双向荷载作用下焊接球节点刚度的有限元分析  

FEM Analysis of Stiffness of Welded Spherical Joint Under Bi-directional Loads

作　　者：王凡[1] 王星[1] 孙晨辉[2] 

机构地区：[1]宁波工程学院,浙江宁波315016 [2]浙江工业大学,浙江杭州310014

出　　处：《宁波工程学院学报》2015年第2期15-19,共5页Journal of Ningbo University of Technology

基　　金：宁波市自然科学基金(2013A610198)

摘　　要：节点刚度对大跨度空间网格结构的稳定极限承载力性能具有重要的影响。针对工程中焊接球节点处于双向受力甚至空间多向受力状态,本文选取了四管正交且双向荷载作用下的球节点进行了有限元分析。主要考察分析了一个方向的轴向对称荷载对另一正交方向的球节点刚度的影响情况,为考虑节点刚度的大跨度空间网格结构稳定极限承载力分析提供依据,得出了可应用于工程实践的重要结论。The stiffness of the joint has the important effect on the stability ultimate bearing capacity of large-span spatial reticulated shell. In practical projects, joints are usually subject to bi- directional and even multi-directional forces. In this paper, finite element analyses are carried out for the simplest four-tube orthogonal joints under bi-directional loads. Through analyzing the change of the stiffness and investigating how the stiffness of one axial joint influences the other, some important conclusions are obtained, which can provide theoretical foundation for the stability ultimate bearing capacity analysis considering joint stiffness and the conclusion can be applied to the practical design.

关 键 词：节点刚度 加肋焊接空心球 回归分析 稳定极限承载力 

分 类 号：TU356[建筑科学—结构工程]