偏心节点钢管塔的受力分析和设计建议

Mechanical Analysis and Design Suggestions of Steel Tubular Tower with Eccentric Joint

摘要: 钢管塔主材与斜材常采用K型节点连接板连接，规范要求斜材与主材的形心线尽可能交汇于一点，当杆件夹角较小时，其节点板尺寸较大，造成节点重量增大和塔身挡风面积的增加，而采用偏心节点将减小节点板尺寸。建立了偏心节点钢管塔的有限元整体模型，分析了偏心节点对主材和斜材受力性能的影响，结果表明偏心节点对铁塔受力影响较小。最后给出了偏心节点钢管塔的设计建议，为其工程应用和理论研究提供参考。

Abstract: The K type connecting plate is used for connecting main member and brace member of steel tubular tower. The centroid of members shall intersect at one point as much as possible. The weight of joint and wind area of tower were increased for the large connecting plate due to small included angle between main member and brace member. The size of the connecting plate will be reduced when using the eccentric joint. The entire finite element model with eccentric joint was employed to study mechanical behavior of main member and brace member. The results shown that mechanical behavior of main member and brace member were less affected by eccentric joint. The recommended design method of steel tubular tower with eccentric joint was proposed and the results can be used as a reference for engineering application and theoretical study.