STRUCTURAL LAYOUT AND SEISMIC ANALYSIS OF THE SPHERICAL EXHIBITION CENTER IN SUZHOU HIGH SPEED RAILWAY NEW CITY

Spherical structure is a difficulty in construction design, especially for the hybrid structure with external spherical space grid structure and internal multi-layer irregular system which are few cases at present. The basic layout and seismic analysis of the spherical Exhibition Center of Suzhou high speed railway new city was introduced. The special-shaped curved surface of the structure adopts the steel structure bidirectional cross space grid structure system; the horizontal lateral resistance system adopts the steel frame concrete shear wall system with four core tubes and circular steel tube columns; in the vertical bearing system, the horizontal floor beam adopts the steel beam, the secondary beam adopts the steel reinforced concrete composite beam, and the floor adopts the steel truss floor bearing plate; in order to meet the needs of large space development from one to three floors Hall function, 3.5 m high steel truss is set to hang the frame column and floor of the lower seven floors. Through the simulation of small, medium and rare earthquakes, the overall safety of the structure is analyzed, and the key components such as shear wall, suspension truss, steel cover and key joints of truss suspension are specially analyzed. All indexes meet the requirements, and the purpose of structural seismic design is achieved.