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平面KK型相贯节点是网壳结构中常见的节点形式,对平面KK型相贯节点支管在轴力、平面内弯矩、平面外弯矩共同作用下的极限承载力进行了足尺试验研究,分析了节点加载过程中应力发展过程及位移变化规律。结果表明,对支管施加偏心荷载能够有效地模拟节点承受轴力、平面内弯矩、平面外弯矩的共同作用。主管的局部屈曲是平面KK型相贯节点的破坏模式之一。采用规范Eurocode 3中K型节点在轴力、平面内弯矩和平面外弯矩共同作用下的公式对支管承受轴力、平面内弯矩、平面外弯矩共同作用的平面KK型相贯节点进行验算是可行的,验算结果表明,节点是安全的且偏保守。
The planar KK-type cross-joints are the common node forms in the reticulated shell structure. The full-scale experimental study on the ultimate bearing capacity of the cross-section KK-type cross-joints under axial force, in-plane bending moment and out-of-plane bending moment The stress development process and the variation of displacement during node loading are analyzed. The results show that the application of eccentric load to the branch pipe can effectively simulate the joint action of the node bearing axial force, in-plane bending moment and out-of-plane bending moment. The local buckling of the supervisor is one of the failure modes of the planar KK-type intersecting nodes. The plane KK-type cross-connection node which is used to regulate the joint deformation of K-joints under axial force, in-plane bending moment and out-of-plane bending moment under the joint action of axial force, in-plane bending moment and out- It is feasible to carry on the checking, the checking result shows that the node is safe and partial conservative.