赖庆文，  周  卫，  杨通文，  陈获屹，  邓  曦
    （贵州省建筑设计研究院，贵阳 550002）

[摘要] 贵阳龙洞堡国际机场扩建项目航站楼结构复杂，根据建筑特点对楼面和屋盖结构体系进行了选择，对主要结构进行了分析，航站楼采用预应力混凝土技术解决超长大跨度结构未设温度缝的问题，屋面采用改进的网架结构，由树枝钢管柱和摇摆柱支承。通过有限元分析取得树枝钢管柱的计算长度，钢管柱与混凝土梁柱连接采用了钢筋机械连接的新型节点，钢管柱与网架连接采用了向心关节轴承铸钢铰接节点，基础设计解决了地貌起伏的岩溶山区高填方上基础设计施工困难的问题。
[关键词] 超长混凝土结构；预应力；网架；树枝钢管柱；钢管柱节点；钢筋机械连接；球铰节点
中图分类号：TU318    文献标识码：A  文章编号：1002-848X(2011) Sl-0755-07

Structural design of Guiyang Longdongbao International Airport expansion project
    Lai Qingwen, Zhou Wei, Yang Tongwen, Chen Huoyi, Deng Xi
    ( Guizhou Province Architectural Design and Research Institute,  Guiyang 550002,  China)

Abstract: The terminal building of Guiyang Longdongbao Intemational Airport expansion project is a complex structure. The methods of selecting the floor and roof structural system according to the arclutectural characteristics were presented, and the structural characteristics of main elements were analyzed. Prestress technology was adopted to solve critical engineering difficulties, such as large space of main structure, long span, super plane without expansion joints. The improved space truss system was applied to the roof,wluch was supported by dendritic steel tubes and swing columns.  It is advised to determine the magnitude of effective length coefficient through finite element methods.A new type of steel tubes joint with rebar mechanical splicing was adopted to connect the RC beams and columns. The articulated joint with radial spherical plain bearing was adopted to connect dendritic steel tubes, swing columns and space truss. Design measures had been applied to solve the difficulties of the pile foundations with terrain fluctuation and dee Pfill in karst mountainous area.
Keywords: super-long reinforced concrete structure; prestress; space truss; dendritic steel tubes; steel tubes joint; rebar mecharucal splicing; articulated joint