双轴受压螺栓连接钢管节点的受力性能试验与有限元分析  

Experimental study and FEM analysis on mechanical behavior of a steel tubular joint with bolted connection subject to biaxial compression

作　　者：陈勇[1] 王激扬[1] 郭勇[2] 沈国辉[1] 杨骊先[1] 孙炳楠[1] 

机构地区：[1]浙江大学,浙江杭州310058 [2]浙江省电力设计院,浙江杭州310012

出　　处：《土木工程学报》2013年第S2期219-224,共6页China Civil Engineering Journal

基　　金：国家科技支撑计划课题(2012BAJ13B04)

摘　　要：各国现行钢结构规范中,对螺栓连接钢管节点的极限承载力均未提及详细的构造措施及计算方法。因此,本研究通过对一双向受压螺栓连接钢管节点的承载力试验及有限元模拟,探讨了该类节点的承载力-变形曲线和破坏模式,并对环板、主管的应力-应变情况进行了分析。研究表明,采用环板、十字连接板对支管与主管进行螺栓连接并设置加劲肋的钢管节点,其破坏模式为环板局部面外失稳,设置加劲肋能有效抑制整体的面外失稳;其次,应用有限元模拟需考虑初始缺陷的影响,所得承载力略高于设计值,可以有效预测该类节点的受力性能及破坏模式。In the current steel design code,the ultimate strength of a steel tubular joint with bolted connection has not been specified in detail.In this paper,the failure mode and the load-displacement behavior of a full scale steel tubular joint with bolted connection subject to biaxial compression were investigated.Moreover,the strain distribution of annular plate and chord member in different loading stage,such as design strength stage and ultimate strength stage,were also discussed.It results that the failure mode of the steel tubular joint with bolted connection is local buckling and the rib stiffener may effectively prevent the out-of-plane buckling of whole joint.Taking account of the impact of initial imperfection,FEM analysis is able to predict the mechanical behavior and the failure mode of such tubular joint well,and the ultimate strength obtained by FEM analysis is slightly higher than experimental value.

关 键 词：双轴受压 螺栓连接 钢管节点 受力性能 

分 类 号：TU392.3[建筑科学—结构工程]