某项目角部超长悬挑楼盖分析与研究
摘要:中海成都天府新区超高层项目采用8根巨柱的巨型框架-核心筒-伸臂桁架结构体系,建筑外立面沿高度锥形收进。巨柱双向内倾,角部两巨柱最小距离控制不小于9.4m,相对应角部结构最大净悬挑12.45m。为保证楼面结构具有足够的冗余度,采用两阶段方法进行设计。建筑角部与悬挑部位舒适度控制尤为重要,结合幕墙龙骨位置,创新性地采用振动杆技术,通过串连避难层之间8层楼面的方式大幅改善楼盖舒适度,在实现超长结构悬挑、营造角部无柱空间、保证绝佳视觉体验的同时也确保了结构的安全性与经济性。
关键词:巨型结构;角部超长悬挑;两阶段设计方法;振动杆;楼面舒适度;
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[2] 李建伟,魏建峰,赵勇,等,前海法治大厦上部结构设计[J].建筑结构,2017,47(16):46-52.
[3] 朱明,张志强,柯长华,等.大跨度钢结构楼盖竖向振动舒适度的研究[J].建筑结构,2008,38(1):72-76.
[4] 张谨,杨律磊,郑志刚,等.舒适度验算的时域分析法和频域分析法对比与应用[J].建筑结构,2019,49(1):43-48.
[5] 高层建筑混凝土结构技术规程:JGJ 3—2010[S].北京:中国建筑工业出版社,2011.
[6] 建筑楼盖结构振动舒适度技术标准:JGJ/T 441—2019[S].北京:中国建筑工业出版社,2020.
[7] Floor vibrations due to human activity:steel design guide series 11[S].Chicago:American Institute of Steel Construction.Inc,2003.
[8] 李建伟,赵勇,杨斌斌,等.多筒体支承的大跨空间结构设计与研究[J].建筑结构,2021,51(1):19-25.
[9] 傅学怡,曲家新,陈贤川,等.时程频谱结合分析方法对展望桥人行舒适度的分析与控制[J].土木工程学报,2011,44(10):73-80.
[10] 李爱群,陈鑫,张志强,等.大跨楼盖结构减振设计与分析[J].建筑结构学报,2010,31(6):160-169.
Analysis and research on corner super-long cantilevered floor of a project
Abstract: China Overseas Property Chengdu Tianfu New District super high-rise project adopts a mega frame-corewall-outrigger structural system with 8 giant columns. The building facade is taperly set back along the height. The giant columns are inclined inward in two directions, and the minimum distance between the two giant columns at the corner is controlled to be no less than 9.4 m, and the maximum net cantilever of the corresponding corner structure is 12.45 m. In order to ensure that the floor structure has sufficient safety redundancy, the two-stage design method was adopted. The comfort control of the cantilevered part of the corner of the building was particularly important. The vibrating rod technology was innovatively adopted combined with the position of the curtain wall keels to greatly improve the floor comfort by connecting 8 office floors between the refuge floors in series. This realized the super-long floor cantilever, created column-free corners, created an excellent visual experience and realized the safety and economy of the structure.
Keywords: mega structure; corner super-long cantilever; two-stage design method; vibrating rod; floor comfort
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