高烈度地区超高层结构方案研究  

Study on structure scheme for a super high-rise building in high-intensity area

作　　者：李博宇[1] 曲原 王然[1] 束伟农[1] 张连河 毕鹏飞 LI Boyu;QU Yuan;WANG Ran;SHU Weinong;ZHANG Lianhe;BI Pengfei(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124-130,共7页Building Structure

摘　　要：针对高烈度地区超高层建筑的结构方案,以西安市万博商业综合中心项目中的250m超高层建筑酒店为例。在方案阶段,依据不同结构体系在安全性、适用性以及经济性上的对比,最终采用型钢混凝土柱+钢梁+混凝土核心筒+伸臂桁架作为本项目的主要结构体系。在深化设计阶段,对比在超高层建筑中采用传统结构体系,即框架-核心筒+伸臂桁架结构体系,和框架-核心筒+伸臂桁架+消能减震结构(防屈曲约束支撑)体系这两种结构体系的整体指标和结构受力分析结果,并且研究了在超高层建筑中不同楼层设置伸臂桁架的部位对结构整体指标和结构受力的影响,最终确定了采用消能减震结构的结构体系作为合理的结构方案。采用抗震性能化设计,对结构进行大震弹塑性时程分析,验证了框架-核心筒+伸臂桁架+消能减震结构体系的抗震性能。通过对高烈度区超高层结构方案的对比研究,使结构方案更加安全、合理。For the structural scheme of super high-rise buildings in high-intensity areas,taking the 250m super high-rise hotel in Xi’an Wanbo Commercial Comprehensive Center project as an example,the scheme stage mainly compares different structural systems in terms of safety,applicability and economy,and finally selects the structural system of steelreinforced concrete column+steel beam+concrete core tube+outrigger truss as the main structural scheme of the project.In the deepening design stage,the overall indexes and structural stress analysis results of the two structural systems used in the super high-rise building,namely the frame-core tube+boom truss structural system and the frame-core tube+boom truss+energy dissipation structure(buckling restrained brace)system were compared,and the effects of the location of boom truss in different floors of the super high-rise building on the overall indexes and structural stress were studied the final decision was made to use a structural system with energy dissipation structures as a reasonable structural scheme.Utilizing performance-based seismic design,the seismic performance of the frame-core tube+boom truss+energy dissipation structure system was verified by large earthquake elastic-plastic dynamic analysis.By comparing and studying the structural schemes of super high-rise buildings in high-intensity areas,the structural schemes are made safer and more reasonable.

关 键 词：超高层结构 防屈曲约束支撑 伸臂桁架 框架-核心筒体系 抗震性能化设计 弹塑性时程分析 

分 类 号：TU973.17[建筑科学—结构工程]