北京CBD核心区Z6地块项目主塔楼抗连续倒塌分析
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（奥雅纳工程顾问， 北京 100020）
［摘要］北京CBD核心区Z6地块项目主塔楼采用由巨柱、巨撑、密撑组成的斜交网格外框筒结构体系，内筒下部为含钢板钢筋混凝土核心筒，上部为钢框架核心筒。采用《高层建筑混凝土结构技术规程》（JGJ 3—2010）中的拆除构件法和附加侧向偶然作用法，对结构低、中、高区段不同位置处的巨柱、巨撑和密撑进行抗连续倒塌分析。结果显示，在爆炸或冲击荷载作用下，结构均未违反规范规定发生大范围的连续倒塌，结构布置方案满足偶然荷载作用下不发生连续性倒塌的要求。［关键词］北京CBD核心区Z6地块项目; 巨柱; 巨撑; 密撑; 抗连续倒塌中图分类号：TU318 文献标识码：A 文章编号：1002-848X(2015)24-0053-05
Progressive collapse analysis of main tower of Z6 Plot Project in core area of Beijing CBDYang Mingliu, Li Wanying, Zhong Congming(Arup, Beijing 100020, China)Abstract: The main tower of Z6 Plot Project in core area of Beijing CBD adopts diagrid perimeter frame tube structural system composed of mega columns, mega braces and close braces. Reinforced concrete corewall with steel plates inside locates in bottom of inner corewall and steel frame corewall locates at upper level. Progressive collapse analyses were carried out on mega columns, mega braces and close braces at different positions of low, middle and high zones using removing element method and additional lateral accidental action method in Technical specification for concrete structures of tall buildings (JGJ 3—2010). The results show that under action of explode or impact load, the structure meets code requirement and no large-scale progressive collapse occurs. Structural layout scheme meets requirement that no progressive collapse happens under action of accidental load.Keywords: Z6 Plot Project in core area of Beijing CBD; mega column; mega brace; close brace; progressive collapse作者简介：杨名流，硕士，Email：Young.Yang@arup.com。
