floating structures. Following the extension of offshore oil/gas exploitation into deep-water area, and owing to the advantage of accurate location, short construction period, eeonomiealness and environment protection of the plate anchor, it has greatly attracted the attention of overseas ocean engineering ventures. The second development of the large FE software ABAQUS is employed to simulate uplift capacity of the circular anchor foundation in saturated heterogeneous clay. In the homogeneous clay, the numerical solutions of uplift capacity agree well with existing results. By means of parametric studies, the effect of the increase of undrained shear strength with embedded depth on the uplift capacity is investigated. Some laws obtained may serve as a reference for engineering design.
出处
《水运工程》
北大核心
2008年第7期1-6,共6页
Port & Waterway Engineering
关键词
抗拉力
非均质黏土
平板锚
有限元
uplift capacity
heterogeneous clay
plate anchor
finite elements
