国家体育场焊接方管桁架单K节点试验研究.pdfVIP

第 28 卷第 2 期 建 　筑 　结 　构 　学 　报 Vol28 ,No2 2007 年 4 月 Journal of Building Structures April 2007 ( ) 文章编号 2007 国家体育场焊接方管桁架单 K 节点试验研究 1 1 1 2 2 陈以一 , 李万祺 , 赵宪忠 , 范 　重 , 彭 　翼 ( 1 同济大学 土木工程学院 ,上海 200092 ; 2 . 中国建筑设计研究院 ,北京 100044) 摘要 :为考察构造复杂的国家体育场焊接方管桁架单 K 节点的受力性能和承载力 ,进行了两个典型节点的 1 ∶3 缩尺比例 的模型试验和有限元分析 。试验结果表明 ,节点强于杆件 ,节点的极限承载力都能达到设计荷载水平的 2 倍以上 ,且节 点区范围内的板件未观察到局部失稳或断裂现象 。有限元分析能较好地模拟试验现象 。试验结果和有限元分析结果证 明 ,节点区的板件局部加厚和内置加劲肋等加强措施是有效的。 关键词 :单 K 节点 ; 加劲肋 ; 极限承载力 ; 试验研究 ; 有限元分析 中图分类号 :TU3933 　TU3171 　　文献标识码 :A Experimental research on single Kjoint in roof truss with welded box section members used in the National Stadium 1 1 1 2 2 CHEN Yiyi , L I Wanqi , ZHAO Xianzhong , FAN Zhong , PEN G Yi ( 1. College of Civil Engineering , Tongj i University , Shanghai 200092 , China ; 2 . China Architecture Design and Research Group , Beij ing 100044 , China) Abstract : The behavior and ultimate capacity of single Kjoint in the roof truss with welded box section members used in the National Stadium were experimentally researched . Two specimens at onethird scale of their prototypes were tested under monotonic loadings , along with FEM analysis. The test results indicated that the joint was stronger than the connected members , and the ultimate capacity of the joints was about twice as large as the design load . Neither local buckling nor fracture of the plates in the joint