摘要
铸钢节点造型美观、受力性能合理,在建筑结构中得到了越来越广泛的应用.与传统焊接管节点相比,铸钢节点用圆形倒角取代了相贯线处的焊缝,应力集中小,承载力高.本文针对T型铸钢节点,通过So lidw orks软件建立三维模型,采用通用有限元软件AN SY S进行非线性分析.结合有限元计算结果,对T型铸钢节点的轴向承载力进行了参数分析,给出了T型铸钢节点在支管受轴力作用下的极限承载力公式.该公式确立了极限承载力与铸钢节点几何参数之间的关系.在焊接管节点几何参数的基础上,铸钢节点增加了由C.D.Edw ards首次提出的倒角系数.本文重点讨论了该系数对铸钢节点承载力的影响.
Cast tubular joints are widely applied in bridges, high-rise and industrial constructions, because from a structural and aesthetic point of view they are superior to directly welded joints. Cast tubular joints have lower stress concentrations and higher ultimate loading capacity than welded joints because they have better shapes of fillet and no welds in the critical areas. In this paper parametric analysis of cast T-joints is performed. The geometry model was established using Solidworks. Non-linear analysis was carried out using the commercial finite element programme Ansys. Based on the results of finite equations of ultimate loading capacity of T-joints under axial loading are derived element analysis. The relation ship of the ultimate loading capacity in cast tubular joints with the geometric parameters has been determined. Besides the parameters which governing the stresses in welded joints, an additional parameter ρ that is defined by C. D. Edwards has been introduced to describe the size of fillet. The sensitivity of ultimate loading capacity of cast tubular joints to the parameter ρis also discussed.
出处
《空间结构》
CSCD
北大核心
2006年第2期39-43,共5页
Spatial Structures
关键词
铸钢节点
极限承载力
非线性
有限元
cast tubular joints
ultimate loading capacity
non-linear analysis
finite element
