【摘要】 福州长乐国际机场交通中心(GTC)是集轨道交通、商业、地空换乘于一体的复杂超限高层建筑，其结构设计面临抗震性能、超长混凝土裂缝控制及轨道交通共构等多项技术挑战。系统阐述了GTC的结构体系、抗震设计策略及创新技术应用。GTC结构采用防屈曲约束支撑(BRB)+混凝土框架体系、弦支拱壳及桁架组合钢结构屋盖构成的混合结构体系，通过弹塑性时程分析、地空一体化沉降控制分析等精细化数值模拟，验证了罕遇地震作用下结构的安全性与经济性，以及上部结构对轨道工后沉降影响的可控性。研究结果表明:采用BRB显著提升了结构的耗能能力，支承屋盖的型钢混凝土柱在中震作用下保持弹性，大震损伤因子低于0.3。屋盖采用弦支拱壳结构，实现了建筑美学与结构受力性能的高度统一。超长混凝土结构通过设置加宽后浇带与补偿收缩技术等有效抑制了温度裂缝。更多还原

【Abstract】 Fuzhou Changle International Airport ground transportation center( GTC) is a complex out-of-code high-rise building integrating rail transit,commercial facilities and ground-air transfer. Its structural design faced multiple technical challenges,including seismic performance,crack control in ultra-long concrete structures and co-construction with rail transit systems. The structural system,seismic design strategies and innovative technologies applied in the GTC were systematically elaborated. A hybrid structural system was adopted,consisting of buckling-restrained braces( BRB) with a concrete frame system,and a steel roof combining cable-supported arch-shell with trusses. The safety and economy of the structure under rare earthquakes and the controllability of the influence of the superstructure on the post-construction settlement of the track were verified by fine numerical analysis such as elastic-plastic time-history analysis and ground-air integrated settlement control analysis. The results show that the use of BRB significantly improves the energy dissipation capacity of the structure. The steel reinforced concrete columns supporting the roof remain elastic under moderate earthquakes,and the damage factor under rare earthquakes is less than 0. 3. The roof adopts the cable-supported arch-shell structure,which realizes the high unity of architectural aesthetics and structural mechanical performance. Temperature cracks were effectively suppressed in ultra-long concrete structure by setting widened post-pouring belt and shrinkage compensation technology.更多还原