Abstract: Qinghe Station has a novel shape. Its west elevation is tilted upward, and the roof is high in the west and low in the east. In order to realize the design concept of "displaying the natural beauty of the structure", the main station building adopted the integrated structure system of bridge construction according to the requirements of building facade and interior decoration effect. The structure system of "A-column+Y-column+straight column supporting catenary steel truss roof" was designed. Among them, the inclination angle of the west leg of type A-column coincided with the building elevation angle, skillfully integrated the structural components into the building facade, and provided effective lateral force resistance support and vertical support for the structural system; Y-column strived for more spacious and comfortable use space for the waiting hall, enriched the indoor visual effect, and reduced the structural span of the two span main truss on the roof, which improved the roof structure for vertical support; vertical column achieved the effect of the east side of the building, while provided vertical support for the roof structure system; catenary type main truss beam avoided the cost increase and construction difficulty caused by the secondary structure finding.
This structural system has the advantages of integration of bridge construction, unique system. Which are concrete structure below the rail bearing layer and steel structure above the rail bearing layer. The damping ratio of these two structural materials was different. There was a sudden change in the lateral stiffness of the lower two parts. There was a large overhanging area in the entrance hall of the main station building area, and the floor slab of the waiting floor was discontinuous. The commercial interlayer was a transfer structure, and the vertical components were discontinuous. The maximum span of the steel roof was 84 m. The maximum roof overhanging was 18 m. The maximum height of the building was 43 m. This project was a complex composite structure. Based on the performance-based design, the dynamic elastic-plastic analysis of the structure was carried out by ABAQUS, and the vehicle-induced vibration comfort was analyzed by ANSYS. At the same time, the joint finite element analysis of key joints was carried out. The safety and economy of the structure was provided reliable theoretical support.