厦门北站巨型混合框架结构设计与分析

Structural design and analysis on giant combination frame of Xiamen North Station

厦门北站屋盖是双向跨度为132m×220m的大跨抗震超限结构。工程结合建筑造型,沿屋脊设置两端支承于A形巨型塔柱上的大跨度立体钢桁架,在塔柱之间及塔柱与相邻柱间设置了箱形截面曲线预应力框架梁。钢骨混凝土巨型塔柱、大跨钢桁架及箱形预应力混凝土梁一起构成了大屋盖结构的抗侧力体系及主承重体系,形成了巨型混合框架结构体系。工程设计针对这种新型结构进行了静、动力弹塑性分析。为解决巨型钢桁架与钢骨混凝土巨型塔柱的连接问题,采用钢板及预应力筋的双重连接。巨型混合框架结构在工程中得到了成功应用。

The roof of Xiamen North Station is a seismic ultralimit structure with two-way span of 132m×220m.Considering architectural modeling,a long-span three-dimensional steel truss is constructed along the ridge.Each end of the truss is supported by A-shape giant tower columns.To ensure the stability of the tower column during the construction,the curved box-section prestressed concrete frame is located between the tower column and adjacent columns.The steel reinforced concrete giant tower column,long-span steel truss and box-section prestressed concrete beam together form the lateral force resisting system and the main bearing system of the roof structure,which is a giant composite frame structure.The static and dynamic elastoplastic analysis were carried out for the new structure.For solving the connection problem of giant steel truss and steel reinforced concrete giant tower column,the double-connection of steel plates and prestressed tendors is adopted.The giant combination frame of Xiamen North Station has achieved good results.