输电塔K节点极限承载力影响因素分析

Analysis on Influence Factor on Ultimate Bearing Capacity of K Node of Power Transmission Tower

为研究输电钢管塔及钢管角钢组合塔节点的特性,采用有限元软件ANSYS建立输电钢管角钢组合塔K节点三维实体模型,分析K节点的三种破坏模式以及角钢长度、角钢厚度和节点板长度对K节点极限承载力的影响。结果表明:输电钢管角钢组合塔K节点的极限承载力随着节点板和角钢厚度的增加而显著增大,在设计时角钢厚度不宜小于10 mm;输电塔K节点的极限承载力受节点板长度、角钢长度的影响较小。

In order to study characteristics of nodes of power transmission steel tube tower and steel tube angle combined tow-er,finite element software ANSYS was used to establish a 3D entity model of K node of power transmission steel tube angle combined tower. Influence on ultimate bearing capacity of K node by three failure modes of K node,length and thickness of steel angle and length of node plate was analyzed. The results indicates that ultimate bearing capacity of K node of power transmission steel tube angle combined tower obviously increases with increase of thickness of node plate and steel angle. Secondly,thickness of the steel angle is not suitable to be less than 1 0 mm in design. Influence on ultimate bearing capacity of K node by length of node plate and steel angle is small.