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当应用于大跨度、超大跨度空间结构时,新型KKX型空心直管锥头节点不仅可以节约钢材,同时又利于腹杆与弦杆的相贯焊接.该节点核心区由节点管、空心切头锥两部分组成.本文采用ANSYS参数化分析了节点管直径及其壁厚、弦杆直径及其壁厚、腹杆直径及其壁厚对节点承载力的影响.分析表明:节点管、腹杆的直径及其壁厚对节点承载力有显著影响,弦杆2的直径及其壁厚、弦杆3及弦杆4的壁厚对节点承载力影响较小,建议设计时弦杆2取较小的直径,弦杆2、弦杆3及弦杆4取较薄的壁厚.最后通过多元线性回归拟合了节点承载力设计公式,为工程实践提供参考.
When applied to large-span and large-span space structure, the new KKX hollow straight pipe taper node can not only save steel, but also facilitate the web welding of web and chord.The core of this node consists of node pipe, Cone.This paper uses ANSYS parametric analysis of node tube diameter and wall thickness, chord diameter and wall thickness, web diameter and wall thickness of the node bearing capacity.The analysis shows that: node tube, web Diameter and wall thickness have a significant impact on the bearing capacity of the node. The diameter and wall thickness of chord 2 and the wall thickness of chord 3 and chord 4 have little effect on the bearing capacity of the node. Small diameter, chord 2, chord 3 and chord 4 take a thin wall thickness.Finally, the design formula of joint bearing capacity is fitted by multiple linear regression, which provides reference for engineering practice.