主管加内套管的加强K型搭接节点滞回性能研究

Study on the Hysteretic Performance of Reinforced K-type Overlapping Node in the Main Pipe and Inner Sleeve

为了研究主管局部加内套管的加强K型搭接节点的滞回性能,采用有限元分析软件ANSYS设计了K型搭接节点有限元分析模型,对节点2个支管同时施加轴向负相关低周往复荷载,得到节点的破坏模式、滞回曲线和骨架曲线,分析节点的承载性能和耗能性能,进而评价节点的抗震性能。结果表明:未加强K型节点主要以主管塑性破坏为主,而加强节点主要开始于支管屈曲破坏;主管局部加内套管的加强方式使得节点承载力可提高30%左右,但对搭接节点的耗能影响不大。

In order to study on the hysteretic performance of reinforced K-type overlapping node in the main pipe and inner sleeve,the author will make use of software of finite element analysis ANSYS and design K-type overlapping node finite element analysis model to exert the axial negatively correlated low-cycle load on two branch pipes,as a result,get the failure mode,hysteretic curve and skeleton curve of node,then,analyze the load-carrying performance and energy performance of node,finally,evaluate its anti-seismic property.The results show that the unreinforced K-type node is based on the plastic failure of main pipe,but,the reinforced node begins with the buckling destruction of branch pipe;Although the reinforcement mode(namely,main pipe and inner sleeve)can enhance the node bearing force for 30%,it has less impact on the energy dissipation of overlapping node.