摘要
矩形桁架节点区域容易出现主管管壁的局部屈曲与撕裂,采用槽钢对方钢管K型间隙相贯节点进行加强。采用ABAQUS有限元软件建立了21个有限元模型,对比了加槽钢与未加槽钢模型的计算结果,同时考察了支、主管宽度比,槽钢加强厚度与主管的厚度比,槽钢外延长度对节点承载能力的影响。有限元数值分析结果表明:选择适当尺寸的槽钢加强能够有效地控制主管区域内主管表面塑性失效以及主管侧面的压坏和局部屈曲的发生,同时增强节点的刚度与承载力。
The joint area of rectangle truss is prone to occur local buckling and tearing on the tube wall of the main tube. Channel steel was used to strengthen RHS gapped K-joint in this study. This paper established 21 finite element models by using the software ABAQUS,the models of channel steel reinforced type and common type were compared,and the influence of brace to chord side length ratio,reinforced plate to chord thickness ratio and channel steel extension length on the bearing capability of K-joint were discussed. The finite element numerical results showed that selecting an appropriate size of the channel steel could effectively control plastic failure on the chord surface,the compression failure on the sides of surface and local buckling,the stiffness and bearing stiffness of K-joint were improved.
出处
《钢结构》
北大核心
2016年第4期17-20,13,共5页
Steel Construction
关键词
钢结构
K型节点
有限元分析
槽钢
非线性
steel structure
K-joint
finite element analysis
channel steel
nonlinear
