（奥雅纳工程顾问， 广州 510620）

［摘要］宁波东部新城C3-4#地块主塔楼结构高度约为420-3m，采用带3道伸臂桁架的框架-核心筒结构体系。为适应鼓形建筑体型和功能布置的需求，塔楼核心筒通过3次收进（含1次斜墙）来减小平面尺寸，全部楼层均采用了钢管混凝土斜柱，首次将所有3道伸臂桁架以外包混凝土内墙的形式穿过核心筒。主要介绍了塔楼结构体系的比选过程，针对核心筒的收进方式和型钢设置方式、外框柱的立面布置和截面形式、伸臂桁架与核心筒墙体连接节点的形式等进行详细研究和优化调整，基于刚重比和外框剪力分担比例偏小的问题，提出可行的解决方案和优化措施。

［关键词］结构方案比选； 钢管混凝土柱； 斜墙； 刚重比； 外框剪力分担比

中图分类号：TU973文献标识码：A文章编号：1002-848X(2019)22-0010-06

Structural scheme optimization of a main tower for Ningbo Eastern New Town

Hou Shengli, Zhao Hong, Liang Daoxuan

(Arup， Guangzhou 510620， China)

Abstract:The main tower of C3-4# block in Ningbo Eastern New Town is about 420-3m in height. The frame-corewall structural system with three outriggers was adopted. In order to meet the needs of drum-shaped building shape and function layout, the corewall of the tower reduces the plane size by three shape setbacks (including one inclined wall). All floors adopt concrete filled steel tubular(CFT) inclined columns. For the first time, all three outriggers are passed through the corewall in the form of concrete inner wall. The optimization process of the tower structural system was introduced, and detailed research and optimization adjustment were conducted on the setback mode of corewall and the setting mode of section steel, the vertical layout and section form of outer frame column, the connection form of extension truss and corewall. Based on the small proportion of ratio of stiffness to weight and external frame shear force share, feasible solutions and optimization measures were put forward.

Keywords:structural scheme optimization; CFT column; inclined wall; ratio of stiffness to weight; ratio of external frame shear force share

作者简介：侯胜利，硕士，高级工程师，一级注册结构工程师，Email：sheng-li.hou@arup.com。