（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］靖江市金融商务区连体双塔结构总高92-5m，连体跨度42m，为特大跨度的高位连体超限结构。主体双塔采用钢筋混凝土框架-剪力墙结构体系，连体采用钢桁架与次框架结构。根据结构特点采取了有针对性的加强措施，合理选取抗震性能化设计指标，分析了连体楼板及关键节点应力，对连体钢桁架进行抗连续倒塌设计，对整体结构进行大震弹塑性时程分析，对大跨度连体进行竖向舒适度分析。结果表明，结构能实现预设的抗震性能目标，并具有较好的竖向舒适度水准。

［关键词］双塔连体； 超限高层； 抗震性能化设计； 竖向舒适度； 抗连续倒塌

中图分类号：TU973+.14文献标识码：A文章编号：1002-848X(2016)17-0049-05

Structural design on out-of-code high-rise linked twin-tower building in Finance and Business Center in Jingjiang

Feng Yang, Gao Ming, Yan Dongqiang, Jing Zhitao, Li Huafeng, Xu Jinbei

(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:The 92-5-meter-high linked-twin-tower in Finance and Business Center in Jingjiang has 42-meter-span connections between towers. It is an out-of-code super-large-span high level connecting structure. The main twin-towers adopt reinforced concrete frame-shear wall structural system. Connecting structure adopts steel truss and sub frame structure. According to the characteristics of the structure, corresponding strengthening measures were taken. Performance-based seismic design indices were reasonably selected. The stresses of the connected floor and the key nodes were analyzed. Progressive collapse prevention design was conducted on connected steel truss. Elasto-plastic time-history analysis was conducted on the overall structure under rare earthquake. The vertical comfort level analysis of large-span connected structure was conducted. The results show that the structure can achieve the established goal of seismic performance, and has a good vertical comfort level.

Keywords:linked twin-tower; out-of-code high-rise building; performance-based seismic design; vertical comfort level; progressive collapse prevention

通讯作者：高鸣，硕士，高级工程师，一级注册结构工程师，Email：gaomingbj@163.com。