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。 The main tower of Z6 project in the core area of ​​CBD in Beijing adopts a skewed grid frame structure composed of huge columns, huge supports and dense supports. The lower part of the inner cylinder is a reinforced concrete core with steel plates and the upper part is the steel core of the steel frame. Adopting the method of dismantling member method and additional lateral contingency method in the Technical Specification of High-rise Building Concrete Structure (JGJ 3-2010), the large columns, girdles and bracings at different positions in the low, middle and high sections of the structure are carried out Anti-continuous collapse analysis. The results show that under the action of explosion or impact load, the structure has not undergone a large range of continuous collapse in violation of the rules, and the structural arrangement meets the requirement of continuous collapse without accidental load.