苏州高铁新城椭球形会展中心结构布置与抗震分析

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

椭球形结构是建筑结构设计中的难点,特别是包含外部椭球形空间网格结构和内部多层不规则体系的混合结构,目前案例还比较少。介绍了苏州高铁新城椭球形会展中心结构基本布局和抗震分析。结构异形曲面外罩采用钢结构双向交叉空间网格结构体系;水平抗侧力体系采用四个核心筒加圆形钢管柱的钢框架-混凝土剪力墙体系;竖向承重体系中水平楼面梁采用型钢梁,次梁采用型钢-混凝土组合梁,楼板采用钢筋桁架楼承板;为了满足一~三层大空间的展厅功能,设置3.5 m高钢桁架用于悬挂下部7层的框架柱及楼面。对多遇地震、设防地震和罕遇地震下的结构整体安全性进行模拟分析,并且对剪力墙、悬挂桁架、钢外罩等关键构件和桁架悬挂关键节点进行了专门分析,各项指标均满足要求,达到了结构抗震设计的目的。

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.