Steel structure design of high-speed railway station

 The high speed railway station has a novel shape, and the structure above the ground adopts steel structure and the overall scheme of steel structure + space frame is adopted. In order to realize the design concept of "displaying the natural beauty of the structure", the structural main station adopts the construction and bridge integration structure system according to the requirements of the building facade and the interior decoration effect. The structural system of "A column +Y column + straight column supported catenary steel truss roof "is designed. The tilt Angle of the west leg of pillar A is consistent with the elevation Angle of the building, which cleverly integrates the structural members into the building facade and provides effective lateral force and vertical support for the structural system. Y-pillar provides a more spacious and comfortable space for the waiting hall, enriches the interior visual effect, and reduces the structural span of the two-span main truss of the roof, providing vertical support for the roof structure. The vertical columns achieve the effect of the eastern facade of the building, while providing vertical support for the roof structure system; Catenary main truss beam avoids the increase of cost and construction difficulty caused by secondary structure finding.

This structure system combines construction and bridge, and the system is unique. The concrete structure is below the rail layer, and the steel structure is above the rail layer. The damping ratio of the two structural materials is different, and the lateral stiffness of the upper and lower parts is sudden change. There is a large empty area over the entrance hall of the main station, and the waiting floor is discontinuous. The commercial interlayer is a transfer structure with discontinuous vertical components. The maximum span of the steel structure roof is 84 m, the maximum roof overhang is 18 m, and the maximum height of the building is 43 m. This project is A complex combined structure, so three structural systems are compared (scheme 1: A column at both ends + space frame; Scheme 2: A column at both ends + two columns in the middle + space frame; Scheme 3: A column at both ends + Y column at the east side + truss), after adopting the seismic performance design, the dynamic elastic-plastic analysis of the structure is carried out by using ABAQUS model, the comfort level of vehicle-induced vibration is analyzed by using ANSYS model, and the key nodes are analyzed by finite element method to provide reliable theoretical support for the safety and economy of the structure.