摘要
海上风电机组的基础所处的工作环境特殊,遭受的荷载复杂。现有的基础类型均存在成本高、施工难等问题。因此,急需研究和开发成本低廉、施工简便的海上风机基础形式。本文提出了一种新型重力式海上风机基础的概念设计,基于传统的重力式基础,将预应力锚杆应用于其中,组成一种新型的基础形式:锚杆重力式海上风机基础。采用通用有限元分析软件ABAQUS对此新型基础的承载特性进行了三维有限元数值分析,探讨了锚杆重力式基础在外荷载分量的单独作用下,地基土体的承载特性和破坏机理以及锚杆的主要作用。结果表明,锚杆的存在显著地提高了地基极限承载力并改变了地基破坏形式。这说明了锚杆重力式海上风机基础具有良好的应有前景。
The offshore wind turbine foundations are generally subjected to complex loading due to their special working conditions. Existing types of offshore wind turbine foundations have some problems,e. g. high cost and difficulty construction. Therefore,it is urgent to develop new types of offshore wind turbine foundations which are inexpensive and easy to construct. Based on conventional gravity foundations,a novel type of offshore wind turbine foundation,the anchor gravity offshore wind turbine foundation was proposed by using pre-stressed anchors. By using the FEM software ABAQUS,the bearing behavior of subsoil under the new foundation and its failure mechanism are analyzed by 3D FEM in this study with emphasis on the effects of anchors. The results show that the anchors can significantly improve the bearing capacity of subsoil,and change the failure mode of the subsoil under single load component.
出处
《地下空间与工程学报》
CSCD
北大核心
2013年第S1期1554-1558,共5页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学青年基金项目(No.50909030)
深圳市龙岗区软科学研究项目(深龙科[2011]3)
中国水利水电科学研究院科研专项(岩集1238)
关键词
海上风机
重力式基础
锚杆
三维有限元分析
offshore wind turbine
gravity foundation
anchor
three-dimensional finite element analysis.
