新国展二期结构设计关键技术  

Key technique for structural design on second-phase project of China International Exhibition Center

作　　者：李芊[1] 宋子魁 钮亚楠 常婷[1] 苏伏龙 郝振宇 张琳[1] 韩巍[1] LI Qian;SONG Zikui;NIU Yanan;CHANG Ting;SU Fulong;HAO Zhenyu;ZHANG Lin;HAN Wei(Beijing Institute of Architectural Design,Beijing 100045,China)

机构地区：[1]北京市建筑设计研究院有限公司,北京100045

出　　处：《建筑结构》2023年第18期7-11,118,共6页Building Structure

基　　金：新国展二期项目结构关键技术研究(2022-080)。

摘　　要：新国展二期项目为大型会展综合体,结构整体地下一层,局部地下二层,地上分为2个无柱展厅、7个有柱展厅、北登录厅、东登录厅、南登录厅、连桥、会议中心和酒店相互独立的结构单元。选取部分单体介绍其结构选型及特点,结构设计的关键技术。展厅大跨度屋盖采用钢桁架结构体系,非线性承载力分析及抗连续倒塌分析证明其具有良好的稳定性及承载能力;东登录厅为特别不规则的超限结构,按照“C”级目标进行性能化设计,其受力及变形均满足性能标准要求;北登录厅采用钢框架结构,两侧通廊设置滑动钢支座与会议中心、酒店相连,承载力分析及钢支座有限元分析结果表明其结构布置合理、安全;展览东、西区之间设有72m大跨度钢连桥,连桥两端设置摩擦摆支座与各展厅、登录厅连通。对摩擦摆支座进行小震反应谱分析及大震时程分析,结果表明,支座设计允许滑动量满足变形要求。The second-phase project of China International Exhibition Center is a large-scale exhibition complex.The overall structure is 1 floor underground and part is 2 floor underground.The above-ground part is divided into independent structural units:2 column-free exhibition halls,7 exhibition halls,north landing hall,east landing hall,south landing hall,bridge,conference centre and hotel.The structure system selection and characteristic of some projects and the key technology of structure design were introduced.In the exhibition halls,the steel trusses are used in roof structures.The non-linear bearing capacity analysis and anti-progressive collapse show that the structure has sufficient bearing capacity and stability.The east landing hall is particularly irregular out-of-code structure.It is designed for performance according to the“C”level target,and its force and deformation meet the performance standards.The steel frame structure is adopted in the north landing hall.Both sides are connected to the conference centre and the hotel by using the steel sliding bearing.The bearing capacity analysis and finite element analysis of steel sliding bearing prove that the structure arrangement is reasonable and safe.The 72m-large steel bridges are connected between the east and west exhibition halls.The friction pendulum bearings are set up at both ends of the bridge.The response spectrum analysis of small earthquake and time history analysis of large earthquake show that the sliding momentum can meet the deformation requirements.

关 键 词：新国展 大型会展综合体 大跨度钢屋盖 非线性承载力分析 抗连续倒塌分析 超限结构 大跨度钢连桥 

分 类 号：TU318[建筑科学—结构工程]