（1 香港华艺设计顾问（深圳）有限公司， 深圳 518057； 2 广州大学土木工程学院， 广州 510006）

［摘要］深圳工商银行大厦的裙楼三面悬挑，其中南面悬挑尺寸为11-35m，依靠六榀单层悬挑桁架来承受悬挑荷载。悬挑桁架的斜腹杆呈V形且未往跨内延伸，这给结构工程师带来很大的挑战。深入研究V形腹杆悬挑桁架的传力模式，并提出悬挑部位的相应设计方法。通过抗连续倒塌分析、施工过程验算及节点有限元模拟等验证悬挑部位结构的承载能力；楼盖舒适度分析结果表明，悬挑部位设计能满足办公建筑舒适度要求；悬挑桁架的极限承载力分析结果也表明其承受竖向荷载能力有较高的冗余度。

［关键词］深圳工商银行大厦； V形桁架；传力模式；设计方法；极限承载力分析

中图分类号：TU313，TU318-2文献标识码：A文章编号：1002-848X(2016)13-0007-06

Analysis and design on podium cantilevered trusses of Shenzhen ICBC building

Lin Chaowei1,2，  Wang Xingfa1， Xia Xiyao1， Hu Tao1， Guo Hong1， Wu Yan1

（1 HongKong HuaYi Design Consultants（Shenzhen）Ltd.， Shenzhen 518057， China;2 School of Civil Engineering, Guangzhou University, Guangzhou 510006, China）

Abstract:The podium of Shenzhen ICBC building is supported by cantilever on three sides. The south cantilever is 11-35 metres which relies on six cantilevered trusses to undertake the load. Diagonal web member of cantilevered truss is V-shaped and does not extend to inside, which poses a great challenge to structural engineers. The force transmission mode of this V-shaped diagonal web member was analyzed, and the corresponding design of cantilevered parts was proposed. Finally, the carrying capacity of cantilevered parts was verified in such ways as anti-progressive collapse analysis, construction process checking and finite element node simulation. Floor comfort analysis shows that the design of cantilevered parts of this building can meet comfort requirements. In addition, the  ultimate capacity analysis results of cantilevered truss also show that cantilevered truss can resist vertical load, and even has enough redundancy.

Keywords:Shenzhen ICBC building; V-shaped truss; force transmission mode; design method; ultimate capacity analysis

作者简介：林超伟，博士研究生，高级工程师，一级注册结构工程师，Email：wei65125036@163.com。