首都国际机场T3号航站楼结构设计

北京首都国际机场T3航站楼是北京2008年奥运会的重点工程,南北总长约3 000m,东西宽750m,包括T3A,T3B航站楼和T3C国际候机厅,总建筑面积约100万m2。航站楼主体为钢筋混凝土框架结构,屋顶为曲面钢网架结构,支承屋顶悬臂结构的是锥形和梭形钢管柱。主要介绍在超大规模结构设计中遇到的关键技术问题,包括超长结构的混凝土收缩和温度变形、多点多维地震波输入分析、结构转换、超大面积屋顶的温度内力、新型节点的设计等问题。在试桩的基础上,桩基础采用桩底和桩侧后压浆技术提高承载力40%~50%。结构体系中大量采用清水混凝土技术。对超长混凝土结构设计从设计和施工两方面采取措施,分缝处采取了异形型钢混凝土柱。航站楼的主体钢网壳周边大量采用变截面圆形钢柱,给出了其在大震下的弹塑性分析结果和节点构造措施。

Structure Design of Beijing Capital International Airport Terminal 3

The Beijing capital international airport T3 is an extension project for Beijing Olympic Games in 2008,the length between north and south is about(3 000) meters,the max width between east and west is about 750 meters.The area of the entire T3 new airport is approximately 1.0 million square meters,and is eivided into four parts T3A,T3B,T3C and GTC.The main structure of the T3 is the reinforced concrete frame construction,the roof is the space frame structure,and the roof is supported by the variable cross-section steel pipe column which extends to the building surface or peripheral inclines to outside.The essential technology,application characteristic and analysis of the design and construction method are introduced.