(广东省建筑设计研究院，广州510010)
［提要］广州白云机场东三、西三指廊为一期扩建工程项目，结构设计上作了较大的改进。指廊钢屋盖采用了预应力拉索拱形钢管桁架，有效地减小了桁架的结构高度，改善了桁架的内力分布。桁架支座节点采用了铸钢节点，既满足了复杂的受力要求，又达到了较好的建筑效果。
［关键词］白云机场一期扩建；指廊；预应力；拱形桁架；拱架；铸钢节点
Structural Design of Guangzhou New Baiyun Airport East Ⅲ and West Ⅲ Airside Concourses/Liao Xuzhao (The Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China)
Abstract: The east Ⅲ and west Ⅲ airside concourses are parts of the phase I extension project of Guangzhou new Baiyun airport. There is great improvement in structural design. Prestressed arch truss is applied to the roof of the airside concourses. The prestressing force and the archshape make the internal force of main truss more uniformity，and the structure depth of main truss is reduced. Cast steel is adopted in the joints, which brings satisfying solution to the problems of complicated structure and forces, and makes the architectural effect of the joints more pleasing.
Keywords: Baiyun airphort phase Ⅰ extension; airside concourse; prestressing force; arch truss;arch; cast steel joint