甄伟，盛平，王轶，高昂，赵明

（北京市建筑设计研究院有限公司， 北京 100045）

 

［摘要］北京保利国际广场主塔楼高161.2m，结构形式采用钢管混凝土柱交叉网格外筒和钢筋混凝土内筒组成的筒中筒结构。外框筒由约45°角交叉编织的钢管混凝土斜柱和水平环梁组成，楼盖隔层悬吊，各层楼面均开有大面积的通高中庭洞口，并有连续多层悬挑10m的螺旋楼梯等，结构平面、竖向均不规则。分析了主体结构受力体系和特点，除对设计准则、结构体系和弹性分析结果简单介绍外，重点介绍了交叉网格超高层结构体系的抗震性能指标、内外筒的地震剪力和倾覆弯矩分配、楼面水平力的传递等，并介绍了交叉网格节点的设计方法、开大洞的中庭处外框筒的稳定性能、悬吊楼层和长悬挑螺旋楼梯的舒适度性能等。

［关键词］交叉网格外筒; 钢管混凝土柱; 网格节点; 稳定; 舒适度; 筒中筒结构

中图分类号：TU318;TU973.18       文献标识码：A       文章编号：1002-848X(2013)17-0075-06

 

Zhen Wei, Sheng Ping, Wang Yi, Gao Ang, Zhao Ming

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

 

Abstract: The building T1 of Poly Plaza has a total height of 161.2m. The structural system employed is tube-in tube system, which consists of CFST(concrete-filled steel tubular) diagrid outer tube and reinforced concrete central tube. The outer tube is composing of 45°inclined crossing CFST columns and horizontal ring beam. Floors are suspended every two floors. There are large openings in the slab at the atrium, and 10m cantilever spiral stair. There is irregularity both in plan and vertical arrangement. The performance and character of structural system are analyzed. As a high-rise building, besides the design criteria, structural system and elastic analysis results and the features are highlighted for the seismic performance, distribution of shear and overturning moment between outer and inner tube. The characters are also introduced on the design of diagrid nodes, stability of outer tube at large-opened atrium, the vibration comfort performance of suspended floors and long-cantilever spiral stair.

Keywords: diagrid outer tube; CFST column; diagrid node; stability; vibration comfort; tube-in tube structure

作者简介：甄伟，硕士，高级工程师，Email:zhenw@biad.com.cn。