钢管混凝土管节点疲劳试验研究
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刁砚1，范文理2（1 西华大学建筑与土木工程学院， 成都 610039； 2 西南交通大学桥梁系， 成都 610031）［摘要］为深入研究钢管混凝土管节点的应力集中及疲劳性能，设计了钢管混凝土管节点的疲劳试验，并结合有限元的计算，对管节点的应力集中、疲劳裂纹的开裂源、裂纹扩展规律等疲劳相关特性进行了研究，对于变幅加载情况下的寿命进行了等效计算，并通过试验进行验证，在焊接接头良好的情况下，疲劳强度可达到较高的水平。［关键词］管节点； 疲劳试验； 有限元； 疲劳寿命中图分类号：TU392.3，U448.38 文献标识码：A 文章编号：1002-848X(2013)05-0045-03Experimental research on fatigue of tubular joints in concrete-filled steel tubeDiao Yan1, Fan Wenli2(1 School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, China; 2 Department of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, China)Abstract: For the further research on the stress concentration and fatigue property of tubular joints in concrete-filled steel tube, and the fatigue test was carried out, and the finite element was used to study the stress concentration, cracking source of fatigue, the rule of crack expansion and related features of fatigue. The life of changed load was calculated. The result verifies that the fatigue strength can achieve higher levels of performance if the welded joints are in a good condition.Keywords: tubular joint; fatigue test; finite element; fatigue life参考文献［1］范文理.管结构节点疲劳设计［C］//中国土木工程学会桥梁及结构工程学会第十四届年会论文集. 南京，2000.［2］袁慧芳.桥梁管道结构节点应力集中及疲劳寿命［D］.成都:四川大学，2000.［3］钱永久，蒲黔辉.钢管混凝土桁架的疲劳性能试验研究［C］//四川省公路学会桥梁员会98年桥梁学术讨论会论文集.成都，1998：86-90.［4］Department of Energy(Den). Offshore installations:Guidance on design and construction［S］.HMSO,UK,1984.［5］VAN WINGERDE A M, WARDENIER J, PACKER J A. Commentary on the draft specification for fatigue design of hollow section joints［C］//Proceedings of 8th International Symposium on Tubular Structures. Singapore. 1998：117-127.［6］International Institute of Welding (IIW). Recommended fatigue design procedure for hollow section joints: Part I-Hot spot stress method for hollow section joints. International Institute of Welding, Subcommission XV-E,IIW Doc.XV-582-85［M］.IIW Assembly, Strasbourg, France, 1985.［7］ANSI/AWS D1.1M—2008 Standard specification for welded highway and railway bridges［S］.American Welding Society,2008.
