(奥雅纳工程咨询（上海）有限公司， 上海 200031)

［摘要］吴江交通枢纽项目包含枢纽主楼和住宅区共5座塔楼，其中枢纽主楼建筑造型新颖独特，且建筑空间关系相对复杂，主体结构采用3层框架结构。中庭区域结构体型复杂，为大跨度空间悬挑桁架及吊挂结构，其中悬挑桁架大跨长度约40m，悬挑长度约22m，通过吊柱支撑2层与3层局部建筑。采用性能化方法对该结构进行抗震设计，利用YJK及LS-DYNA软件，从大跨度空间悬挑桁架、大跨悬挑桁架区域楼板、桁架与周边结构连接节点及2层及3层悬挑吊柱结构设计及振动这四个方面阐述了其设计思路和分析过程。对于分析过程中的技术难点，提出了相应的解决方案。分析结果表明，大跨悬挑桁架结构及吊柱结构设计安全可靠，抗震性能良好，能够满足规范要求。对悬挑结构及桁架下弦楼面采取了针对性加强及施工措施。 

［关键词］吴江交通枢纽；大跨空间悬挑桁架；吊柱；楼板开裂；节点设计 

中图分类号：TU318 文献标识码：A文章编号：1002-848X（2021）14-0034-05

Cantilever structural design of main building of Wujiang Transportation Hub 

KONG  Qiming,  DAI  Dan 

(Arup International Consultant (Shanghai) Co., Ltd., Shanghai 200031， China) 

Abstract: Wujiang Transportation Hub project includes a total of 5 towers including  hub main building and  residential towers. The main building of the hub has a novel and unique architectural shape, and the spatial relationship of the buildings is relatively complex. The main structure for the hub main building adopts a three-story frame structure. The structure of the atrium area  is complex. It is a large-span spatial cantilever truss with hanging structure. The large-span length of the truss is about 40m and the cantilever length is about 22m. The partial structures at 2-story and 3-story floors are supported by hanging columns. Performance-based method was used for the seismic design  by using YJK and LS-DYNA software. The design ideas and analysis process of the large-span spatial cantilever truss, the floor for the large-span cantilever truss area, the connection design of the truss and the surrounding structure, and the structural design for the 2-story and 3-story hanging columns and vibration for the slab were expounded.For the technical difficulties in the analysis process, corresponding solutions were proposed.  The analysis results show that the design of the large-span cantilever truss structure and the hanging column structure is safe and reliable, which has good seismic performance, and can meet the requirements of the code. The floors for lower chord of cantilever truss and hanging column structure area were strengthened by corresponding structural details and construction measures. 

Keywords:Wujiang Transportation Hub； large-span spatial cantilever truss； hanging column； floor cracking； connection design

作者简介：孔启明，硕士，一级注册结构工程师，Email:qi-ming.kong@arup.com;通信作者：戴丹，硕士，高级工程师，一级注册结构工程师，Email:dan.dai@arup.com。