(湖南省建筑设计院集团股份有限公司, 长沙 410012)

摘要: 某结构高度为 303. 0m 超高层建筑,最大高宽比达 9. 2,地上 66 层,地下 6 层,采用框架-核心筒+加强层的结构体系,以钢管混凝土叠合柱框架+钢筋混凝土核心筒+伸臂桁架+环带桁架作为抗侧力体系。 该建筑简化为悬臂杆来分析结构强度、刚度、稳定性。 通过调整合理的周期、位移,控制了结构刚度。 选用结构刚重比及屈曲荷载为指标,验证结构在水平作用下的稳定性。 分析了在极限状态下加强层构件的承载力以及节点的弹塑性发展。 通过动力弹塑性时程分析,研究了结构的薄弱位置及延性。 静力、动力的分析结果表明,结构抗震性能较好,满足既定性能目标。

关键词: 超限高层结构; 大高宽比结构; 加强层; 刚重比; 整体稳定性; 节点分析; 动力弹塑性分析

中图分类号:TU318 文献标志码:A 文章编号:1002-848X(2022)22-0046-06

DOI:10. 19701 / j. jzjg. 20221164

Structural design and key problem research of out-of-code high-rise structure with largeaspect ratio

MAO Jianyu, DONG Bing, WANG Siqing, FANG Hui

(Hunan Architectural Design Institute Group Co. , Ltd. , Changsha 410012, China)

Abstract: A super high-rise building with a structural height of 303. 0m and a maximum height to width ratio of 9. 2 has66 floors above ground and 6 floors underground. The building adopts the frame-core tube structure system with thestrengthened stories, the concrete-filled steel tubular composite column frame, the reinforced concrete core tube, theoutrigger truss and the annular truss are together comprising lateral force resistance system. Taking the building as thecantilever rod as the analysis object, the structural strength, stiffness and stability were investigated. The structuralstiffness was controlled by adjusting a reasonable period and displacement. The structural stiffness to weight ratio andbuckling load were selected to as indicators to verify the stability of the structure under horizontal action. The bearingcapacity of members and the elastic-plastic development of joints of reinforcing layers were analyzed under the ultimatestate. The weak position and ductility of the structure were studied by dynamic elastoplastic time history analysis. Theanalysis results of the static and dynamic show the structure has a good seismic performance and could meet theestablished performance objectives.

Keywords:out-of-code high-rise structure; large height to width ratio structure; strengthened story; stiffness to weightratio; overall stability; joint analysis; dynamic elastic-plastic analysis

∗湖南省建筑设计院集团股份有限公司科技研发课题(KY0300-0000-2019-0012)。

第一作者:毛健宇,硕士,高级工程师,一级注册结构工程师,主要从事结构设计工作,Email:85157008@ qq. com。

[引用本文] 毛健宇,董冰,王四清,等. 大高宽比超限高层结构设计及关键问题研究[ J]. 建筑结构,2022,52(22):46-51. MAO Jianyu,DONG Bing,WANG Siqing,et al. Structural design and key problem research of out-of-codehigh-rise structure with large aspect ratio[J]. Building Structure,2022,52(22):46-51.