摘要
针对陆上风机基础存在的承台裂缝、防水破坏、基础环溢浆等问题,利用传统二维有限元对基础应力分析过于简化。采用三维有限元方法并考虑了钢筋与混凝土的耦合作用,对风机基础的受力情况进行分析。结合有限元方法模拟的结果及风机基础破坏资料,得出风机基础破坏的原因主要是在基础环和混凝土连接的底部及表面环内连接区域产生应力集中区,应力集中区混凝土产生损伤破坏进而产生表层的承台裂缝、防水破坏。在受力分析的基础上对防止基础破坏提出了有针对性的加固方法。
In view of the problems existing in the wind turbine foundation,such as cracks in the cap,water-proof failure and overflow of foundation ring,the predigested 2D FEM can not reveal the stress distribution completely.The 3D FEM was adopted to simulate the stress distribution of the wind turbine foundation,considering the coupling effect between steel and concrete.Based on the results of FEM simulation and the detection data of damage of the wind turbine foundation,it is concluded that the main reason for the damage of the wind turbine foundation is the stress concentration zone at the bottom of the foundation ring and the connecting area of the surface ring,and the damage of the concrete in the stress concentration zone leads to the crack and waterproof.On the basis of result data,the pertinent reinforcement method is put forward to prevent foundation damage.
作者
迟洪明
史卜涛
Chi Hongming;Shi Butao(Long YuanBeijingWind Power Engineering&Consulting Co.,Ltd.,Beijing 100034,China)
出处
《建筑结构》
CSCD
北大核心
2019年第A01期1015-1018,共4页
Building Structure
关键词
风机基础
加固
三维有限元
wind turbine foundation
reinforcement
3D FEM
