客运中心管桁架的结构设计  

Structural Design of Steel-pipe Truss for Passenger Station

作　　者：邬喆华[1] 何丽波 许国平 周泓 刘中华 

机构地区：[1]同济大学土木工程学院,上海200092 [2]宁波市建筑设计研究院科研所,浙江宁波315012 [3]浙江精工钢结构有限公司,浙江绍兴312000

出　　处：《宁波大学学报（理工版）》2006年第3期330-333,共4页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：中国博士后科学基金(2005037512)

摘　　要：根据空间有限元建模计算,探讨了多跨的钢管桁架结构体系的天台客运中心候车大厅屋盖的结构布置、计算模型的对比.分析表明采用倒三角形截面的管桁架在平面外稳定性较弱,在设计中应通过增设横向和纵向支撑来形成几何不变体系,否则应进行平面外的稳定分析.管桁架的设计计算应考虑与下部结构共同作用,同时应反映施工对结构内力的影响.管桁架的计算模型中采用刚性节点与弹性节点对内力的影响不大.Steel-pipe truss is characterized with definite load condition, simplified calculation modeling, simple construction, and economical cost of steel, etc, so it is a preferred structure form that are commonly used in large span structure. In this paper, the steel roof with multi-span of the Tiantai passenger station is used as a case study, and a computer model of space structure of the steel roof is established using finite element method. Through structure arrangement, calculation model comparison and joint design, it is shown that steel-pipe truss applied with inverse triangle section has compromised stabilization. In this case, additional lateral and longitudinal braces are needed to form invariant geometric system. The combined action of steel roof with inferior concrete structure should be considered, so the influence of construction can be reflected by structure＇s internal force. The non-rigid effect of joints in the computer models is not significant and may be ignored.

关 键 词：管桁架 结构设计 有限元 

分 类 号：TU318.1[建筑科学—结构工程]