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为研究网架与网壳等空间结构中常用的半刚性Socket节点在纯弯和压弯荷载作用下的受力性能,完成了3个Socket节点试件在纯弯荷载作用下的试验和6个Socket节点试件在不同比例的压弯荷载作用下的试验,并将节点在纯弯荷载和压弯荷载作用下节点的受弯承载能力进行了比较。在此基础上,提出了节点弯矩-转角曲线的简化模型。研究表明:Socket节点在纯弯荷载和压弯荷载作用下都表现出了较好的弯曲承载力和延性;节点在压弯荷载作用下的初始弯曲刚度和屈服弯矩要高于其在纯弯荷载作用下的初始弯曲刚度和屈服弯矩;节点的初始抗弯刚度随着压弯荷载比例的增大而增大;对于以Socket节点连接的空间结构,采用纯弯荷载作用下得到的节点抗弯刚度计算结构的承载力偏于保守。
In order to study the mechanical behavior of semi-rigid Socket joints commonly used in space structures such as grids and reticulated shells under pure bending and bending load, the tests of three Socket joints under pure bending load and six Socket joints were tested under different percentages of bending and bending loads. The flexural load carrying capacity of the joints under pure and buckling loads was compared. On this basis, a simplified model of node moment-rotation curve is proposed. The results show that Socket nodes show good flexural capacity and ductility under both pure bending and bending loads. The initial flexural rigidity and yielding moment of joints under flexural load are higher than those under pure bending Initial bending stiffness and yielding moment under load; the initial bending stiffness increases with the increase of bending-bending load ratio; for the space structure connected by Socket nodes, the node resistance obtained under pure bending load Bending stiffness calculation structure of the load capacity is conservative.