垫板加强K型圆钢管相贯节点力学性能的有限元分析  

Finite Element Analysis on Mechanical Properties of Doubler Plate Reinforced Tubular K-Joints

作　　者：隋伟宁[1] 张信龙[1] 李帼昌[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2012年第6期1046-1053,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51108278);辽宁省教育厅项目(L210452);住房和城乡建设部项目(2010-K2-10)

摘　　要：目的研究垫板加强K型相贯节点中垫板的加强效果,为此类节点的应用提供理论基础.方法采用非线性有限元分析软件ABAQUS对两个支管分别承受拉力和压力作用的60个垫板加强K型圆钢管相贯节点构件进行数值分析,考察了不同垫板参数下垫板加强K型圆钢管相贯节点力-位移的关系,研究垫板长度和宽度对K型相贯节点极限承载力的影响.结果在主管和支管之间设置加强垫板改善了普通K型相贯节点的传力路径,提高了节点的极限承载能力和延性;增加垫板的长度不能提高节点的承载能力,只要满足焊接要求取δ=0.5 d就可以.增加垫板的宽度对节点的承载力的影响也可以忽略不计.结论在K型相贯节点上设置加强垫板可以提高节点的承载力,改善节点的应力集中现象.In order to study the strengthened characteristic and ultimate capacity of doubler plate on circular tubular K-joint,by different parameters δ（the ratio between the length of the doubler plate and the diameter of the brace） and α（the width of the doubler plate）.The finite element program ABAQUS is used to simulate the doubler plate reinforced tubular K-joints,and load-displacement relationship of the joints is calculated under different δ and α.Through these studies,between chord and brace,the ultimate bearing capacity of the ordinary tubular K-joints can be improved by setting up doubler plate,in the same way,the ductility can also be improved.Reasonable geometric parameter of the doubler plate can make the chord,brace and doubler plate work together to bear the external load.On the other hand,the variations of width and length parameter of doubler plate have no effect on the stiffness of the reinforced K-joints.The results also show that the plate reinforcement can improve the stress concentration property and increase the bearing capacity greatly.

关 键 词：钢结构 K型相贯节点 垫板加强 有限元分析 极限承载力 

分 类 号：TU395[建筑科学—结构工程]