摘要
该文研究了Q690高强钢管塔柔性法兰极限承载力。为考察这种法兰的受力性能、破坏模式及螺栓的应力分布,以1000kV钢管塔上的连接法兰为背景,进行了2个法兰足尺试件试验。同时,对试验模型进行了非线性有限元数值分析。试验与有限元分析结果表明:所设计的高强钢柔性法兰受力合理,满足工程应用;节点的薄弱部位位于主材与法兰板连接处;对于高强钢法兰螺栓受力修正系数可适当减小,建议m取0.62;同时建议考虑钢管壁厚对节点承载力的影响。
A flexible circular bolted flange joint with Q690 high strength steel used in 1000kV steel tube towers is constructed. In order to investigate the performance, the failure pattern of the bolted flange joint and the bolt force, axial tension tests and nonlinear finite element analysis have been carried out on two full-scale flange specimens. Both experimental and FEM analytical results show that the flange used in a 1000kV steel tube tower is safe, and has an adequate safety reserve. The weakest part of this joint is a connection location between a tube and a flange plate. It is recommended that the value of this flexible flange bolt load correction coefficient m should be 0.62, and the thickness of the tube should be taken accounted for calculating the ultimate bearing load.
出处
《工程力学》
EI
CSCD
北大核心
2013年第3期206-213,238,共9页
Engineering Mechanics
关键词
钢管塔
柔性法兰
节点
试验
极限承载力
steel tube towers
flexible flange
joint
experiment
ultimate bearing capacity
