(中国建筑西北设计研究院有限公司, 西安 710018)

摘要: 西安环球贸易中心 1#楼,建筑总高度 299. 75m,采用框架-核心筒-带加强层组合结构体系,是具有扭转不规则、楼板局部不连续、竖向刚度突变等不规则项的超 B 级高度的高层建筑。 为了提高结构刚度,沿建筑物高度均匀设置了 3 道伸臂桁架加强层,未配套采用环桁架。 根据规范要求,采用两种不同力学模型软件 SATWE 和 MIDAS Building,进行了小震弹性对比分析;采用 MIDAS Building 进行了小震弹性时程分析。 并根据设定的抗震性能目标,对主体结构主要部位和关键构件进行了性能化设计。 根据本项目的特殊性,结合规范要求,进行了罕遇地震作用下的动力弹塑性时程分析。 计算和分析结果表明,各项指标均符合设计要求,结构及构件均能够达到预设性能目标,结构体系合理,安全可靠。

关键词: 西安环球贸易中心; 超高层结构; 伸臂桁架; 加强层; 抗震性能化设计; 动力弹塑性时程分析

中图分类号:TU318 文献标志码:A 文章编号:1002-848X(2022)11-0079-09

DOI:10. 19701 / j. jzjg. XBY2209

Structural design and analysis of 1# building of Xi’ an Global Trade Center

WANG Taotao, GAO Lei, LÜ Xudong, YANG Qi, ZENG Fansheng, ZHOU Peng

(China Northwest Architecture Design and Research Institute Co. , Ltd. , Xi’ an 710018, China)

Abstract:1# building of Xi ’ an Global Trade Center, with a total building height of 299. 75m, adopts a frame-core tube-strengthened layer composite structure system, and is a super B-level high-rise building with irregular items such as torsional irregularity, partial discontinuity of floor slab and sudden change in vertical stiffness. In order to improve the rigidity of the structure, three outrigger truss reinforcement layers are evenly set along the height of the building, and ring trusses are not used. According to the requirements of the code, two softwares with different mechanical model SATWE and MIDAS Building were used to carry out comparative analysis under the action of small earthquakes; and MIDAS Building was used to carry out the elastic time history analysis under the action of small earthquakes. According to the set seismic performance target, the performance-based design of the main parts and key components of the main structure was carried out. According to the particularity of this project, combined with the requirements of the code, the dynamic elastoplastic time-history analysis under the action of rare earthquake was carried out. The calculation and analysis results show that all the indicators meet the design requirements, the structure and components can achieve the preset performance targets, the structure system is reasonable, safe and reliable.

Keywords:Xi ’ an Global Trade Center; super high-rise structure; outrigger truss; reinforcement layer; seismicperformance-based design; dynamic elastoplastic time-history analysis