预加轴力下内置加劲环K型管节点抗冲击性能有限元模拟  

Finite Element Simulation of Impact Performance of Axially Preloaded Tubular K-joint with Inner-Stiffened Ring

作　　者：赵光明 崔安稳 曲慧[1] ZHAO Guang-ming;CUI An-wen;QU Hui(School of Civil Engineering Yantai University,Yantai 264005,China)

机构地区：[1]烟台大学土木工程学院,山东烟台264005

出　　处：《烟台大学学报（自然科学与工程版）》2018年第2期164-170,共7页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：国家自然科学基金资助项目(51478407)

摘　　要：采用有限元软件Abaqus建立了主管一端固定一端滑动,支管铰接,同时对主管和支管预先施加轴力的内置加劲环K型管节点有限元分析模型.研究采用内置加劲环的加强方法对遭受横向冲击荷载作用的K型管节点抗冲击性能的影响.分析结果表明:加劲环的存在显著减小了主管的局部凹陷和主支管相贯线处凹陷变形;增大了主支管的线刚度比,使支管变形增大;同时加劲环的加强作用对节点的最终能量耗散影响很小.FE models are established using software Abaqus to analyse the dynamic performance of axially preloaded tubular K-joint with inner-stiffened ring,whose brace is hinged at both ends and chord is fixed at one end,while sliding at the other end.The aim is to study the effect of inner-stiffened ring on impact performance of tubular K-joint.The analysis results show that the existence of the stiffened ring significantly reduces the local dent of chord and the depressed deformation at intersecting line between chord and brace,line stiffness ratio of chord to brace is increased to enlarge the deformation of brace.The reinforcement of stiffened ring has little effect on capacity dissipation of joints.

关 键 词：K型管节点 抗冲击 支管铰接 内置加劲环 轴压比 线刚度 

分 类 号：TU398[建筑科学—结构工程]