钢管输电塔K节点承载力算法的优化研究

Optimization of K-joint joint bearing capacity algorithm for steel tube transmission tower

我国现行规范给出的K型节点承载力算法的计算结果均与钢材屈服强度成线性关系,未考虑K节点的弹塑性稳定破坏问题。利用有限元仿真分析了屈服强度对节点承载力的影响,给出了K节点承载力公式的优化方法,该方法采用最大承载力和最大变形双重控制的方法来确定它的承载力,仿真结果表明:优化后的算法更符合有限元计算结果,可以服务于钢管塔节点设计。

The calculation results of the bearing capacity algorithm of K-joint in current regulationsin China are linear with the yield strength of steel,but the elastoplastic failure of K-joint is not considered.In this paper,the influence of yield strength on the bearing capacity of K-joint is analyzed by finite element simulation,and the optimization method of bearing capacity formula of K-joint is given,which use the method of maximum bearing capacity and maximum deformation to determine its bearing capacity.The simulation results show that the optimized algorithm is more in line with the finite element calculation results and can serve the design of steel tube tower joints.