平面KK型足尺相贯节点极限承载力试验研究
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(南京工业大学土木工程学院， 南京 211816)
［摘要］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。［关键词］平面KK型相贯节点; 轴力; 弯矩; 极限承载力; 足尺试验中图分类号：TU391，TU393.3 文献标识码：A 文章编号：1002-848X(2015)22-0075-05
Experimental research on ultimate capacity for plane full-scale KK-typed penetration jointMei Liang, Huang Bingsheng, Shao Qijun, Liang Zenan, Ma Qianli, Guo Fei, Qian Yong′an(College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China)Abstract: Plane KK-typed penetration joint is a common joint form in spatial reticulate shell structures. Full-scale experimental study was carried out on the ultimate capacity of the branch pipe for plane KK-typed penetration joint under the combined actions of axial force, in-plane moment and out-plane moment. The stress developing process and displacement variation law of the joint were analyzed in the loading process. Results show that the combined actions of axial force, in-plane moment and out-plane moment on the joint can be effectively simulated by the eccentricity loading on the branch pipe. The local buckling of the main pipe is one of the failure modes of the plane KK-typed penetration joint. It′s feasible to check the plane KK-typed penetration joint with branch pipe bearing the combined actions of axial force, in-plane moment and out-plane moment according to the formula in Eurocode 3 for K-typed joint under the combined actions of axial force, in-plane moment and out-plane moment. Checking results show that the joint is safe and conservative.Keywords: plane KK-typed penetration joint; axial force; moment; ultimate capacity; full-scale experiment
通讯作者：黄炳生，博士，教授，硕士生导师，Email：hsah8@126.com。
