（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］城奥大厦结构主体采用钢框架-混凝土核心筒结构体系，屋面采用双层钢网壳结构，与内部升到顶层的核心筒连接为一个整体； 项目还包括东南侧边庭结构、地下2层～地上2层的蛇形坡道等。本项目钢结构具有空间造型复杂、跨度大、荷载重等特点，采用SATWE和MIDAS Gen软件建立整体计算模型，对整体结构进行多遇地震下的反应谱分析； 采用MIDAS Gen软件对钢屋盖结构、边庭结构和蛇形坡道进行补充分析。计算结果表明，结构具有良好的抗震性能，钢结构安全性和冗余性可以保证。

［关键词］钢框架混凝土核心筒结构； 反应谱分析； 钢屋盖； 边庭结构

中图分类号：TU398+.2, TU318文献标识码：A文章编号：1002-848X(2020)20-0016-07

Structural design of Cheng′ao Building

PANG Yanfeng, ZHOU Sihong, ZHANG Shizhong, SHEN Kaizhen, CHI Xin, CHANG Hong

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

Abstract:The main structure of Cheng′ao Building adopts a steel frame-concrete corewall structural system, and the roof adopts a double-layer steel reticulated shell structure, which is connected to the corewall rising to the top as a whole; the project also includes the southeast side courtyard structure and serpentine ramps from 2 underground floors to 2 floors above the ground. The steel structure of this project has the characteristics of complex spatial modeling, large span, heavy load, etc. The overall calculation model was established with SATWE and MIDAS Gen software, and the response spectrum analysis of the overall structure was performed under frequent earthquake; the MIDAS Gen software was used to supplement the analysis of steel roof structure, side courtyard structure and serpentine ramp. The calculation results show that the structure has good seismic performance, and the safety and redundancy of the steel structure can be guaranteed.

Keywords:steel frame-concrete corewall structure; response spectrum analysis; steel roof; side courtyard structure

作者简介：庞岩峰，硕士，工程师，Email：pangyanfeng@biad.com.cn。