大跨越钢管塔K型节点滞回性能分析

The Analyses on Hysteretic Performance of K-type Node in Large Span Steel Tubular Tower

应用Abaqus软件对大跨越钢管塔中常见的K型节点进行了抗震性能数值试验研究,分析了主、支管直径、节点板厚度、主管轴心压力、连接插板厚度及支管间隙尺寸等不同参数变化对K型节点抗震性能的影响,得到了节点的滞回性能曲线、骨架曲线和耗能能力。研究表明:钢管节点本身具有良好的抗震性能;当主管轴向压力增大时,节点抗震性能下降明显,节点因应力集中易发生破坏;增加主、支管直径和节点板厚度对提高圆管节点抗震性能效果较显著;支管间隙尺寸对节点滞回性能改良效果不明显。

This paper used Abaqus software to make numerical experimental studies on the seismic performance of the common K-type node in large span steel tower.It analyzed different parameters of the pipes diameter,axial pressure of the main pipe,thickness of the connection plate and gap dimension. At last,it obtained the hysteresis curves,skeleton curves and energy dissipation capacity,received the influence of these parameters on seismic performance of the node.Research shows that the steel pipe node itself has a good seismic performance.When the axial pressure increases,the seismic performance is significantly decreasing. The node prone to fail because of stress concentration. Increasing the main and branch pipe diameter and node plate thickness all can significantly improve the seismic performance the node.The effect of branch pipe gap size on node hysteretic performance improvement is not obvious.