相贯节点桁架网格结构的受力特性与有限元分析模型  

The Mechanical Characteristics and Finite Element Analysis Model of Space Frame Structure with Tubular Joints

作　　者：黄政华[1] 周丽霞[2] 梁健[2] 

机构地区：[1]贵州大学建筑与城市规划学院,贵州贵阳550025 [2]贵州大学土木工程学院,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2017年第1期72-76,共5页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金资助项目(5136009);贵州省自然科学基金项目(黔科合J字[2011]2321号);贵州大学博士基金资助项目(2010043)

摘　　要：相贯节点桁架网格结构通过钢管相贯节点将钢管桁架正交连接,形成空间网格结构,具有杆件、节点数量少,外形简洁美观的优点,越来越多地应用在一些大型公共建筑屋盖结构中。相贯节点的受力特性与普遍采用的铰接节点和刚接节点假定差异较大。因此,在整体分析模型中必须考虑节点域受力特性的影响才能得到较为精确的分析结果。从适用于工程应用的角度,提出简化弹簧-杆系有限元模型,采用非线性弹簧单元模拟节点半刚性、滞回性能对结构静力和动力特性的影响。Tubular joint space frame structure is made of plane tubular trusses connected with tubular joints,and has the advantages of less joints and beautiful appearance. There are more and more applications of this kind structure in roof structure of large public buildings.The mechanical characteristics of tubular joints are greatly different from assumption of pin joints or rigid joints. Therefore,a more accurate analysis result could be given by taking mechanical characteristics of joints zone into account in the whole analysis model. Simplified spring-beam finite element model was given for convenience in engineering application; nonlinear spring element was used to simulate the semi-rigid and hysteretic behavior influence of joints on the static and dynamic characteristics of the whole structure.

关 键 词：相贯节点 网格结构 有限元模型 弹簧单元 半刚性 滞回特性 

分 类 号：TU393.3[建筑科学—结构工程]